US20230022205A1 - Cell-based vehicles for potentiation of viral therapy - Google Patents
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Definitions
- carrier cells are carrier cells (cell vehicles) and virus combinations and methods for treatment of cancers, and methods of matching such to subjects for treatment.
- Oncolytic viruses show promise as cancer therapeutics.
- Oncolytic viruses are designed to accumulate and replicate in cancerous cells.
- the oncolytic viruses can lyse cancerous cells and also can be used to encode and deliver anti-cancer agents.
- the efficacy of oncolytic viruses can be impeded by circulating neutralizing antibodies, innate and adaptive immune mechanisms, and other clearing mechanisms that interfere with the delivery and/or accumulation of the viruses in cancerous tumors/cells. There is a need for improved delivery methods for effecting oncolytic therapy.
- a challenge of oncolytic therapy is that the immune system of the treated subject functions to eliminate viral infections.
- Oncolytic viruses preferentially replicate in tumor tissue and other immunoprivilaged environments, but, particularly if they are systemically administered, they must escape from, avoid, or otherwise be protected from the host's immune (innate and adaptive) responses so that sufficient virus reaches tumors and metastases.
- Delivery vehicles also referred to herein as carrier cells, or cell vehicles
- Cancer cells, tumor cells, as well as various types of stem cells and normal cells can carry oncolytic viruses in order to help protect them from complement and antibody mediated neutralization in circulation.
- the virus must be able to replicate in the cells, and at the same time escape the host's immune system, for a sufficient time to reach a tumor or tumor cells, and deliver virus. It is these properties that render cells suitable as carrier cells for oncolytic or therapeutic viruses. In general, however, when cells are administered, particularly systemically, but even locally, there are problems, including, but not limited to:
- the cells include any that can be used to deliver virus to tumors, and, include stem cells, tumor cells, cell lines, primary cells, and cultured primary cells.
- the cells include stem cells, with the proviso that, where embryonic stem cells or cells derived from embryonic stem cells or cell lines are not permitted, reference to stem cells does not include such cells.
- the cells include any stem cells, except for embryonic stem cells and/or cells derived from embryonic stem cells or cell lines.
- the cells can be autologous or allogeneic.
- Methods herein render it possible to use allogeneic cells, including off-the-shelf allogeneic stem and cancer cell lines, not only to deliver, but also to provide potent intratumoral amplification of oncolytic viruses, thereby overcoming the existent allogeneic barriers.
- the cells provided herein have improved properties for delivery of oncolytic viruses to tumors. While any route of administration is contemplated, the cells can be administered via systemic administration.
- the cells are modified and/or treated (sensitized) to eliminate, reduce or avoid the host immune system, including complement, and host anti-virus immune responses.
- the cells also are modified or engineered or selected so that the particular oncolytic virus of interest can replicate in the cells, so that therapeutic amounts are delivered to tumors, metastases, and/or the tumor microenvironment.
- High intrinsic virus amplification ability of the cell-based delivery vehicle is not sufficient to guarantee ability for intratumoral amplification of the oncolytic virus by the carrier cells in situ/in vivo.
- the amplification potential of the cell-based delivery vehicle can be restricted or completely blocked by the immune responses of individual subjects against the virus or the cells, particularly allogeneic carrier cells.
- This problem can be overcome by employing alternative and complementing strategies involving, one or more of: 1) an assay-based matching between the patient and the allogeneic cell-based delivery vehicle; 2) sensitization and protection of the cell-based delivery vehicle for improved oncolytic virus amplification and delivery; and 3) engineered resistance to the innate and adaptive immune barriers by introduction of specific genetic modifications into the cell-based delivery vehicle.
- oncolytic therapy is improved and problems solved by factors and treatments and/or by modifications that increase or maintain viral amplification in the cell, and/or that can decrease host immune response, such as complement, or allogeneic recognition, and/or that sensitize or engineer cells to evade allogeneic recognition or complement, and/or other such responses, to permit sufficient time for the cells to deliver virus to tumors and for virus to replicate.
- Type I and type II interferons IFNs
- IFNs are potent inducers of the anti-viral state in stem cells, and in some tumor cells. This interferes with the ability of these cells to get infected and support virus amplification.
- the carrier cells can be sensitized, for example, treated or pre-treated, and/or engineered, to enhance virus amplification and/or to suppress induction of the anti-viral state upon administration of cells containing virus to the host.
- Target(s) for achieving this include, for example, inhibiting interferon signaling and/or inhibiting the JAK-STAT signaling pathway, such as inhibiting JAK1/2.
- the cells can be treated or engineered to express inhibitors of interferon or interferon signaling pathways.
- the cells, tumor cells and/or stem cells can be pre-treated, prior to administration, with a JAK1/2 inhibitor, and/or an interferon inhibitor.
- a JAK1/2 inhibitor e.g., Ruxolintib, Oclacitinib, and Baricitinib.
- Human serum can have numerous deleterious effects on stem cell carriers, including directly attacking and killing the virus infected carrier cells before they have completed their virus amplification and/or release of virus particles, thus limiting virus spread into the target tumor cells.
- the cells can be pre-treated or engineered to protect against or evade complement.
- Targets include the classical and alternative pathways for complement activation, such as complement proteins C3 or C5.
- Inhibitory antibodies such as an anti-C5 antibody marketed under the name Soliris® (Alexion), and inhibitors of C3 cleavage, such as compstatin, and other such inhibitors of complement activation, can be used to protect cells against complement.
- Various inhibitors of complement activation are well-known in the art.
- the cells can be treated or engineered to suppress and/or eliminate the determinants responsible for allogeneic recognition and rejection. This can augment the therapeutic potential of allogeneic stem or tumor cells to deliver oncolytic viruses in an off-the-shelf fashion, evading allogeneic recognition and rejection.
- Such allogeneic rejection determinants include the highly polymorphic and patient-specific MHC Class I and Class II molecules recognized by CD8 and CD4 T cells, and a broad spectrum of less polymorphic determinants recognized by various innate T cell subpopulations like NKT, iNKT, and mixed innate/adaptive populations like ⁇ (gd) T cells, including, but not limited to, MHC-like MICA/MICB and CD1a,b,c,d molecules, as well as various other stress-related or stress-sensing molecules, such as butyrophilins and Annexin A2.
- the cells can be sensitized/engineered to evade or inhibit allogeneic recognition/rejection targets.
- Such targets include, for example, determinants of allogeneic rejection by T and NK cells, including HLA-A, HLA-B, HLA-C, and NKG2D, which is an activating receptor expressed on NK cells, CD8 + cells, subsets of CD4 + cells, and gamma-delta T cells (gd T cells or ⁇ T cells).
- Immune responses to HLA determinants can be blocked, for example, with pan HLA-A,B,C blockade, such as with a pan-HLA blocking antibody, such as Tü39 (BioLegend).
- Immunologic responses and rejection of allogeneic and virus-infected stem or tumor carrier cells can be enhanced by engagement of various non-MHC markers, which typically are up-regulated on the surface of virally infected or transformed tumor cells, and that serve as immune co-stimulatory molecules.
- markers can directly modulate the ability of the carrier cells to evade immunological rejection.
- NKG2D molecules receptors
- MHC Class I-related proteins such as human MICA and MICB, that function as co-stimulatory molecules involved in the recognition and rejection of virus-infected and transformed tumor cells. As shown herein, they play a role in regulating the immune-evasive potential of oncolytic virus carriers.
- NKG2D molecules have complex biology and can sensitize cells to be targeted by innate and adaptive cellular immunity mediated by NK and CD8 T cells or, when shed from the surface and secreted, also function as potent immune-suppressors.
- NKG2D can be inhibited directly by blocking its activation, and/or by inhibiting its ligands, such as MICA, MICB and others.
- the HLA blockade enhances immune evasion by the cells; NKG2D engagement compromises immune evasion by the cells.
- Virus amplification in the carrier cells causes a gradual loss of cell viability and immunosuppressive potential.
- cells are treated or engineered to express immunosuppressive agents.
- cells are treated with a high dose of the immunosuppressive cytokine IL-10 to reverse the virus-mediated loss of immunosuppressive properties and improve the ability of virus-infected carrier cells to avoid allogeneic rejection/responses or early immune recognition.
- the cells can be sensitized with or engineered to secrete immunosuppressive factors, such as IL-10, or members of the PDL-1/PD-1 pathway. For example, pre-treatment with or engineering the cells to express IL-10, which suppresses immune responses to the cells.
- cell carriers including tumor cells and stem cells, including allogeneic stem and tumor cells
- Treatments can be effected prior to administration of the cells, or can be effected by co-administration of the agent(s).
- the following tables provide examples of targets, treatments and modifications. These and others are detailed in the description and examples below.
- Cell Vehicles Sensitized (Treated) for Improved Viral Amplification and/or Immunomodulation Improvement/ Mechanism of Modification Action or target Exemplary Treatment Enhancing virus Immunosuppression Pre-treating/loading the cell vehicles with one or more amplification to protect cells, of IL-10; TGF ⁇ ; VEGF; FGF-2; PDGF; HGF; IL-6; ability of the using immune- GM-CSF; Growth factors; receptor tyrosine kinase cells suppressive factors, (RTK)/mTOR agonists; wnt protein ligands; and and/or inhibitors of GSK3 inhibitors/antagonists (e.g., Tideglusib, immune activation Valproic acid).
- GSK3 inhibitors/antagonists e.g., Tideglusib, immune activation Valproic acid
- IFN Pre-treating/loading the cell vehicles with small induction of the Type I/Type II molecule or protein inhibitors of, for e.g., anti-viral state receptors and IFNAR1/IFNAR2 signaling; IFNGR1/IFNGR2 downstream signaling; STAT1/2 signaling; Jak1 signaling (e.g., signaling/ Tofacitinib, Ruxolitinib, Baricitinib); Jak2 signaling responsiveness (e.g., SAR302503, LY2784544, CYT387, NS-018, BMS-911543, AT9283); IRF3 signaling; IRF7 signaling; IRF9 signaling; TYK2 signaling (e.g., BMS-986165); and TBK1 signaling (e.g., BX795, CYT387, AZ13102909).
- Jak1 signaling e.g., signaling/ Tofacitinib, Ruxolitinib
- HDAC inhibitors e.g., Vorinostat, Romidepsin, Chidamide, Panobinostat, Belinostat, Valproic acid, Mocetinostat, Abexinostat, Entinostat, SB939, Resminostat, Givinostat, Quisinostat, HBI-8000, Kevetrin, CUDC-101, AR-42, CHR-2845, CHR-3996, 4SC-202, CG200745, ACY- 1215, ME-344, Sulforaphane and/or Trichostatin.
- HDAC inhibitors e.g., Vorinostat, Romidepsin, Chidamide, Panobinostat, Belinostat, Valproic acid, Mocetinostat, Abexinostat, Entinostat, SB939, Resminostat, Givinostat, Quisinostat, HBI-8000, Kevetrin, CUDC-101, AR-42, CHR-2845, CHR-3996,
- Virus Pretreatment/loading of the cells with antagonists of sensing and/or anti- viral origin, including, but not limited to, one or more virus defense of: K1, E3L, K3L proteins (Vaccinia); NS1/NS2 pathways mediated proteins (Influenza); NS3-4A (Hepatitis C); NP and by, e.g., STING, Z proteins (Arenavirus); VP35 (Ebolavirus); US11, PKR, RIG-1, MDA- ICP34.5, ICP0 (HSV); M45 (MCMV); and X protein 5, OAS-1/2/3, (BDV: Borna Disease Virus).
- K1, E3L, K3L proteins Vaccinia
- NS1/NS2 pathways mediated proteins Influenza
- NS3-4A Hepatitis C
- NP e.g., STING, Z proteins (Arenavirus); VP35 (Ebolavirus); US11, PKR, RIG-1, MDA- ICP3
- AIM2, MAVS, RIP- 1/3, DAI (ZBP1) Protection MHC/HLA Pre-treating/loading the cells with MHC antagonists against Antagonism of viral origin, e.g., one or more of: A40R allogeneic (Vaccinia); Nef and TAT (HIV); E3-19K inactivation/ (Adenovirus); ICP47 (HSV-1/2); CPXV012, rejection CPXV203 (Cowpox); ORF66 (VZV); EBNA1, determinants BNLF2a, BGLF5, BILF1 (EBV); US2/gp24, US3/gp23, US6/gp21, US10, USH/gp33 (hCMV); Rh178/VIHCE (RhCMV); U21 (HHV-6/7); LANA1, ORF37/SOX, kK3/MIR1, kK5/MIR2 (KSHV); mK3 (MHV-68); UL41/vhs (
- MIC-A and MIC- MIC-A and MIC-B/ B antagonists e.g., kK5 (KHSV).
- NKG2D modulation Immune Immunosuppression Pre-treatment/loading with one or more suppression and using various immunosuppressing factors of viral origin including, evasion immunosuppressive but not limited to: inhibitors of immune factors FAS/TNF/Granzyme B-induced apoptosis (e.g., Ectromelia/Vaccinia virus SP1-2/CrmA); IL- 1/NFkB/IRF3 antagonists (e.g., Vaccinia virus- encoded N1); IL-1 and TLR antagonists (e.g., IL-18 binding protein, A46R, A52R); IL-1 ⁇ antagonists (e.g., B15R/B16R); TNF ⁇ blockers (e.g., Vaccinia virus CmrC/CmrE); I
- Pre-treatment/loading with small molecule inhibitors of TAP1/2 and/or tapasin Protection Inhibition of Pre-treating/loading the cells with inhibitors of against complement factors complement factors, including, but not limited to, complement (e.g., C1, C2, C3, one or more of: VCP (Vaccinia virus complement C4, C5, MBL) control protein); B5R (Vaccinia virus complement inhibitor); scFv anti-CD1q/CD1r/CD1s; anti-C3 antibodies; anti-C5 antibodies (e.g., Eculizumab); peptidic C3 inhibitors of the compstatin family (e.g., Cp40); Human soluble membrane (s/m) proteins (e.g., s/mCR1 (CD35), s/mCR2 (CD21), s/mCD55, s/mCD59); Human Factor H and derivatives; and Cobra venom factors and derivatives with complement inhibitory activity.
- complement e.g., C1, C2,
- Pretreatment with Provides extended Pre-treatment/loading with Type 1 Type I and/or Type survival and/or IFN (e.g., IFN ⁇ , IFN ⁇ ) and/or Type II interferons improved local II IFN (e.g., IFN ⁇ ).
- immunosuppression Pretreatment with agonists/inducers Provides extended Pre-treatment/loading with agonists of anti-viral state survival and/or of STING, PKR, RIG-I, MDA-5, improved local OAS-1/2/3, AIM-2, MAVS, RIP- immunosuppression 1/3, and/or DAI (ZBP1) pathways.
- cytosolic viral DNA/RNA-sensing and anti-viral defense machinery Transient or Engineering cells to express one or more of permanent expression K1, E3L, K3L (Vaccinia); NS1/NS2 of antagonists of (Influenza A); NS3-4A (Hepatitis C); NP, Z virus-sensing and protein (Arenavirus); VP35 (Ebolavirus); anti-viral defense US11, ICP34.5, ICP0 (HSV); M45 pathways mediated (MCMV); and X protein (BDV: Borna by, e.g., STING, Disease Virus).
- PKR PKR, RIG-1, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, DAI (ZBP1) Engineered to evade Transient or Engineering cells to suppress expression of allogeneic recognition by permanent HLA-A, B, C molecules.
- MHC- like molecules Transient or Engineering cells to suppress expression permanent of, for example, TAP1/2, Tapasin, Beta-2 suppression of microglobulin, CIITA, RFXANK, RFX5 expression of and RFXAP.
- regulators of transcription or expression of MHC Class 1, MHC Class II, and MHC-like molecules Transient or Engineering cells to express ⁇ 2 M permanent expression antagonists of viral origin, e.g., UL18 of antagonists of (HCMV).
- MHC and MHC-like Engineering cells to express MHC molecules antagonists of viral origin e.g., one or more of: A40R MHCI (Vaccinia); Nef, TAT (HIV); E3-19K (Adenovirus); ICP47 (HSV-1/2); CPXV012, CPXV203 (Cowpox); EBNA1, BNLF2a, BGLF5, BILF1 (EBV); ORF66 (VZV); US2/gp24, US3/gp23, US6/gp21, US10, US11/gp33 (hCMV); rh178/VIHCE (RhCMV); U21 (HHV-6/7); LANA1, ORF37/SOX, kK3/MIR1, kK5/MIR2 (KHSV); mK3 (MHV-68); UL41/vhs (a-herpesvirus, HSV, BHV-1, PRV); UL49.5 (Varicellovirus, BHV-1,
- Engineering cells to express anti-HLA, anti-MHC, and/or anti-MHC-like molecule antibodies Engineered to evade Transient or Engineering cells to suppress expression allogeneic recognition by permanent of, e.g., membrane-bound MICA/B NK cells and/or innate suppression of (NKG2D ligands); membrane-bound PVR immune responses of ⁇ T expression of ligands (DNAM-1 ligand); and/or membrane- cells. of NK cell and/or ⁇ T bound Nectin-2 (DNAM-1 ligand).
- NKG2D receptors e.g., Cowpox of antagonists of NK OMCP.
- NK inhibitory receptors e.g., of ligands for NK HLA-Bw4; HLA-C2. and/or ⁇ T cell Engineering cells to express ligands for inhibitory receptors NKG2a/CD94 (NK inhibitory receptors), e.g., HLA-E and derivatives alone, or combined with 21M HLA-B ligands to generate HLA-E binding peptides and stabilize HLA-E surface expression.
- Engineering cells to express factors of viral origin including but not limited to, Ectromelia/Vaccinia virus SPI-2/CrmA (inhibitor of immune FAS/TNF/Granzyme B induced apoptosis); Vaccinia Virus encoded N1 (IL-1/NFkB/IRF3 antagonist); HA (NCR antagonists targeting NKp30, NKp44, NKp46); IL-18 binding protein; A40R; A46R; A52R; B15R/B16R; TNF ⁇ blockers (e.g., Vaccinia virus CmrC/CmrE); IFN ⁇ / ⁇ blockers (e.g., Vaccinia virus B18R/B19R); IFN ⁇ blockers (e.g., Vaccinia virus B8R); and other IL-1/IL- 1 ⁇ /NFKB/IRF3/NCR/MHCI/TLR/ NKG2D antagonists.
- cancer associated antigens e.g., cancer derived factors that non-permissive testis antigens (MAGE-A1, MAGE-A3, facilitate viral infection of (impermissive) cell MAGE-A4, NY-ESO-1, PRAME, CT83, otherwise non-permissive vehicles and/or tumor SSX2, BAGE family, CAGE family); (impermissive) cells cells oncofetal antigens (AFP, CEA); oncogene/tumor suppressors (myc, Rb, Ras, p53, Telomerase); differentiation antigens (MELAN, Tyrosinase, TRP-1/2, gp100, CA-125, MUC-1, ETA); GM- CSF; IL-10; TGF ⁇ ; VEGF; FGF-2; PDGF; HGF; IL-6; growth factors; RTK/mTOR agonists; and wnt protein ligands.
- cancer associated antigens e.g., cancer derived factors that non-permissive testis
- protein antagonists of complement the function of and serum factors e.g., antagonists of C1,
- kits for capture patient-specific differences in the immune responses to the virus and stem cells providing proper subject-carrier cell matching and permitting the effective use of off-the-shelf allogeneic cell-based delivery platforms and/or development of allogeneic cells for use as viral cell carriers that address the problems discussed above.
- the use of allogeneic stem cells for oncolytic virus delivery is facilitated by the lack of requirement for long-term survival and engraftment of the cells; hence the methods herein can work across insignificant MEW mismatch barriers.
- Subjects and carrier cells can be treated and modified as described herein and matched to subjects for effective delivery of virus.
- the methods and cells also can be practiced with autologous cells.
- the carrier cells, and the carrier cells containing viruses are also provided.
- Cell vehicles have been used as carriers (carrier cells) to deliver virus, helping the virus evade circulating antibodies and immune mechanisms and delivering the virus to the cancerous tumors/cells.
- the carrier cells can boost amplification of the virus at the tumor site, thereby increasing its therapeutic efficacy and permitting the virus to overcome intrinsic tumor cell resistance as well as innate and adaptive immune barriers.
- carrier cells cell vehicles
- allogeneic carrier cells that comprise an oncolytic virus.
- the allogeneic carrier cells are matched to subject by methods described herein.
- the virus and carrier cells generally are co-cultured prior to administration, but they can be administered separately, such as sequentially, in different compositions.
- carrier cells co-cultured with or infected with virus can be administered, and additional carrier cells that have not been co-cultured with or infected with virus can be administered.
- oncolytic therapy is improved and problems solved, by factors and treatments and/or by modifications of cells that increase or maintain viral amplification in the cell, and/or decrease host immune response, such as complement and/or HLA responses and other such responses, against the cells to permit sufficient time for delivery of virus to tumors.
- the methods also can aid in selecting an appropriate virus for a particular cell type.
- carrier cells and carrier cells that comprise an oncolytic virus, wherein: the virus can replicate in the cell; the cell can be administered to a human subject; the cell has been treated or modified or both to enhance the immunosuppressive properties or immunoprivilaged properties of the cell for administration to a human subject; and, optionally, the cell has been treated or modified to enhance amplification of the virus in the cell.
- Carrier cells that have been treated or modified or both to enhance the immunosuppressive properties or immunoprivilaged properties of the cell for administration to a human subject; and that have been treated or modified to enhance amplification of the virus in the cell are provided.
- carrier cells that are permissive for oncolytic virus amplification, and that accumulate in tumors and/or carrier cells that are not recognized by the immune system of the subject for a time sufficient to deliver virus to a tumor in a subject.
- a goal is for the cells to survive long enough to amplify the virus and deliver virus to tumors, and metastases. Ultimately, the cells will dissipate in number as they are lysed by virus.
- the carrier cells are treated or modified stem cells, immune cells, and tumor cells.
- the cells are stem cells, the cells are not embryonic or fetal stem cells, or derived from an embryonic cell line.
- the carrier cells can be removed or harvested from a subject and infected with the oncolytic virus, or they can be allogeneic.
- the stem cells can be adult stem cells, or, where permitted, embryonic stem cells or fetal stem cells.
- Exemplary carrier cells can be selected from among mesenchymal, neural, totipotent, pluripotent, induced pluripotent, multipotent, oligopotent, unipotent, adipose stromal, endothelial, bone marrow, cord blood, adult peripheral blood, myoblast, small juvenile, epithelial, embryonic epithelial, and fibroblast stem cells.
- the carrier cell is a mesenchymal stem cell.
- mesenchymal stem cells are mesenchymal cells from adult bone marrow, adipose tissue, blood, dental pulp, neonatal umbilical cord, cord blood, placenta, placenta-derived adherent stromal cells, placenta-derived decidual stromal cells, endometrial regenerative cells, placental bipotent endothelial/mesenchymal progenitor cells, amniotic membrane or fluid mesenchymal stem cells, amniotic fluid derived progenitors, Wharton's Jelly mesenchymal stem cells, pelvic girdle stem cells, Chorionic Villus Mesenchymal Stromal cells, subcutaneous white adipose mesenchymal stem cells, pericytes, adventitial reticular stem cells, hair follicle-derived stem cells, hematopoietic stem cells, periosteum-derived mesenchymal stem cells, lateral plate mesenchymal stem cells, exfoliated
- the carrier cell is an adipose stromal cell, such as an adipose stromal mesenchymal cell.
- the cells can be supra adventitial-adipose stromal cells (SA-ASC; CD235a ⁇ /CD45 ⁇ /CD34 + /CD146 ⁇ /CD31 ⁇ ), and/or pericytes (CD235a ⁇ /CD45 ⁇ /CD34 ⁇ /CD146 + /CD31 ⁇ ), such as supra adventitial-adipose stromal cells (CD34 + SA-ASC).
- SA-ASC supra adventitial-adipose stromal cells
- CD235a ⁇ /CD45 ⁇ /CD34 + /CD31 ⁇ such as supra adventitial-adipose stromal cells (CD34 + SA-ASC).
- the carrier cells can be selected from among endothelial Progenitor Cells, Placental Endothelial Progenitor cells, Angiogenic Endothelial Cells, and pericytes. Where permitted, the carrier cells can be embryonic epithelial cells.
- the carrier cells can be immune cells.
- Immune cells can be selected from among granulocytes, mast cells, monocytes, dendritic cells, natural killer cells, lymphocytes, T-cell receptor (TCR) transgenic cell targeting tumor-specific antigens, and CAR-T cell targeting tumor-specific antigens.
- TCR T-cell receptor
- the carrier cell is a modified or treated cell from a hematological malignancy cell line.
- malignant cells are treated so that they cannot replicate.
- the carrier cells can be allogeneic to the subject to be treated or they can be autologous. Where allogeneic, they can be treated or sensitized or engineered to avoid or to not be subjected to the treated subject's immune response, and/or matched to the subject to avoid such response for a sufficient time to deliver virus to the tumor.
- the carrier cells can be a cell from a cell line, such as, but not limited to, a human leukemia, T-cell leukemia, myelomonocytic leukemia, lymphoma, non-Hodgkin's lymphoma, Burkitt lymphoma, diffuse large B cell lymphoma, acute myeloid leukemia (AML), chronic myelogenous leukemia (CML), acute lymphoblastic leukemia (ALL), erythroleukemia, myelomonoblastic leukemia, malignant non-Hodgkin's NK Lymphoma, myeloma/plasmacytoma, multiple myeloma and a macrophage cell line.
- a cell line such as, but not limited to, a human leukemia, T-cell leukemia, myelomonocytic leukemia, lymphoma, non-Hodgkin's lymphoma, Burkitt lymphoma, diffuse large B
- a leukemia cell line that is KASUMI-1, HL-60, THP-1, K-562, RS4; 11, MOLT-4, CCRF-CEM, JVM-13, 31E9, ARH-77, MoB, JM1, NALM-1, or ProPak-X.36;
- T cell leukemia cell line that is HM-2, CEM-CM3, Jurkat/Jurkat clone E6-1, J.CaM1.6, BCL2 Jurkat, BCL2 S87A Jurkat, BCL2 S70A Jurkat, Neo Jurkat, BCL2 AAA Jurkat, J.RT3-T3.5, J45.01, J.gamma1, J.gamma1.WT, JK28, P116, P116.c139, A3, JX17, D1.1, I 9.2, or I 2.1;
- a myelomonocytic leukemia cell line that is MV-4-11;
- lymphoma cell line that is HT, BC-3, CA46, Raji, Daudi, GA-10-Clone-4, HH, or H9;
- Non-Hodgkin's Lymphoma cell line that is SU-DHL-1, SU-DHL-2, SU-DHL-4, SU-DHL-5, SU-DHL-6, SU-DHL-8, SU-DHL-10, SU-DHL-16, NU-DUL-1, NCEB-1, EJ-1, BCP-1, TUR, or U-937;
- Burkitt lymphoma cell line that is Ramos/RA 1, Ramos.2G6.4C10, P3HR-1, Daudi, ST486, Raji, CA46, human gamma-herpesvirus 4/HHV-4 cheek tumor from Burkitt Lymphoma Patient, DG-75, GA-10, NAMALWA, HS-Sultan, Jiyoye, NC-37, 20-B8, EB2, 1G2, EB1, EB3, 2B8, GA-10 clone 20, or HKB-11/Kidney-B cell Hybrid;
- a mantle Cell Lymphoma cell line that is JeKo-1, JMP-1, PF-1, JVM-2, REC-1, Z-138, Mino, or MAVER-1;
- an AML cell line that is AML-193, BDCM, KG-1, KG-1a, Kasumi-6, or HL-60/S4;
- a CML cell line that is K562, K562-r, K562-s, LAMA84-r, LAMA84-s, AR230-r, or AR230-s;
- an ALL cell line that is N6/ADR, RS4; 11, NALM6 clone G5, Loucy, SUP-B15, or CCRF-SB;
- an erythroleukemia cell line that is an IDH2-mutant-TF-1 Isogenic cell line
- a myelomonoblastic leukemia cell line that is GDM-1;
- NK Lymphoma cell line that is NK-92, or NK-92 MI;
- a Myeloma/Plasmacytoma cell line that is U266B1/U266, HAA1, SA13, RPMI-8226, NCI-H929, or MC/CAR;
- a multiple myeloma cell line that is MM.1R, IM-9, or MM.1S;
- a macrophage cell line that is MD, SC, or WBC264-9C.
- the carrier cells can be a modified or treated cell selected from among:
- APCETH-201 APCETH-201
- APCETH-301 APCETH-301
- Cx601 TIGENIX
- TEMCELL MSC-100-IV
- MEOBLAST Prochymal stem cell line
- iPSC induced pluripotent stem cell
- fibroblast cell line that is CCD-16Lu or WI-38;
- a tumor-associated fibroblast cell line that is Malme-3 M, COLO 829, HT-144, Hs 895.T, hTERT or PF179T CAF; or
- an endothelial cell line that is HUVEC, HUVEC/TERT 2 or TIME; or an embryonic epithelial cell line that is HEK-293, HEK-293 STF, 293T/17, 293T/17 SF, or HEK-293.2 sus; or
- an embryonic stem cell line that is hESC BG01V;
- an epithelial cell line that is NuLi-1, ARPE-19, VK2/E6E7, Ect1/E6E7, RWPE-2, WPE-stem, End1/E6E7, WPMY-1, NL20, NL20-TA, WT 9-7, WPE1-NB26, WPE-int, RWPE2-W99, or BEAS-2B.
- the carrier cells can be a modified or treated cell from a cell line that is a human hematological malignancy cell line.
- the carrier cells can be a modified or treated cell from a human tumor cell line.
- Cell lines include, but are not limited to, a cell line selected from an NCI-60 panel, a fibrosarcoma, a hepatocarcinoma, a prostate cancer, a breast cancer, a head and neck cancer, a lung cancer, a pancreatic cancer, an ovarian cancer, a colon cancer, a gastric cancer, a gynecological cancer, a sarcoma, a melanoma, a squamous cell carcinoma, a hepatocellular carcinoma, a bladder cancer, a renal cell carcinoma, an embryonal carcinoma, a testicular teratoma, a glioblastoma, an astrocytoma, a thyroid carcinoma, or a mesothelioma cell line.
- the carrier cells can be a modified or treated cell from a GM-CSF whole tumor cell vaccine (GVAX).
- GVAX GM-CSF whole tumor cell vaccine
- the GVAX can be modified or treated as described herein so that it does not induce an anti-viral response or other immune response for a sufficient time to deliver the virus to the tumors.
- Exemplary GVAXs include, GVAX prostate; GVAX pancreas; GVAX lung; or GVAX renal cell, each modified or treated as described herein.
- the oncolytic virus can be any known to those of skill in the art. Included are oncolytic viruses selected from among new castle disease virus, parvovirus, measles virus, reovirus, vesicular stomatitis virus (VSV), adenovirus, poliovirus, herpes simplex virus (HSV), poxvirus, coxsackie virus (CXV) and Seneca Valley virus (SVV).
- the oncolytic virus is a vaccinia virus, such as, but not limited to, a smallpox vaccine.
- Exemplary vaccinia viruses include those derived from a Lister strain, Western Reserve (WR) strain, Copenhagen (Cop) strain, Bern strain, Paris strain, Tashkent strain, Tian Tan strain, Wyeth strain (DRYVAX), IHD-J strain, IHD-W strain, Brighton strain, Ankara strain, CVA382 strain, Dairen I strain, LC16m8 strain, LC16 M0 strain, modified vaccinia Ankara (MVA) strain, ACAM strain, WR 65-16 strain, Connaught strain, New York City Board of Health (NYCBH) strain, EM-63 strain, NYVAC strain, Lister strain LIVP, JX-594 strain, GL-ONC1 strain, and vvDD TK mutant strain with deletions in VGF and TK (see, e.g., McCart et al. (2001) Cancer Res. 61:8751-8757).
- the vaccinia virus can be ACAM2000 or ACAM1000.
- the viruses can be oncolytic adenovirus, such as, for example, ONYX-015, CG00070, Oncorin (H101), ColoAd1, ONCOS-102, or Delta24-RGD/DNX-2401.
- the virus can be a modified HSV-1 virus, or a measles virus.
- the oncolytic viruses can be modified to express a heterologous gene product and/or to have increased tumorigenicity and/or to have reduced toxicity (increased attenuation).
- the viruses can encode a detectable marker for detection in culture or in a subject.
- the marker can be a fluorescent protein, such as Turbo-Red or GFP.
- the carrier cells can be sensitized or treated, or engineered, to achieve, enhance or improve (compared to virus not sensitized, treated or engineered) one or more of: virus amplification in the cell, blocking the induction of an anti-viral state in a subject or in the tumor microenvironment, immune suppression/immune evasion, protection against allogeneic inactivation/rejection determinants, and/or protection against complement.
- carrier cells sensitized or engineered to enhance or improve virus amplification; or sensitized or treated or engineered to block induction of an anti-viral state in the subject or in the tumor microenvironment; or treated, sensitized or engineered to enhance virus amplification by pre-treatment or treatment with one or more of a cytokine or growth factor.
- the carrier cells can be treated to inhibit, or modified to express an inhibitor of, interferon- ⁇ and/or interferon- ⁇ .
- the agent and cell instead of treating the cells with an agent, can be co-administered to the host.
- Exemplary of carrier cells sensitized to enhance virus amplification are those sensitized by pre-treatment or treatment to load the cell with one or more of IL-10, TGF ⁇ , VEGF, FGF-2, PDGF, HGF, IL-6, GM-CSF, a RTK/mTOR agonist, a Wnt protein ligand, and a GSK3 inhibitor/antagonist.
- Exemplary of carrier cells that have been sensitized to block induction of an anti-viral state are those sensitized by pre-treatment or treatment to load the cell with one or more small molecule or protein inhibitors that interfere with IFN Type I/Type II receptors, interfere with downstream IFN signaling, interfere with IFNAR1/IFNAR2 signaling, interfere with IFNGR1/IFNGR2 signaling, interfere with STAT1/2 signaling, interfere with Jak1 signaling, interfere with Jak2 signaling, interfere with IRF3 signaling, interfere with IRF7 signaling, interfere with IRF9 signaling, interfere with TYK2 signaling, interfere with TBK1 signaling, or interfere with other signaling pathways that effect an immune response against the oncolytic virus in the cell or subject.
- Exemplary of cells sensitized to block induction of an anti-viral state are those sensitized by pre-treatment or treatment to load the cell with one or more HDAC inhibitors, for interfering with/deregulating IFN signaling/responsiveness.
- HDAC inhibitors include, but are not limited to, those selected from among vorinostat, romidepsin, chidamide, panobinostat, belinostat, valproic acid, mocetinostat, abexinostat, entinostat, SB939, resminostat, givinostat, quisinostat, HBI-8000, Kevetrin, CUDC-101, AR-42, CHR-2845, CHR-3996, 4SC-202, CG200745, ACY-1215, ME-344, sulforaphane, or trichostatin.
- Exemplary of carrier cells sensitized to block induction of an anti-viral state or enhance virus amplification are those sensitized by pre-treatment or treatment to load the cell with antagonists of virus sensing and/or anti-virus defense pathways.
- Virus sensing and/or defense pathway(s) include those that is/are induced or modulated by one or more of STING, PKR, RIG-1, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, and DAI (ZBP1).
- Antagonists that affect one or more of these pathways include, for example, one or more of K1, E3L, and K3L vaccinia proteins; NS1/NS2 influenza proteins; hepatitis C NS3-4A; arenavirus NP and Z proteins; Ebola virus VP35; HSV US11, ICP34.5 and ICP0; MCMV M45; and Borna disease virus X protein.
- Exemplary of carrier cells that have been sensitized to protect them against inactivation/rejection determinants are those sensitized by pre-treatment or treatment to load the cell with one or more viral major histocompatibility (MEW) antagonists.
- MHC antagonists include those selected from among one or more of A40R WWI antagonist from vaccinia; Nef and TAT from HIV; E3-19K from adenovirus; ICP47 from HSV 1 and HSV2; CPXV012 and CPXV203 from Cowpox; ORF66 from varicella zoster virus (VZV); EBNA1, BNLF2a, BGLF5, and BILF1 from Epstein Barr virus (EBV); US2/gp24, US3/gp23, US6/gp21, US10, and US11/gp33 from human cytomegalovirus (hCMV); Rh178/VIHCE from rhesus CMV (RhCMV); U21 from human herpes virus-6 (HHV6) or
- Exemplary of carrier cells that have been sensitized to enhance immune suppression/immune evasion are those sensitized by pre-treatment or treatment to load the cell with immunosuppressing factors of viral origin.
- Exemplary of such factors is/are one or more of an inhibitor of immune FAS/TNF/granzyme B-induced apoptosis, an IL-1/NFkB/IRF3 antagonist, an IL-1 and toll-like receptor (TLR) antagonist, an IL-1 ⁇ antagonist, a TNF ⁇ blocker, an IFN ⁇ / ⁇ blocker, and an IFN ⁇ blocker.
- Exemplary of carrier cells that have been sensitized to enhance immune suppression/immune evasion are those sensitized by pre-treatment or treatment to load the cell with one or more small molecule inhibitor(s) of one or more of antigen peptide transporter-1/2 (TAP-1 and TAP-2) and tapasin.
- TAP-1 and TAP-2 antigen peptide transporter-1/2
- the carrier cells also can be sensitized to protect against complement. This can be effected, for example, by pre-treatment or treatment to load the cell with an antibody or small molecule or other inhibitor of a complement protein.
- Complement proteins that can be targeted include C3 and C5. As described above and below, and exemplified herein, there are numerous known inhibitors of C3 and C5, including antagonist antibodies specific for each, and small molecule inhibitors.
- the carrier cells generally are pre-treated with the agent that sensitizes or protects. Pre-treatment can be effected for 15 min to 48 hours before viral infection, after viral infection, or before administration to the subject, or before storage.
- the carrier cells also can be sensitized or engineered for extended survival and improved local immunosuppression to reduce or limit virus-mediated killing.
- Agents for effecting this include agonist(s), such as of one or more of STING, PKR, RIG-I, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, and DAI (ZBP1), which can be engineered for expression by the cell or virus under control of a promoter that appropriately times expression, or by administration to the subject, so that the carrier cells are not killed too soon by virus, but are not killed or inhibited by the host's immune system before delivering virus to the tumors.
- agonist(s) such as of one or more of STING, PKR, RIG-I, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, and DAI (ZBP1)
- the carrier cells provided herein also can be engineered for improved viral amplification and/or immunomodulation. This can be effected, for example, by one or more of: a) engineering to prevent or to be unresponsive to an interferon-induced antiviral state; b) engineering to evade allogeneic recognition by one or more of T and NKT cells and/or adaptive immune responses of ⁇ T cells; c) engineering to evade allogeneic recognition by NK Cells and/or innate immune responses of ⁇ T cells; d) engineering to express immunosuppressive factors of human or viral origin to prevent/inhibit allogeneic anti-carrier cell or anti-viral immune responses; e) engineering to express cancer or stem cell-derived factors that facilitate viral infection of otherwise non-permissive carrier cells and/or tumor cells; and f) engineering to express factors interfering with the function of complement and/or neutralizing antibodies.
- the carrier cells can be engineered to prevent or to be unresponsive to an interferon-induced antiviral state by transient or permanent suppression of IFN Type I/Type II receptors and/or downstream signaling, wherein permanent suppression can be effected by deleting the locus that is suppressed.
- Suppression can be effected by suppression of one or more of Type I/Type II interferon receptor expression, IFN ⁇ / ⁇ receptor expression, IFN ⁇ receptor expression, IFNAR1/IFNAR2 receptor expression, IFNGR1/IFNGR2 receptor expression, STAT1/2 receptor expression, Jak1/2 receptor expression, IRF3 receptor expression, IRF7 receptor expression, IRF9 receptor expression, TYK2 kinase expression, and TBK1 kinase expression.
- the carrier cells can be engineered to prevent or to be unresponsive to an interferon-induced antiviral state by transient or permanent suppression of elements of the cytosolic viral DNA/RNA-sensing and anti-viral defense machinery. This can be effected by suppression of one or more of STING, PKR, RIG-1, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, and DAI (ZBP1).
- the carrier cells can be a) engineered to prevent or to be unresponsive to an interferon-induced antiviral state by transient or permanent expression of antagonists of virus-sensing and anti-viral defense pathways mediated by STING, PKR, RIG-1, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, DAI (ZBP1).
- Antagonists include, but are not limited to, one or more of K1, E3L, and K3L vaccinia proteins; NS1/NS2 influenza proteins; hepatitis C NS3-4A; arenavirus NP and Z proteins; Ebola virus VP35; HSV US11, ICP34.5 and ICP0; MCMV M45; and Borna disease virus X protein.
- the carrier cells can be engineered to evade allogeneic recognition by one or more of T and NKT cells and/or adaptive immune responses of ⁇ T cells.
- This can be effected, for example by either or both of: (i) transient or permanent suppression of one or more of: MHC Class I molecules, MHC Class II molecules, MHC-like molecules, and regulators of transcription or expression of MHC Class I, MHC Class II, and MHC-like molecules; and/or (ii) transient or permanent expression of B2 M antagonists of viral origin and/or MHC antagonists of viral origin.
- Transient or permanent suppression of one or more of MHC Class I molecules can be effected for example, by permanent or transient suppression of HLA-A, B, and/or C; transient or permanent suppression of one or more of MHC Class II molecules is effected by suppression of one or more of HLA-DP, DQ and DR; transient or permanent suppression of one or more of MHC-like molecules is effected by suppression of CD1a/b/c/d; transient or permanent suppression of one or more of regulators of transcription or expression of MHC Class I, MHC Class II, and MHC-like molecules is effected by suppression of one or more of TAP1/2, Tapasin, Beta-2 microglobulin, CIITA, RFXANK, RFX5 and RFXAP.
- Transient or permanent suppression of B2 M and/or MHC can be effected, for example, by transient or permanent expression of one or more of B2 M antagonists of viral origin selected from UL18 from hCMV, and one or more of MHC antagonists selected from among one or more of A40R MHCI antagonist from vaccinia; Nef and TAT from HIV; E3-19K from adenovirus; ICP47 from HSV 1 and HSV2; CPXV012 and CPXV203 from Cowpox; ORF66 from varicella zoster virus (VZV); EBNA1, BNLF2a, BGLF5, and BILF1 from Epstein Barr virus (EBV); US2/gp24, US3/gp23, US6/gp21, US10, and US11/gp33 from human cytomegalovirus (hCMV); Rh178/VIHCE from rhesus CMV (RhCMV); U21 from human herpes virus-6 or HHV7; L
- the carrier cells can be engineered to evade allogeneic recognition by NK cells and/or innate immune responses of ⁇ T cells by either or both: (i) transient or permanent suppression of: membrane-bound MICAS or membrane-bound PVR, or membrane-bound Nectin-2, wherein permanent suppression can be effected by deleting the locus; and (ii) transient or permanent expression of: antagonists of MIC-A and MIC-B, antagonists of the NKG2D receptor, antagonists of NCR, ligands for the NK inhibitory receptors (KIR), and ligands for the NK inhibitory receptors NKG2a/CD94.
- transient or permanent suppression of: membrane-bound MICAS or membrane-bound PVR, or membrane-bound Nectin-2, wherein permanent suppression can be effected by deleting the locus and
- the carrier cells can be engineered to evade allogeneic recognition by NK cells and/or innate immune responses of ⁇ T cells by either or both of: (i) transient or permanent suppression of NKG2D ligands and/or DNAM-1 ligands; and (ii) transient or permanent expression of the antagonist of MIC-A and MIC-B, kK5 (from Kaposi's sarcoma virus (KHSV)); the antagonist of the NKG2D receptor Cowpox OMCP; the antagonists of NCR targeting NKp30, NKp44, NKp46 receptors, hemagglutinin (HA from vaccinia and other viruses); ligands for the NK inhibitory receptors (KIR) selected from HLA-Bw4 and HLA-C2; and ligands for the NK inhibitory receptors (NKG2a/CD94) selected from HLA-E and derivatives alone or combined with 21 M HLA-B ligands to generate HLA-
- the carrier cells can be engineered to express immunosuppressive factors of human or viral origin to prevent/inhibit allogeneic anti-carrier cell or anti-viral immune responses. This can be effected, for example, by engineering the carrier cells to express immunosuppressive factors of human or viral origin to prevent/inhibit allogeneic anti-cell vehicle or anti-viral immune responses.
- Factors of human origin include, but are not limited to, one or more of: IDO, Arginase, TRAIL, iNOS, IL-10, TGF ⁇ , VEGF, FGF-2, PDGF, HGF, IL-6, sMICA, sMICB, sHLA-G, HLA-E, PD-L1, FAS-L, B7-H4, and single-chain antibodies (scFv) that target or deplete NK and/or NKT cells, and/or ⁇ T cells.
- Factors of viral origin include, but are not limited to, one or more of: ectromelia/vaccinia virus SPI-2/CrmA (inhibitor of immune FAS/TNF/Granzyme B induced apoptosis), Vaccinia Virus encoded N1 (IL-1/NFkB/IRF3 antagonist), HA (NCR antagonists targeting NKp30, NKp44, NKp46), IL-18 binding protein, A40R, A46R, A52R, B15R/B16R, TNF ⁇ blockers (e.g., Vaccinia virus CmrC/CmrE), IFN ⁇ / ⁇ blockers (e.g., Vaccinia virus B18R/B19R), IFN ⁇ blockers (e.g., Vaccinia virus B8R), and other IL-1/IL-1 ⁇ /NF ⁇ B/IRF3/NCR/MHCI/TLR/NKG2D antagonists.
- the carrier cells can be engineered to express cancer or stem cell-derived factors that facilitate viral infection of otherwise non-permissive (impermissive) carrier cells and/or tumor cells.
- This can be effected, for example, by engineering the carrier cells to express cancer or stem cell-derived factors that facilitate viral infection of otherwise non-permissive (impermissive) cell vehicles and/or tumor cells, wherein the factors are selected from among one or more growth factors and cytokines that facilitate viral infection.
- Exemplary factors include, but are not limited to, one or more of cancer associated antigens, oncofetal antigens, oncogene/tumor suppressors, differentiation antigens, GM-CSF, IL-10, TGF ⁇ , VEGF, FGF-2, PDGF, HGF, IL-6, RTK/mTOR agonists and Wnt protein ligands.
- the carrier cells can be engineered to express factors interfering with the function of complement and/or neutralizing antibodies. This can be effected, for example, by engineering carrier cells to express factors interfering with the function of complement and/or neutralizing antibodies selected from protein antagonists of a complement protein and/or an antibody that inhibits a complement protein.
- factors interfering with the function of complement and/or neutralizing antibodies include, but are not limited to, protein antagonists of complement factors (e.g., complement proteins C1, C2, C3, C4, C5, MBL), vaccinia virus complement control protein (VCP), vaccinia virus complement inhibitor (B5R), scFv anti-CD1q/CD1r/CD1s, anti-C3 antibodies, anti-C5 antibodies (e.g., Eculizumab), peptidic C3 inhibitors of the compstatin family (e.g., Cp40), human soluble membrane (s/m) proteins (e.g., s/mCR1 (CD35), s/mCR2 (CD21), s/mCD55, s/mCD59), human Factor H and derivatives, and cobra venom factors and derivatives with complement inhibitory activity.
- complement factors e.g., complement proteins C1, C2, C3, C4, C5, MBL
- VCP vaccinia virus complement control protein
- modified cell vehicles or carrier cells that include, one or more modifications selected from among: a) sensitization of the cell vehicle to enhance virus amplification ability; b) sensitization of the cell vehicle to block induction of anti-viral responses and/or to improve immune evasion/immune suppression; c) protection of the cell vehicle against allogeneic inactivation and/or rejection by the subject; d) protection of the cell vehicle against complement; and/or e) rendering the cell vehicle resistant to virus-mediated killing.
- carrier cells engineered for: a) transient or permanent expression or suppression of a gene that renders the cell vehicle unresponsive to an interferon-induced antiviral response; b) transient or permanent expression or suppression of a gene to facilitate evading allogeneic recognition by T cells and NKT cells, and ⁇ T cells; c) transient or permanent expression or suppression of a gene to facilitate evading allogeneic recognition by NK cells; d) transient or permanent expression of immunosuppressive factors; e) transient or permanent expression of factors that facilitate viral association with the cell vehicle; and f) transient or permanent expression of factors that interfere with the function of complement and/or neutralizing antibodies.
- Further modifications can include one or more of: a) sensitization of the cell vehicle to enhance virus amplification ability; b) sensitization of the cell vehicle to block induction of anti-viral responses and/or to enhance immune suppression/immune evasion of the cell vehicle; c) protection of the cell vehicle against allogeneic inactivation and/or rejection by the subject; d) protection of the cell vehicle against complement; and/or e) rendering the cell vehicle resistant to virus-mediated killing.
- any of the carrier cells containing oncolytic virus provided herein can be used in methods of treatment comprising administering the carrier cells to a subject who has cancer. Also provided are uses of the cells for treatment of cancer. Administration can be systemic or local, and can be parenteral, such as intravenous.
- the cancers include solid tumors and hematologic malignancies, and include metastatic cancer.
- the carrier cells can be allogeneic or autologous to the subject. When allogeneic, the carrier cells can be matched to the subject. In particular, matching can be effected by methods described below.
- a carrier cell is: a cell in which the virus can replicate; and a cell that has been treated or modified or both to enhance the immunosuppressive properties or immunoprivilaged properties of the cell, and/or has been treated or modified to enhance amplification of the virus in the cell, whereby the cell overcomes innate/adaptive immune barriers of the subject to deliver virus to the tumor.
- the carrier cells include any described herein.
- Subjects for treatment include animals, particularly mammals, including pets, zoo animals, and farm animals, and humans.
- Non-humans include, for example, dogs, cats, horses, pigs, cows, goats, and non-human primates, such as chimpanzees, gorillas, bonobos, and baboons.
- the methods of treatment and uses of the carrier cells include those in which the carrier cells comprising oncolytic virus are administered to a subject who has cancer, where: the carrier cells are allogeneic to the subject and have been matched to the subject; and a carrier cell is: a cell in which the virus can replicate; and a cell that has been treated or modified or both to enhance the immunosuppressive properties or immunoprivilaged properties of the cell, and/or has been treated or modified to enhance amplification of the virus in the cell, whereby the cell overcomes innate/adaptive immune barriers of the subject to deliver virus to the tumor.
- the methods of treatment and uses of the carrier cells include those in which the carrier cells comprising oncolytic virus are administered to a subject who has cancer, where the carrier cells are allogeneic to the subject and have been matched to the subject. Matching can be effected by the methods herein.
- carrier cells for treatment of cancer wherein: the carrier cell comprises an oncolytic virus; the carrier cell matches or has been matched to the subject; and a carrier cell is: a cell in which the virus can replicate; and a cell that has been treated or modified or both to enhance the immunosuppressive properties or immunoprivilaged properties of the cell, and/or has been treated or modified to enhance amplification of the virus in the cell, whereby the cell overcomes innate/adaptive immune barriers of the subject to deliver virus to the tumor.
- the carrier cells comprise an oncolytic virus; the carrier cells match or have been matched to the subject; and the carrier cells are any described herein.
- the carrier cells can be autologous or allogeneic. When allogeneic, they can be matched to the subject, such as by the methods of matching described herein.
- Cancers that can be treated by the carrier cells, methods, and uses provided herein, include solid tumors, hematologic malignancies, and metastatic cancers.
- the cancers include, but are not limited to, those selected from among leukemias, lymphomas, melanomas, carcinomas, sarcomas, myelomas, and neuroblastomas.
- cancers include, but are not limited to, pancreatic cancer, lung cancer, ovarian cancer, breast cancer, cervical cancer, bladder cancer, prostate cancer, brain cancer, central nervous system cancer, adenocarcinomas, liver cancer, skin cancer, hematological cancers, biliary tract cancer, bone cancer, choriocarcinoma, colon and rectal cancers, connective tissue cancer, cancer of the digestive system, endometrial cancer, esophageal cancer, eye cancer, head and neck cancer, gastric cancer, intra-epithelial neoplasm, kidney cancer, larynx cancer, oral cavity cancer, retinoblastoma, rhabdomyosarcoma, cancer of the respiratory system, stomach cancer, testicular cancer, thyroid cancer, uterine cancer, and urinary system cancers.
- pancreatic cancer lung cancer, ovarian cancer, breast cancer, cervical cancer, bladder cancer, prostate cancer, brain cancer, central nervous system cancer, adenocarcinomas, liver cancer, skin cancer, hematological cancer
- Hodgkin's lymphoma Hodgkin's lymphoma, non-Hodgkin's lymphomas, colon cancer, basal cell carcinoma, small cell lung cancer, non-small cell lung cancer, cancer of the lip, cancer of the tongue, cancer of the mouth, gliomas, and cancer of the pharynx.
- the carrier cells can be treated or modified to have improved viral amplification properties and/or to have enhanced immunosuppressive or immune privileged properties.
- the carrier cells can be sensitized by pretreatment with factors that promote viral amplification and/or immunosuppressive or immune privileged properties of the carrier cells.
- the carrier cells can be engineered to improve their virus amplification potential.
- the carrier cells with virus can be administered with or sequentially or after administration of carrier cells, not infected with virus, that first is pretreated with IFN-gamma, and is administered or used prior to administration of the carrier cell comprising virus or concurrently with the carrier cell comprising virus.
- the carrier cells, methods and uses provided herein can be used in combination therapies with another anti-cancer agent or treatment with another anti-cancer therapy, such as radiation therapy and/or surgery.
- further anti-cancer agents or treatments include, but are not limited to, immune costimulation agonists, BiTEs, CAR-T cells and TCR transgenic T cell targeting tumor-specific antigens, checkpoint inhibitors, chemotherapeutic compounds/antibodies, and immunosuppressive drugs.
- Further anti-cancer agents include, but are not limited to, immunotherapy and/or an immunosuppressive drug.
- anti-cancer agents or treatments include, but are not limited to, those selected from among the B7 family (CD28, ICOS); the TNFR family selected from among 4-1BB, OX40, GITR, CD40, CD30 and CD27; LIGHT; LT-alpha; checkpoint inhibitors that target one or more of PD-1, PD-2, PD-L1, PD-L2, CTLA-4, IDO 1 and 2, CTNNB1 ( ⁇ -catenin), SIRP ⁇ , VISTA, LIGHT, HVEM, LAG3, TIM3, TIGIT, Galectin-9, KIR, GITR, TIM1, TIM4, CEACAM1, CD27, CD40/CD40L, CD48, CD70, CD80, CD86, CD112, CD137(4-1BB), CD155, CD160, CD200, CD226, CD244 (2B4), CD272 (BTLA), B7-H2, B7-H3, B7-H4, B7-H6, ICOS, A2aR, A2b
- the carrier cells when allogeneic, can be matched to the subject to whom they are to be administered or to whom they are administered. Methods of matching also are provided.
- the carrier cells can be matched to immune cells from the subject to whom the cell is administered to identify a carrier cell that is sufficiently immunologically compatible to immune cells from the subject to deliver virus to the subject. Also, the carrier cells can be matched with a virus, wherein the ability of the cell to amplify virus is measured.
- the cell/virus combination also can be matched to the subject. Immune cell from the subject include, for example, peripheral blood mononuclear cells (PBMCs).
- PBMCs peripheral blood mononuclear cells
- the method of matching can include testing ability of the virus to replicate in the cell and/or the ability of the cell to promote viral amplification.
- the methods and uses and cells include methods of matching where the ability of the virus to replicate in the cell and/or the ability of the cell to promote viral amplification is tested by co-culturing the cell and a virus and measuring the rate of viral amplification.
- the ability of the virus to replicate in the cell and/or the ability of the cell to promote viral amplification is measured by, for example: a) measuring rates of virus amplification using a multiplicity of infection (MOI) of at or about 0.01-10, and co-culturing for periods of 1 day to about or at 1 week (24 h-1 week) under equivalent assay conditions; and b) normalizing against the number of infected cell carriers, where: normalized Pfu per cell values measured under equivalent assay conditions can be used to compute a virus amplification score (VAS), which is for ranking a carrier cell + virus combination as suitable (or not) for therapy; a plaque forming units (pfu) per carrier cell value of 1-10 is considered limited potency (as a cell carrier for a particular virus
- the carrier cell/virus combination is matched to the subject to be treated by a) assessing patient-specific genetic polymorphism to identify MHC I/II haplotype, KIR haplotype and ligands, and non-classical MHC Haplotype, including one or more of HLA-E, CD1a,b,c,d, MICA/B; b) comparing the genetic polymorphism profile of the subject with the profile of the available carrier cells to identify from among carrier cells, cells most compatible with the subject; c) assessing the compatibility of the carrier cells and subject immune cells by co-culturing the cells, virus and immune cells; and d) assessing the level of viral amplification.
- method of matching can further include: e) measuring carrier cell+live tumor biopsy +/ ⁇ virus by detecting vehicle-directed migration of tumor cells and virus amplification, to identify carrier cells/virus for administration, where: viral amplification in the subject tumor biopsy + cell vehicles is either: 5% or more greater than the sum of viral amplification in the tumor biopsy alone under equivalent conditions + viral amplification in the cell vehicles alone under equivalent conditions; or is at least 5% or more greater than viral amplification in the tumor biopsy alone under equivalent conditions.
- the method of matching can further include analyzing co-culture to assess subject permissivity to the carrier cell-mediated virotherapy by culturing subject-derived PBMCs+carrier cell + virus.
- the methods, uses, cells can include: measuring viral amplification in co-cultures of subject-derived PMBCs+carrier cell+virus, where a match is: compatible if virus amplification in the co-cultures of carrier cell and patient PBMC is in excess of 80% of the virus amplification when the same carrier cell is infected in the absence of PBMC; moderately compatible if virus amplification in the co-cultures of carrier cell and patient PBMC is in the range of 30-80% of the virus amplification when the same carrier cell is infected in the absence of PBMC; minimally compatible if virus amplification in the co-cultures of carrier cell and patient PBMC is in the range of 10-30% of the virus amplification when the same carrier cell is infected in the absence of PBMC; incompatible if virus amplification in
- carrier cells methods, including the matching methods, and uses herein, where a match between carrier cell and the subject by selecting a cell vehicle (carrier cell) as suitable for delivery of an oncolytic virus to a subject having cancer is effected by a method, comprising identifying one or more of the following determinants (a)-(f) as indicative of a match between the cell vehicle (carrier cell) and the subject:
- the cell vehicle and the subject have identical alleles at 50% or more of the following genetic loci combined:
- an immunological viral amplification score representing the amount of viral amplification in the presence of immune cells obtained from the subject relative to the amount of viral amplification obtained under equivalent conditions except in the absence of immune cells obtained from the subject, is at least 20%;
- an immunological compatibility score representing the immune response in the presence of the cell vehicle relative to the immune response under equivalent conditions except in the absence of the cell vehicle, is ⁇ 200%, wherein the immune response is determined by the amount of expression of one or more of the following:
- the cell vehicle when the cell vehicle is incubated in a co-culture with the oncolytic virus and immune cells obtained from the subject, the cell vehicle does not augment an anti-viral immune response and/or suppresses an anti-viral immune response relative to identical conditions except in the absence of the cell vehicle, as measured by an immunological suppression score (ISS) of ⁇ 0% according to the equation:
- identifying a match between the cell vehicle and the subject identifying a match between the cell vehicle and the subject and selecting the cell vehicle as suitable for delivery of an oncolytic virus to the subject having cancer.
- the method can include: determining a viral amplification score (VAS) as the Pfu/cell when the cell vehicle is incubated with the virus; and if the VAS score is at least 10, selecting the cell vehicle for screening using one or more of the determinants (a)-(f) and identifying whether there is a match between the cell vehicle and the subject.
- VAS viral amplification score
- the matching methods can be multiplexed for a panel of possible carrier cells to rank them based on the effectiveness for, or delivery of, an oncolytic virus to a subject, wherein a rank of 1 is the most desirable, highest rank and larger numbers represent less desirable ranks, by a multiplexed method comprising:
- the multiplexed method can further comprise:
- VAS viral amplification score
- the ICS score and/or the ISS score is/are obtained based on measuring marker expression in the cell co-culture.
- the ICS score and/or the ISS score can be obtained based on measuring marker expression in the supernatants of the co-culture(s); and/or the IVAS score corrected for the effect of the subject's serum on viral amplification by a method comprising: (i) to the co-culture of d), adding serum from the subject in an amount of between 10-50% by weight (or v/v) of the co-culture volume; (ii) computing a Subject Serum Resistance Score (SSRS) according to the formula:
- IVAS (SSRS corrected) IVAS ⁇ (1-SSRS) ⁇ 100.
- Methods of selecting a cell vehicle as suitable for delivery of an oncolytic virus to a subject having cancer are provided.
- the methods include identifying one or more of the following determinants (a)-(f) as indicative of a match between the cell vehicle and the subject:
- the cell vehicle and the subject have identical alleles at 50% or more of the following genetic loci combined:
- an immunological viral amplification score representing the amount of viral amplification in the presence of immune cells obtained from the subject relative to the amount of viral amplification obtained under equivalent conditions except in the absence of immune cells obtained from the subject, is at least 20%;
- an immunological compatibility score representing the immune response in the presence of the cell vehicle relative to the immune response under equivalent conditions except in the absence of the cell vehicle, is ⁇ 200%, wherein the immune response determined by the amount of expression of one or more of the following:
- the cell vehicle when the cell vehicle is incubated in a co-culture with the oncolytic virus and immune cells obtained from the subject, the cell vehicle does not augment an anti-viral immune response and/or suppresses an anti-viral immune response relative to identical conditions except in the absence of the cell vehicle, as measured by an immunological suppression score (ISS) of ⁇ 0% according to the equation:
- identifying a match between the cell vehicle and the subject identifying a match between the cell vehicle and the subject and selecting the cell vehicle as suitable for delivery of an oncolytic virus to the subject having cancer.
- the method of matching can further include, prior to one or more of a)-f): determining a viral amplification score (VAS) as the Pfu/cell when the cell vehicle is incubated with the virus; and if the VAS score is at least 10, selecting the cell vehicle for screening using one or more of the determinants (a)-(f) and identifying whether there is a match between the cell vehicle and the subject.
- VAS viral amplification score
- compositions containing any of the carrier cells provided herein in a pharmaceutically acceptable vehicle.
- the pharmaceutical compositions are for use for treating cancer and in methods of treating cancers as described above, and, below.
- the compositions can be administered systemically, locally, intratumorally, intrahepatically, intravenously, rectally or subcutaneously.
- the carrier cells can be matched to the subject by the methods of matching described herein or any other such methods.
- the methods include steps of: determining whether the cell vehicle overcomes immune barriers in the subject by detecting, in a co-culture of the cell vehicle, the oncolytic virus and cells, such as PMBC, from the subject, one or more of: (a) a reduced level of one or more markers for T cell activation compared to otherwise equivalent conditions except the cell vehicle is not present; (b) a reduced level of one or more markers for NK cell activation compared to otherwise equivalent conditions except the cell vehicle is not present; and (c) a reduced level of one or more markers for NKT cell activation compared to otherwise equivalent conditions except the cell vehicle is not present. If one or more of (a), (b) and (c) is/are satisfied, the cell vehicle is a match for the subject.
- Also provided are methods of matching a subject having cancer with a cell vehicle for delivery of an oncolytic virus for treatment of the subject that include the steps of: (a) measuring the amount of viral amplification obtained when the virus and the cell vehicle are incubated together with cells from the subject; (b) measuring the amount of viral amplification obtained when the virus and the cell vehicle are incubated under equivalent conditions, except in the absence of cells from the subject; and (c) comparing the amounts measured in (a) and (b), wherein the cell vehicle is a match for treating the subject if the amount of amplification measured in (a) is at least 20% of the amount of amplification measured in (b).
- These methods of matching can further include identifying identical alleles, where at least 10% of the alleles in the cell vehicle and the subject are identical.
- the alleles are one or more major histocompatibility complex (MHC) and/or killer cell inhibitory receptor (KIR) genetic loci.
- MHC major histocompatibility complex
- KIR killer cell inhibitory receptor
- methods comprising: identifying identical alleles at major histocompatibility complex (MHC) and/or killer cell inhibitory receptor (KIR) genetic loci in the cell vehicle and the subject; and if at least 50% of the alleles are identical, selecting the cell vehicle as a match for the subject.
- MHC major histocompatibility complex
- KIR killer cell inhibitory receptor
- the methods comprise: determining whether the cell vehicle overcomes immune barriers in the subject by detecting, in a co-culture comprising the cell vehicle, the oncolytic virus and cells from the subject, a level of expression of one or more immunological markers that is ⁇ 200% the level of expression detected under equivalent conditions except in the absence of the cell vehicle, wherein the markers are selected from among one or more of: (1) markers for T cell activation; (2) markers for NK cell activation; and (3) markers for NKT cell activation, wherein if the expression level of at least one marker selected from among (1), (2) and (3) in the co-culture is ⁇ 200% the level of expression detected under equivalent conditions except in the absence of the cell vehicle, the cell vehicle is a match for the subject.
- This methods can further include identifying at least one of the alleles at major histocompatibility complex (MHC) and/or killer cell inhibitory receptor (KIR) genetic loci as being identical in the cell vehicle and the subject, where if at least one of the loci is identical and the level of expression of one or more immunological markers in the co-culture is ⁇ 200% the level of expression detected under equivalent conditions except in the absence of the cell vehicle, the cell vehicle is a match for the subject.
- MHC major histocompatibility complex
- KIR killer cell inhibitory receptor
- any of the methods of matching described herein can be performed to identify carrier cells that are provided herein for administration to a particular subject.
- the carrier cells are allogeneic to the subject.
- a “virus” refers to any of a large group of infectious entities that cannot grow or replicate without a host cell. Viruses typically contain a protein coat surrounding an RNA or DNA core of genetic material, but no semipermeable membrane, and are capable of growth and multiplication only in living cells.
- Viruses include, but are not limited to, poxviruses, herpesviruses, adenoviruses, adeno-associated viruses, lentiviruses, retroviruses, rhabdoviruses, papillomaviruses, vesicular stomatitis virus, measles virus, Newcastle disease virus, picornavirus, Sindbis virus, papillomavirus, parvovirus, reovirus, coxsackievirus, influenza virus, mumps virus, poliovirus, Seneca Valley Virus, and semliki forest virus.
- oncolytic viruses refer to viruses that replicate selectively in tumor cells in tumorous subjects. Some oncolytic viruses can kill a tumor cell following infection of the tumor cell. For example, an oncolytic virus can cause death of the tumor cell by lysing the tumor cell or inducing cell death of the tumor cell.
- a therapeutic virus refers to a virus that is administered for the treatment of a disease or disorder, such as a neoplastic disease, such as cancer, a tumor and/or a metastasis or inflammation or wound or diagnosis thereof and or both.
- a therapeutic virus herein is one that exhibits anti-tumor activity and minimal toxicity.
- vaccinia virus or “VACV” or “VV” denotes a large, complex, enveloped virus belonging to the poxvirus family. It has a linear, double-stranded DNA genome approximately 190 kbp in length, which encodes approximately 200 proteins.
- Vaccinia virus strains include, but are not limited to, strains of, derived from, or modified forms of Western Reserve (WR), Copenhagen (Cop), Bern, Paris, Tashkent, Tian Tan, Lister, Wyeth, IHD-J, IHD-W, Brighton, Ankara, modified vaccinia Ankara (MVA), CVA382, Dairen I, LIPV, LC16 M8, LC16 M0, LIVP, ACAM, WR 65-16, Connaught, JX-594, GL-ONC1, vvDD TK mutant, New York City Board of Health (NYCBH), EM-63, and NYVAC vaccinia virus strains.
- WR Western Reserve
- Copenhagen Copenhagen
- Copenhagen Copenhagen
- Tashkent Tashkent
- Tian Tan Tian Tan
- Lister Lister
- Wyeth Wyeth
- IHD-J IHD-J
- IHD-W IHD-W
- Brighton Brighton
- Ankara modified vaccinia Ankara
- LAV Lister Strain of the Institute of Viral Preparations
- LIVP virus strain refers to a virus strain that is the attenuated Lister strain (ATCC Catalog No. VR-1549) that was produced by adaption to calf skin at the Institute of Viral Preparations, Moscow, Russia (Al'tshtein et al. (1985) Dokl. Akad. Nauk USSR 285:696-699).
- the LIVP strain can be obtained, for example, from the Institute of Viral Preparations, Moscow, Russia (see. e.g., Kutinova et al.
- LIVP virus strain encompasses any virus strain or virus preparation that is obtained by propagation of an LIVP through repeat passage in cell lines.
- modified virus refers to a virus that is altered compared to a parental strain of the virus.
- modified viruses have one or more truncations, mutations, insertions or deletions in the genome of virus.
- a modified virus can have one or more endogenous viral genes modified and/or one or more intergenic regions modified.
- exemplary modified viruses can have one or more heterologous nucleic acid sequences inserted into the genome of the virus.
- Modified viruses can contain one or more heterologous nucleic acid sequences in the form of a gene expression cassette for the expression of a heterologous gene.
- carrier cell used interchangeably with “cell vehicle,” “carrier vehicle,” cell-based delivery vehicle” and “cell-based vehicle” refers to any cell that can be or is infected with virus or otherwise associated with virus, such as through chemical or physical interaction between the virus and a surface protein, or by infection of the cytoplasm or nucleus of the cell with the virus.
- “sensitized” or “sensitizing a cell” to alter a property of the cell refers to treating the cell by treatment, generally before use, with an agent to modify a property of the cell, such as by inducing expression of a gene.
- a match between a particular cell carrier (also referred to herein as a cell vehicle) and a subject with cancer to be treated with the carrier cell and virus means that the cell carrier is sufficiently compatible with the immune system of the host to evade the subject's immune system to deliver virus to a tumor in the subject.
- Assays to identify matched carrier cells matched to a subject to be treated are provided herein.
- the carrier cell also can be matched to a virus, where a matched virus can replicate in the cell.
- a matched carrier cell with virus is a match for administration to a subject if the virus amplifies/replicates in the cell and the cell delivers virus to a tumor in the subject.
- Assays to select carrier cell/virus combinations also are provided herein.
- amplification of a virus in a carrier cell means that the virus replicates in the cell to sustain the virus or increase the amount of virus in the cell.
- a “host cell” or “target cell” are used interchangeably to mean a cell that can be infected by a virus.
- tissue refers to a group, collection or aggregate of similar cells generally acting to perform a specific function within an organism.
- therapeutic gene product or “therapeutic polypeptide” or “therapeutic agent” refers to any heterologous protein expressed by the therapeutic virus that ameliorates the symptoms of a disease or disorder or ameliorates the disease or disorder.
- Therapeutic agents include, but are not limited to, moieties that inhibit cell growth or promote cell death, that can be activated to inhibit cell growth or promote cell death, or that activate another agent to inhibit cell growth or promote cell death.
- the therapeutic agent can exhibit or manifest additional properties, such as, properties that permit its use as an imaging agent, as described elsewhere herein.
- Exemplary therapeutic agents include, for example, cytokines, growth factors, photosensitizing agents, radionuclides, toxins, anti-metabolites, signaling modulators, anti-cancer antibiotics, anti-cancer antibodies, angiogenesis inhibitors, chemotherapeutic compounds or a combination thereof.
- therapeutic agents are agents that ameliorate the symptoms of a disease or disorder or ameliorate the disease or disorder.
- Therapeutic agent, therapeutic compound, or therapeutic regimens include conventional drugs and drug therapies, including vaccines for treatment or prevention (i.e., reducing the risk of getting a particular disease or disorder), which are known to those skilled in the art and described elsewhere herein.
- Therapeutic agents for the treatment of neoplastic disease include, but are not limited to, moieties that inhibit cell growth or promote cell death, that can be activated to inhibit cell growth or promote cell death, or that activate another agent to inhibit cell growth or promote cell death.
- Therapeutic agents for use in the methods provided herein can be, for example, an anticancer agent.
- therapeutic agents include, for example, therapeutic microorganisms, such as therapeutic viruses and bacteria, cytokines, growth factors, photosensitizing agents, radionuclides, toxins, antimetabolites, signaling modulators, anticancer antibiotics, anticancer antibodies, angiogenesis inhibitors, radiation therapy, chemotherapeutic compounds or a combination thereof.
- therapeutic microorganisms such as therapeutic viruses and bacteria, cytokines, growth factors, photosensitizing agents, radionuclides, toxins, antimetabolites, signaling modulators, anticancer antibiotics, anticancer antibodies, angiogenesis inhibitors, radiation therapy, chemotherapeutic compounds or a combination thereof.
- a tumor cell or cancer cell refers to a cell that divides and reproduces abnormally because growth and division are not regulated or controlled, i.e. cells that are susceptible to uncontrolled growth.
- a tumor cell can be a benign or malignant cell.
- the tumor cell is a malignant cell that can spread to other parts of the body, a process known as metastasis.
- a virus preparation or virus composition refers to a virus composition obtained by propagation of a virus strain, for example a vaccinia virus strain, a vaccinia virus clonal strain or a modified or recombinant virus strain, in vivo or in vitro in a culture system.
- a vaccinia virus preparation refers to a viral composition obtained by propagation of a virus strain in host cells, typically upon purification from the culture system using standard methods known in the art.
- a virus preparation generally is made up of a number of virus particles or virions.
- the number of virus particles in the sample or preparation can be determined using a plaque assay to calculate the number of plaque forming units per sample unit volume (pfu/mL), assuming that each plaque formed is representative of one infective virus particle.
- Each virus particle or virion in a preparation can have the same genomic sequence compared to other virus particles (i.e., the preparation is homogenous in sequence) or can have different genomic sequences (i.e., the preparation is heterogeneous in sequence).
- plaque forming unit or infectious unit (IU) refers to the number of infectious or live viruses. It thus reflects the amount of active virus in the preparation.
- the pfu can be determined using a virus plaque assay (plaque formation assay) or an end-point dilution assay, which are standard assays known to one of skill in the art.
- a nanoparticle refers to a colloidal particle for delivery of a molecule or agent that is microscopic in size of between or about between 1 and 1000 nanometers (nm), such as between 1 and 100 nm and behave as a whole unit in terms of transport and properties. Nanoparticles include those that are uniform in size. Nanoparticles include those that contain a targeting molecule attached to the outside.
- targeting molecule or “targeting ligand” refers to any molecular signal directing localization to specific cells, tissues or organs.
- targeting ligands include, but are not limited to, proteins, polypeptides or portions thereof that bind to cell surface molecules, including, but not limited to, proteins, carbohydrates, lipids or other such moieties.
- targeting ligands include proteins or portions thereof that bind to cell surface receptors or antibodies directed to antigens expressed selectively on a target cell.
- Targeting ligands include, but are not limited to growth factors, cytokines, adhesion molecules, neuropeptides, protein hormones and single-chain antibodies (scFv).
- antibody e.g., antibody directed to an antigen expressed on an immune cell population such as, for example, T cells, ⁇ (gd) T cells, NK cells, NKT cells to be depleted or inhibited for suppression of an immune response
- antibody includes full-length antibodies and portions thereof including antibody fragments.
- Antibody fragments include, but are not limited to, Fab fragments, Fab′ fragments, F(ab′)2 fragments, Fv fragments, disulfide-linked Fvs (dsFv), Fd fragments, Fd′ fragments, single-chain Fvs (scFv), single-chain Fabs (scFab), diabodies, anti-idiotypic (anti-Id) antibodies, or antigen-binding fragments of any of the above.
- Antibody also includes synthetic antibodies, recombinantly produced antibodies, multispecific antibodies (e.g., bispecific antibodies), human antibodies, non-human antibodies, humanized antibodies, chimeric antibodies, and intrabodies.
- Antibodies provided herein include members of any immunoglobulin type (e.g., IgG, IgM, IgD, IgE, IgA and IgY), any class (e.g., IgG1, IgG2, IgG3, IgG4, IgA1 and IgA2) or subclass (e.g., IgG2a and IgG2b).
- immunoglobulin type e.g., IgG, IgM, IgD, IgE, IgA and IgY
- any class e.g., IgG1, IgG2, IgG3, IgG4, IgA1 and IgA2
- subclass e.g., IgG2a and IgG2b.
- Antibodies such as monoclonal antibodies, can be prepared using standard methods known to those with skill in the art (see, e.g., Kohler et al., Nature 256:495-497 (1975); Kohler et al., Eur. J. Immunol. 6:511-519 (1976); and WO 02/46455).
- an animal is immunized by standard methods to produce antibody-secreting somatic cells. These cells then are removed from the immunized animal for fusion to myeloma cells.
- Somatic cells that can produce antibodies, particularly B cells can be used for fusion with a myeloma cell line. These somatic cells can be derived from the lymph nodes, spleens and peripheral blood of primed animals.
- myeloma cell lines have been developed from lymphocytic tumors for use in hybridoma-producing fusion procedures (Kohler and Milstein, Eur. J. Immunol. 6:511-519 (1976); Shulman et al., Nature, 276:269-282 (1978); Volk et al., J. Virol., 42:220-227 (1982)). These cell lines have three useful properties. The first is they facilitate the selection of fused hybridomas from unfused and similarly indefinitely self-propagating myeloma cells by having enzyme deficiencies that render them incapable of growing in selective medium that support the growth of hybridomas.
- the second is they have the ability to produce antibodies and are incapable of producing endogenous light or heavy immunoglobulin chains.
- a third property is they efficiently fuse with other cells.
- Other methods for producing hybridomas and monoclonal antibodies are well known to those of skill in the art. It is routine to produce antibodies against any polypeptide, e.g., antigenic marker on an immune cell population.
- Exemplary immune cell depleting antibodies include, but are not limited to:
- a delivery vehicle for administration refers to a lipid-based or other polymer-based composition, such as liposome, micelle or reverse micelle, that associates with an agent, such as a virus provided herein, for delivery into a host subject.
- accumulation of a virus in a particular tissue refers to the distribution or colonization of the virus in particular tissues of a host organism after a time period following administration of the virus to the host, long enough for the virus to infect the host's organs or tissues.
- the time period for infection of a virus will vary depending on the virus, the organ(s) or tissue(s) to be infected, the immunocompetence of the host, and the dosage of the virus.
- accumulation can be determined at time points from about less than 1 day, about 1 day to about 2, 3, 4, 5, 6 or 7 days, about 1 week to about 2, 3 or 4 weeks, about 1 month to about 2, 3, 4, 5, 6 months or longer after infection with the virus.
- the viruses preferentially accumulate in immunoprivilaged tissue, such as inflamed tissue or tumor tissue, but are cleared from other tissues and organs, such as non-tumor tissues, in the host to the extent that toxicity of the virus is mild or tolerable and at most, not fatal.
- preferential accumulation refers to accumulation of a virus at a first location at a higher level than accumulation at a second location (i.e., the concentration of viral particles, or titer, at the first location is higher than the concentration of viral particles at the second location).
- a virus that preferentially accumulates in immunoprivilaged tissue tissue that is sheltered from the immune system
- immunoprivilaged tissue tissue that is sheltered from the immune system
- inflamed tissue and tumor tissue
- tumor tissue refers to a virus that accumulates in immunoprivileged tissue, such as a tumor, at a higher level (i.e., concentration or viral titer) than the virus accumulates in normal tissues or organs.
- activity refers to the in vitro or in vivo activities of a compound or virus provided herein.
- in vivo activities refer to physiological responses that result following in vivo administration of a compound or virus provided herein (or of a composition or other mixture thereof).
- Activity thus, encompasses resulting therapeutic effects and pharmaceutical activity of such compounds, compositions and mixtures. Activities can be observed in in vitro and/or in vivo systems designed to test or use such activities.
- anti-tumor activity or “anti-tumorigenic” refers to virus strains that prevent or inhibit the formation or growth of tumors in vitro or in vivo in a subject. Anti-tumor activity can be determined by assessing a parameter or parameters indicative of anti-tumor activity.
- anti-tumor activity with reference to anti-tumor activity or anti-tumorigenicity means that a virus strain is capable of preventing or inhibiting the formation or growth of tumors in vitro or in vivo in a subject to a greater extent than a reference or control virus or to a greater extent than absence of treatment with the virus. Whether anti-tumor activity is “greater” or “improved” can be determined by assessing the effect of a virus and, if necessary, a control or reference virus, on a parameter indicative of anti-tumor activity.
- the amount of virus (e.g., pfu) used in an in vitro assay or administered in vivo is the same or similar, and the conditions (e.g., in vivo dosage regimen) of the in vitro assay or in vivo assessment are the same or similar.
- toxicity refers to the deleterious or toxic effects to a host upon administration of the virus.
- an oncolytic virus such as vaccinia virus
- the toxicity of a virus is associated with its accumulation in non-tumorous organs or tissues, which can impact the survival of the host or result in deleterious or toxic effects.
- Toxicity can be measured by assessing one or more parameters indicative of toxicity. These include accumulation in non-tumorous tissues and effects on viability or health of the subject to whom it has been administered, such as effects on body weight.
- reduced toxicity means that the toxic or deleterious effects upon administration of the virus to a host are attenuated or lessened compared to a host not treated with the virus or compared to a host that is administered with another reference or control virus. Whether toxicity is reduced or lessened can be determined by assessing the effect of a virus and, if necessary, a control or reference virus, on a parameter indicative of toxicity.
- the amount of virus (e.g., pfu) used in an in vitro assay or administered in vivo is the same or similar and the conditions (e.g., in vivo dosage regimen) of the in vitro assay or in vivo assessment are the same or similar.
- the subjects are the same species, size, gender and the virus is administered in the same or similar amount under the same or similar dosage regimen.
- a virus with reduced toxicity can mean that upon administration of the virus to a host, such as for the treatment of a disease, the virus does not accumulate in non-tumorous organs and tissues in the host to an extent that results in damage or harm to the host, or that impacts survival of the host to a greater extent than the disease being treated does or to a greater extent than a control or reference virus does.
- a virus with reduced toxicity includes a virus that does not result in death of the subject over the course of treatment.
- control refers to a sample that is substantially identical to the test sample, except that it is not treated with a test parameter, or, if it is a plasma sample, it can be from a normal volunteer not affected with the condition of interest.
- a control also can be an internal control.
- a control can be a sample, such as a virus, that has a known property or activity.
- dosing regimen refers to the amount of agent, for example, a carrier cell or virus or other agent, administered, and the frequency of administration over the course of a cycle of administration.
- agent for example, a carrier cell or virus or other agent
- the dosing regimen is a function of the disease or condition to be treated, and thus can vary.
- frequency of administration refers to the number of times an agent is administered during the cycle of administration.
- frequency can be days, weeks or months.
- frequency can be administration once during a cycle of administration, two times, three times, four times, five times, six times or seven times.
- the frequency can refer to consecutive days during the cycle of administration.
- the particular frequency is a function of the particular disease or condition treated.
- a “cycle of administration” refers to the repeated schedule of the dosing regimen of administration of a virus that is repeated over successive administrations.
- an exemplary cycle of administration is a 28 day cycle.
- immunoprivileged cells and immunoprivileged tissues refer to cells and tissues, such as solid tumors, which are sequestered from the immune system. Generally, administration of a virus to a subject elicits an immune response that clears the virus from the subject. Immunoprivileged sites, however, are shielded or sequestered from the immune response, permitting the virus to survive and generally to replicate. Immunoprivileged tissues include proliferating tissues, such as tumor tissues and other tissues and cells involved in other proliferative disorders, wounds and other tissues involved in inflammatory responses.
- a wound or lesion refers to any damage to any tissue in a living organism.
- the tissue can be an internal tissue, such as the stomach lining or a bone, or an external tissue, such as the skin.
- a wound or lesion can include, but is not limited to, a gastrointestinal tract ulcer, a broken bone, a neoplasia, and cut or abraded skin.
- a wound or lesion can be in a soft tissue, such as the spleen, or in a hard tissue, such as bone.
- the wound or lesion can have been caused by any agent, including traumatic injury, infection or surgical intervention.
- a tumor also known as a neoplasm, is an abnormal mass of tissue that results when cells proliferate at an abnormally high rate. Tumors can show partial or total lack of structural organization and functional coordination with normal tissue. Tumors can be benign (not cancerous), or malignant (cancerous). As used herein, a tumor is intended to encompass hematopoietic tumors as well as solid tumors.
- Carcinomas are malignant tumors arising from epithelial structures (e.g., breast, prostate, lung, colon, and pancreas).
- Sarcomas are malignant tumors that originate from connective tissues, or mesenchymal cells, such as muscle, cartilage, fat or bone.
- Leukemias and lymphomas are malignant tumors affecting hematopoietic structures (structures pertaining to the formation of blood cells), including components of the immune system.
- Other malignant tumors include, but are not limited to, tumors of the nervous system (e.g., neurofibromatomas), germ cell tumors, and blastic tumors.
- a resected tumor refers to a tumor in which a significant portion of the tumor has been excised.
- the excision can be effected by surgery (i.e., a surgically resected tumor).
- the resection can be partial or complete.
- a disease or disorder refers to a pathological condition in an organism resulting from, for example, infection or genetic defect, and characterized by identifiable symptoms.
- An exemplary disease as described herein is a neoplastic disease, such as cancer.
- a cell involved in a disease or disease process refers to cells whose presence contributes to, exacerbates, causes or otherwise is involved in the etiology of a disease or disease process. Inhibition or killing of such cells can ameliorate the symptoms of the disease or can ameliorate the disease. Examples of such cells are tumor cells. Killing or inhibiting the growth or proliferation of tumor cells effects treatment of tumors. Other examples are immune effector cells, which participate in inflammatory responses that contribute to the pathology of a variety of diseases. Inhibiting or killing immune effector cells can treat diseases that have an inflammatory component.
- killing or inhibiting growth or proliferation of cells means that the cells die or are eliminated. Inhibiting growth or proliferation means that the number of such cells does not increase, and can decrease.
- a “tumor cell” is any cell that is part of a tumor.
- carrier cells provided herein preferentially home to tumor cells and the viruses provided herein preferentially infect tumor cells in a subject compared to normal cells.
- a “metastatic cell” is a cell that has the potential for metastasis. Metastatic cells have the ability to metastasize from a first tumor in a subject and can colonize tissue at a different site in the subject to form a second tumor at the site.
- tumorigenic cell is a cell that, when introduced into a suitable site in a subject, can form a tumor.
- the cell can be non-metastatic or metastatic.
- a “normal cell” is a cell that is not derived from a tumor.
- neoplastic disease refers to any disorder involving cancer, including tumor development, growth, metastasis and progression.
- cancer is a term for diseases caused by or characterized by any type of malignant tumor, including metastatic cancers, lymphatic tumors, and blood cancers.
- Exemplary cancers include, but are not limited to, acute lymphoblastic leukemia, acute lymphoblastic leukemia, acute myeloid leukemia, acute promyelocytic leukemia, adenocarcinoma, adenoma, adrenal cancer, adrenocortical carcinoma, AIDS-related cancer, AIDS-related lymphoma, anal cancer, appendix cancer, astrocytoma, basal cell carcinoma, bile duct cancer, bladder cancer, bone cancer, osteosarcoma/malignant fibrous histiocytoma, brainstem glioma, brain cancer, carcinoma, cerebellar astrocytoma, cerebral astrocytoma/malignant glioma, ependymoma, medulloblastoma, supratentorial primitive neuroectodermal tumor
- epidermoid carcinoma epidermoid carcinoma, esophageal cancer, Ewing's sarcoma, extracranial germ cell tumor, extragonadal germ cell tumor, extrahepatic bile duct cancer, eye cancer/intraocular melanoma, eye cancer/retinoblastoma, gallbladder cancer, gallstone tumor, gastric/stomach cancer, gastrointestinal carcinoid tumor, gastrointestinal stromal tumor, giant cell tumor, glioblastoma multiforme, glioma, hairy-cell tumor, head and neck cancer, heart cancer, hepatocellular/liver cancer, Hodgkin lymphoma, hyperplasia, hyperplastic corneal nerve tumor, in situ carcinoma, hypopharyngeal cancer, intestinal ganglioneuroma, islet cell tumor, Kaposi's sarcoma, kidney/renal cell cancer, laryngeal cancer, leiomyoma tumor, lip and oral cavity cancer, liposarcoma, liver cancer, non-
- Exemplary cancers commonly diagnosed in humans include, but are not limited to, cancers of the bladder, brain, breast, bone marrow, cervix, colon/rectum, kidney, liver, lung/bronchus, ovary, pancreas, prostate, skin, stomach, thyroid, or uterus.
- Exemplary cancers commonly diagnosed in dogs, cats, and other pets include, but are not limited to, lymphosarcoma, osteosarcoma, mammary tumors, mastocytoma, brain tumor, melanoma, adenosquamous carcinoma, carcinoid lung tumor, bronchial gland tumor, bronchiolar adenocarcinoma, fibroma, myxochondroma, pulmonary sarcoma, neurosarcoma, osteoma, papilloma, retinoblastoma, Ewing's sarcoma, Wilm's tumor, Burkitt's lymphoma, microglioma, neuroblastoma, osteoclastoma, oral neoplasia, fibrosarcoma, osteosarcoma and rhabdomyosarcoma, genital squamous cell carcinoma, transmissible venereal tumor, testicular tumor, seminoma, Sertoli cell tumor, heman
- Exemplary cancers diagnosed in rodents include, but are not limited to, insulinoma, lymphoma, sarcoma, neuroma, pancreatic islet cell tumor, gastric MALT lymphoma and gastric adenocarcinoma.
- Exemplary neoplasias affecting agricultural livestock include, but are not limited to, leukemia, hemangiopericytoma and bovine ocular neoplasia (in cattle); preputial fibrosarcoma, ulcerative squamous cell carcinoma, preputial carcinoma, connective tissue neoplasia and mastocytoma (in horses); hepatocellular carcinoma (in swine); lymphoma and pulmonary adenomatosis (in sheep); pulmonary sarcoma, lymphoma, Rous sarcoma, reticulo-endotheliosis, fibrosarcoma, nephroblastoma, B-cell lymphoma and lymphoid leukosis (in avian species); retinoblastoma, hepatic neoplasia, lymphosarcoma (lymphoblastic lymphoma), plasmacytoid leukemia and swimbladder sarcoma
- a “metastasis” refers to the spread of cancer from one part of the body to another.
- malignant cells can spread from the site of the primary tumor in which the malignant cells arose and move into lymphatic and blood vessels, which transport the cells to normal tissues elsewhere in an organism where the cells continue to proliferate.
- a tumor formed by cells that have spread by metastasis is called a “metastatic tumor,” a “secondary tumor” or a “metastasis.”
- an anticancer agent or compound refers to any agent or compound used in anticancer treatment. These include any agents, when used alone or in combination with other compounds or treatments, that can alleviate, reduce, ameliorate, prevent, or place or maintain in a state of remission of clinical symptoms or diagnostic markers associated with neoplastic disease, tumors and cancer, and can be used in methods, combinations and compositions provided herein.
- Anticancer agents include antimetastatic agents.
- anticancer agents include, but are not limited to, chemotherapeutic compounds (e.g., toxins, alkylating agents, nitrosoureas, anticancer antibiotics, antimetabolites, antimitotics, topoisomerase inhibitors), cytokines, growth factors, hormones, photosensitizing agents, radionuclides, signaling modulators, anticancer antibodies, anticancer oligopeptides, anticancer oligonucleotides (e.g., antisense RNA and siRNA), angiogenesis inhibitors, radiation therapy, or a combination thereof.
- chemotherapeutic compounds e.g., toxins, alkylating agents, nitrosoureas, anticancer antibiotics, antimetabolites, antimitotics, topoisomerase inhibitors
- cytokines cytokines
- growth factors hormones
- photosensitizing agents e.g., radionuclides
- signaling modulators e.g., anticancer antibodies,
- chemotherapeutic compounds include, but are not limited to, Ara-C, cisplatin, carboplatin, paclitaxel, doxorubicin, gemcitabine, camptothecin, irinotecan, cyclophosphamide, 6-mercaptopurine, vincristine, 5-fluorouracil, and methotrexate.
- reference to an anticancer or chemotherapeutic agent includes combinations or a plurality of anticancer or chemotherapeutic agents unless otherwise indicated.
- a subject includes any organism, including an animal for whom diagnosis, screening, monitoring or treatment is contemplated. Animals include mammals such as primates and domesticated animals.
- An exemplary primate is a human.
- a patient refers to a subject, such as a mammal, primate, human, or livestock subject afflicted with a disease condition or for which a disease condition is to be determined or risk of a disease condition is to be determined.
- a patient refers to a human subject exhibiting symptoms of a disease or disorder.
- treatment of a subject that has a condition, disorder or disease means any manner of treatment in which the symptoms of the condition, disorder or disease are ameliorated or otherwise beneficially altered. Treatment encompasses any pharmaceutical use of the viruses described and provided herein.
- treatment of a subject that has a neoplastic disease means any manner of treatment in which the symptoms of having the neoplastic disease are ameliorated or otherwise beneficially altered.
- treatment of a tumor or metastasis in a subject encompasses any manner of treatment that results in slowing of tumor growth, lysis of tumor cells, reduction in the size of the tumor, prevention of new tumor growth, or prevention of metastasis of a primary tumor, including inhibition of vascularization of the tumor, tumor cell division, tumor cell migration or degradation of the basement membrane or extracellular matrix.
- therapeutic effect means an effect resulting from treatment of a subject that alters, typically improves or ameliorates the symptoms of a disease or condition or that cures a disease or condition.
- a therapeutically effective amount refers to the amount of a composition, molecule or compound which results in a therapeutic effect following administration to a subject.
- amelioration or alleviation of the symptoms of a particular disorder refers to any lessening, whether permanent or temporary, lasting or transient that can be attributed to or associated with administration of the composition.
- efficacy means that upon administration of a virus or virus composition, the virus will colonize proliferating or immunoprivileged cells, such as tumor cells, and replicate. Colonization and replication in tumor cells is indicative that the treatment is or will be an effective treatment.
- effective treatment with a cell carrier/virus is one that can increase survival compared to the absence of treatment therewith.
- a virus is an effective treatment if it stabilizes disease, causes tumor regression, decreases severity of disease or slows down or reduces metastasizing of the tumor.
- an effective amount, or therapeutically effective amount, of a virus or compound for treating a particular disease is an amount to ameliorate, or in some manner reduce the symptoms associated with the disease.
- the amount will vary from one individual to another and will depend upon a number of factors, including, but not limited to, age, weight, the overall physical condition of the patient and the severity of the disease.
- a therapeutically effective amount can be administered as a single dosage or can be administered in multiple dosages according to a regimen, whereby it is effective.
- the amount can cure the disease but, typically, is administered in order to ameliorate the symptoms of the disease. Repeated administration can be required to achieve the desired amelioration of symptoms.
- an effective amount, or therapeutically effective amount, of a virus or compound for treating a neoplastic disease, including a tumor or metastasis is an amount to ameliorate, or in some manner reduce the symptoms associated with the neoplastic disease, including, but not limited to slowing of tumor growth, lysis of tumor cells, reduction in the size of the tumor, prevention of new tumor growth, or prevention of metastasis of a primary tumor.
- composition refers to any mixture of two or more products or compounds. It can be a solution, a suspension, liquid, powder, a paste, aqueous, non-aqueous, or any combination thereof.
- a formulation refers to a composition containing at least one active pharmaceutical or therapeutic agent and one or more excipients.
- a co-formulation refers to a composition containing two or more active or pharmaceutical or therapeutic agents and one or more excipients.
- a combination refers to any association between or among two or more items.
- the combination can be two or more separate items, such as two compositions or two collections, can be a mixture thereof, such as a single mixture of the two or more items, or any variation thereof.
- the elements of a combination are generally functionally associated or related.
- Exemplary combinations include, but are not limited to, two or more pharmaceutical compositions, a composition containing two or more active ingredients, such as two viruses, or a virus and an anticancer agent, such as a chemotherapeutic compound, two or more viruses, a virus and a therapeutic agent, a virus and an imaging agent, a virus and a plurality of therapeutic and/or imaging agents, or any association thereof.
- Such combinations can be packaged as kits.
- direct administration refers to administration of a composition without dilution.
- kits are packaged combinations, optionally, including instructions for use of the combination and/or other reactions and components for such use.
- an “article of manufacture” is a product that is made and sold. As used throughout this application, the term is intended to encompass articles containing a carrier cell and vaccinia virus alone or in combination with a second therapy or a therapeutic energy source contained in the same or separate articles of packaging.
- a device refers to a thing made or adapted for a particular task.
- Exemplary devices herein are devices that cover or coat or are capable of contacting the epidermis or surface of the skin. Examples of such devices include, but are not limited to, a wrap, bandage, bind, dress, suture, patch, gauze or dressing.
- ranges and amounts can be expressed as “about” or “approximately” a particular value or range. “About” or “approximately” also includes the exact amount. Hence, “about 5 milliliters” means “about 5 milliliters” and also “5 milliliters.” Generally “about” includes an amount that would be expected to be within experimental error.
- “about the same” means within an amount that one of skill in the art would consider to be the same or to be within an acceptable range of error. For example, typically, for pharmaceutical compositions, within at least 1%, 2%, 3%, 4%, 5% or 10% is considered about the same. Such amounts can vary depending upon the tolerance for variation in the particular composition by subjects.
- allogeneic cells are cells that are genetically different with respect to a particular subject because they are derived from a genetically different individual of the same species.
- allogeneic stem cells are stem cells that are derived from a donor other than the patient (or identical twin).
- autologous cells are cells obtained from the same individual, for example, the subject to be treated (i.e., the patient).
- autologous stem cells are stem cells that are derived from the patient.
- the term “engineered,” with respect to cell vehicles or carrier cells, denotes the genetic modification of the cells, such that they express proteins that can improve or enhance the performance of the cells.
- cells can be engineered for improved viral amplification and/or improved immunomodulation.
- immunomodulation refers to any process in which an immune response is modified to a desired level, for example by inducing, enhancing or suppressing an immune response.
- immune suppression or “immunosuppression” refers to the suppression or reduction of the immune response.
- immunoprivileged refers to cells or tissues that do not elicit an immune response and can evade the immune system.
- Immunoprivileged cells and tissues refer to cells and tissues, such as solid tumors and the tumor microenvironment, which are sequestered from the immune system by virtue of immunosuppressive properties of tumors.
- oncolytic viruses preferentially accumulate in tumors in the tumor microenvironment because they are shielded from the immune system.
- Immunoprivileged tissues and cells are shielded or sequestered from the immune response, permitting the viruses to survive and generally to replicate.
- oncolytic viruses refer to viruses that replicate selectively in tumor cells.
- disease or disorder refers to a pathological condition in an organism resulting from, e.g., infection or genetic defect, and characterized by identifiable symptoms.
- cancer is a general term for diseases caused by or characterized by any type of malignant tumor or hematological malignancy, such as a leukemia.
- malignant as applies to tumors, refers to primary tumors that have the capacity of metastasis with loss of growth control and positional control.
- metastasis refers to a growth of abnormal or neoplastic cells distant from the site primarily involved by the morbid process.
- an anti-cancer agent or compound refers to any agents or compounds used in anti-cancer treatment. These include any agents, when used alone or in combination with other compounds, that can alleviate, reduce, ameliorate, prevent, or place or maintain in a state of remission of clinical symptoms or diagnostic markers associated with neoplastic disease, tumors and cancer, and can be used in methods, combinations and compositions provided herein.
- resistant with respect to viral infection refers to a cell that is not infected, or is infected to a very low degree, with a virus upon exposure to the virus.
- transmissive with respect to viral infection refers to a cell that is readily infected upon exposure to the virus.
- a “haplotype” is a set of DNA variations or polymorphisms that are inherited together, and can refer to a group of alleles or a set of single nucleotide polymorphisms (SNPs) located on the same chromosome.
- a “matched haplotype” denotes an immunological compatibility between the haplotype of the donor and the haplotype of the recipient or patient, such that the haplotype of the donor is sufficiently compatible with the immune system of the recipient or patient to evade the recipient's immune system.
- a “mismatched haplotype” denotes an immunological incompatibility between the haplotype of the donor and the haplotype of the recipient or patient, such that the haplotype of the donor is not sufficiently compatible with the immune system of the recipient or patient and the donor cells cannot evade the recipient's immune system.
- An “immunocompromising mismatch” is defined as a mismatch between the subject and the carrier cells at a genetic polymorphism locus that is associated with a significant (e.g., 10% or more) reduction in the % compatibility as determined by the matching assay methods provided herein.
- immunologically compatible refers to a cell or virus that is sufficiently compatible with the immune system of the subject/host, to evade the subject's immune system for a sufficient time to deliver virus to a tumor or cancerous cell in the subject.
- co-culture refers to a cell culture in which two or more different populations of cells are grown.
- the term “loading,” with respect to cells can refer to the association of a cell with an agent, such as a virus, small molecule, therapeutic agent, antibody etc., through a chemical or physical interaction between the cell and the agent on the surface of the cell or inside the cell.
- an agent such as a virus, small molecule, therapeutic agent, antibody etc.
- adipose-derived stem cells or ADSCs are mesenchymal stem cells that are obtained from the adipose tissue of a donor.
- a peripheral blood mononuclear cell or PBMC is any peripheral blood cell having a round nucleus, for example, lymphocytes, monocytes or macrophages.
- L14 VV is a TK-inserted Turbo-FP635 engineered LIVP strain of vaccinia virus.
- WT1 also called “ACAM2000”
- ACAM2000 is a wild type thymidine kinase (TK)-positive Wyeth strain of vaccinia virus. It is a smallpox vaccine strain that is available from the CDC.
- a virus plaque assay is an assay used to determine the quantity of infectious virus or the viral titer, given as plaque-forming units (pfu) per ml or per sample.
- a “primed” or “protected” cell vehicle or carrier cell is one that has been pre-treated and/or loaded with an agent, such as a cytokine, for example interferon (IFN), or antagonists of allogeneic inactivation/rejection determinants, to protect the cell from the immune response.
- an agent such as a cytokine, for example interferon (IFN), or antagonists of allogeneic inactivation/rejection determinants, to protect the cell from the immune response.
- IFN interferon
- treatment refers to amelioration of the symptoms of a disease or disorder.
- prevention refers to prophylactic treatment to reduce the risk of getting a disease or condition or reducing the severity thereof.
- a subject refers to any mammal that can be treated by the methods and uses herein.
- Mammals include humans, other primates, such as chimpanzees, bonobos, and gorillas, dogs, cats, cows, pigs, goats and other farm animals and pets.
- Patients refer to human subjects.
- Cell Vehicles or “Carrier Cells”.
- Oncolytic viruses have the ability to preferentially infect, accumulate in and kill tumor cells, relative to normal cells. This ability can be a natural feature of the virus (e.g., reovirus, Newcastle disease virus and mumps virus), or the viruses can be genetically attenuated so that they circumvent antiviral immune and other defenses in the subject (e.g., vesicular stomatitis virus, herpes simplex virus, adenovirus) or the preference for tumor cells can be selected for or engineered into the virus using, e.g., tumor-specific cell surface molecules, transcription factors and tissue-specific microRNAs (see, e.g., Cattaneo et al., Nat. Rev.
- oncolytic viruses can be effected via direct intratumoral injection. While direct intratumoral delivery can minimize the exposure of normal cells to the virus, there often are limitations due to, e.g., inaccessibility of the tumor site (e.g., brain tumors) or for tumors that are in the form of several small nodules spread out over a large area.
- Systemic delivery has the potential of the virus reaching not only the primary tumor site, but disseminated metastases as well.
- immunosuppressive drugs such as cyclophosphamide, tacrolimus, mycophenolate mofetil and methylprednisolone sodium succinate
- cyclophosphamide tacrolimus
- tacrolimus mycophenolate mofetil
- methylprednisolone sodium succinate have been used successfully in organ transplantation, but have demonstrated limited success in enhancing the tumoral delivery of systemically administered OVs (Guo et al. (2010) Gene Ther. 17(12):1465-1475; Guo et al. (2010) Gene Ther. 17(12):1465-1475).
- the use of immunosuppressive drugs also can increase the potential toxicity of viruses and, in addition, can reduce any antitumor responses mounted by the immune system that would otherwise aid in oncolysis (Thorne et al. (2010) Molecular Therapy 18(9): 1698-1705).
- carrier cells for the delivery of OVs can mimic the way viruses have evolved to spread within the host.
- the human immunodeficiency virus binds circulating dendritic cells (DCs) and macrophages, which can migrate to the lymph nodes and allow the virus to reach its target: CD4 + T cells.
- DCs dendritic cells
- macrophages which can migrate to the lymph nodes and allow the virus to reach its target: CD4 + T cells.
- viruses that replicate by spreading from cell to cell can successfully evade neutralizing antibodies.
- Clinical trials have shown that oncolytic reovirus, upon i.v. administration, binds circulating cells, retaining its infectivity and reaching tumor cells even in the presence of neutralizing antibodies (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- the advantages of using cell-based vehicles include the specific delivery of OVs to tumor cells, increasing their therapeutic potential and preventing off-target toxicities, and the ability to shield the OVs from pre-existing antiviral immunity.
- Chemokines and adhesion molecules such as integrins play a vital role in the trafficking of cells within the immune system and into tumors. Cancer cells have been shown to secrete a variety of cytokines and chemokines that attract carrier cells to the tumor. Other factors, such as hypoxia also can contribute to the tumor homing abilities of carrier cells.
- OVs can be associated with carrier cells by loading onto the surface of carrier cells via specific or nonspecific interactions, or can be internalized by them. Internalization of the OVs sometimes provides better protection against circulating NAbs and allows for viral replication within the cells, increasing the amount of delivered virus. However, viral infection can kill the carrier cells before they reach their target site(s), preventing the successful delivery of OVs for oncolysis. On the other hand, loading onto the carrier cell surface precludes viral amplification prior to arrival at the tumor site and can reduce the amount of virus that is delivered (Jennings et al. (2014) Int. J. Cancer 134:1091-1101; Willmon et al. (2009) Molecular Therapy 17(10): 1667-1676).
- the effectiveness of a carrier cell for the delivery of an OV relies on several factors, including: (1) successful ex vivo loading of the virus; (2) in vivo accumulation of the virus at the tumor site; and (3) virus amplification/production at the tumor site (Guo et al. (2010) Gene Ther. 17(12):1465-1475).
- the ideal carrier cell not only shields the OV from neutralization by the immune system, but also specifically delivers it to the tumor and possesses antitumor activity of its own.
- the carrier cell should be safe to administer, easy to isolate and/or manufacture, be susceptible to infection by the virus, allow the virus to replicate, and release the virus at the tumor site before being destroyed.
- VSV is a rapidly replicating virus, and successful delivery via carrier cells can be achieved if the cells are injected after 1-2 hours of infection.
- slower replicating viruses such as vaccinia virus, there is more flexibility in optimizing the timing for infection and delivery of the carrier cells (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56). Choosing a compatible virus and carrier cell pair also can ensure that viral replication does not negatively impact the carrier cell's circulation and effector functions, or hinder its tumor trafficking.
- premature viral replication and/or expression can result in the destruction of carrier cells via direct cytotoxicity, or via indirect clearance by the immune system, once the carrier cells have been identified as “infected” (Willmon et al. (2009) Molecular Therapy 17(10):1667-1676).
- viral infection causes the expression of viral antigens on the surface of carrier cells
- tumor-specific and hypoxia-induced promoters can be used to drive viral replication at the tumor site (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- the carrier cell In addition to considerations of virus-carrier cell compatibility with respect to kinetic parameters, as discussed above, the carrier cell, like the associated oncolytic virus, must be able to overcome innate and adaptive immune barriers, while promoting viral amplification in the tumor cells/cancer cells.
- autologous carrier cells cells obtained from the subject to be treated
- Allogeneic carrier cells which can include a variety of readily isolable and/or commercially available cells/cell lines, offer the ease of availability and non-invasiveness to the subject; however, the greater magnitude of the innate and/or adaptive immune responses can compromise their therapeutic efficacy and clinical applicability.
- the methods provided herein permit the screening, identification and selection of “matched” carrier cells that can potentiate viral therapy in a subject-specific and/or cancer-specific manner.
- available potential carrier cell candidates are screened in a manner that identifies carrier cells whose ability to promote amplification of the virus and/or show therapeutic efficacy of the virus in the subject is not significantly compromised by the immune responses of the subject against the carrier cell and/or the carrier cell/virus combination.
- the carrier cells so identified can then be used for subject and/or cancer specific carrier cell-mediated virotherapy, in accordance with the methods of treatment provided herein.
- the methods of selecting carrier cells that are provided herein can be used to screen any cell types that have been used as carrier cells for the delivery of OVs.
- the screened carrier cell types can be ranked based on their ability to promote viral amplification and/or evade immune attack in a particular subject who is to be treated using carrier cell-mediated viral oncotherapy; the higher the ability, the higher the “rank.”
- One or more carrier cell types ranked as “high” are then selected as a match for the particular subject and/or the particular cancer to be treated.
- Methods of treatment using the carrier cell types so selected also are provided herein
- carrier cells A variety of cell types have been used as carrier cells, and any of these can be screened in the methods provided herein.
- the carrier cells can be modified to provide a better “match” for a subject of interest. Then screened and/or modified carrier cells can be used in the methods of treatment provided herein.
- Exemplary carrier cell types for the delivery of OVs which can include, for example, stem/progenitor cells, immune cells and cancer/transformed cells, are described below.
- the carrier cells screened according to the methods provided herein can be autologous, i.e., derived from the subject to be treated, or allogeneic, i.e., derived from a donor other than the subject to be treated.
- Exemplary carrier cells for use in the methods, combinations and compositions provided herein are as follows:
- Stem cells, immune cells and tumor/cancerous cells can be utilized as delivery vehicles for oncolytic viruses (OVs), including HSV-1, parvovirus, measles virus, vesicular stomatitis virus (VSV), vaccinia virus, reovirus, New Castle Disease virus and adenovirus, among others.
- OVs oncolytic viruses
- the delivery vehicles used in the compositions and methods provided herein are isolated and administered as compositions formed by incubating the isolated delivery vehicles/carrier cells with oncolytic viruses; they are not part of a plant or animal.
- the cells can be cultured for use as carriers.
- cytokines and chemokines demonstrate tumor-homing properties, which enhance the therapeutic effect of OVs.
- This tumor selectivity is due to the attraction of these cells to the tumor microenvironment, which is characterized by hypoxia, inflammation and an abundance of chemoattractant molecules, such as cytokines and chemokines.
- Stem cells possess an intrinsic tumor-homing ability, making them attractive as carrier cells for oncolytic virotherapy. This is due to the tumor microenvironment being rich in various growth factors, angiogenic factors, cytokines and chemokines, which support the uncontrolled growth of tumors. The hypoxic nature of the TME also promotes the migration of stem cells towards tumors. Stem cells also are attractive as carrier cells also because they are highly immunosuppressive and express lower levels of the molecules necessary for antigen processing and presentation, delaying the recognition of the viruses they harbor by the immune system (Kim et al. (2015) Viruses 7:6200-6217). Examples of stem cells that can be used as carrier cells for OVs include endothelial progenitor cells, neural stem cells and mesenchymal stem cells.
- Endothelial progenitor cells have been shown to home to sites of tumor neovasculature and have successfully been utilized to delivery oncolytic measles virus in a murine model of human glioma (Guo et al. (2008) Biochim Biophys Acta 1785(2):217-231). These cells divide rapidly in vivo, but are not immortal, and new cells must be repeatedly isolated from clinical samples (Kim et al. (2015) Viruses 7:6200-6217).
- NSCs Neural stem cells
- SDF-1 stromal cell-derived factor-1
- VEGF vascular endothelial growth factor
- uPA urokinase plasminogen activator
- NSCs have been utilized in the delivery of IL-4, IL-12, IL-23, cytosine deaminase, the antiangiogenic protein thrombosponsin and OVs such as adenovirus to gliomas, for example.
- NSCs must be isolated from the brain tissues of fetuses or from the periventricular zone of adult brains during surgery, which is a disadvantage for their utility as carrier cells.
- MSCs mesenchymal stem cells
- MSCs express low levels of MHC class I molecules and do not express MHC class II molecules on their cell surfaces, allowing for allogeneic transplant. MSCs also can inhibit T-cell proliferation and differentiation of monocytes into dendritic cells (DCs), and can suppress the expression of interferon-gamma and tumor necrosis factor produced by CD4+ T-helper cells (Kim et al. (2015) Viruses 7:6200-6217). MSCs also are capable of degrading the extracellular matrix via the secretion of proteases, which can help overcome the physical barriers to oncolytic viral delivery (Ramirez et al. (2015) Oncolytic Virotherapy 4:149-155).
- MSCs can be frozen after viral infection and, upon thawing, retain active viral replication and antitumor activity, allowing for their storage (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- MSCs also can be isolated from adipose tissue, umbilical cord blood, peripheral blood, muscle, cartilage and amniotic fluid, with adipose tissue being the most attractive source, due to the ease of access and abundance of adipose tissue (Kerrigan et al. (2017) Cytotherapy 19(4):445-457; Nakashima et al. (2010) Cytokine Growth Factor Rev. 21(2-3):119-126).
- MSCs have served as carriers of oncolytic adenovirus for the treatment of pancreatic cancer, brain cancer, renal cell carcinoma, glioblastoma, and ovarian cancer, and as carriers of measles virus for the treatment of ovarian cancer and hepatocellular carcinoma (Kim et al. (2015) Viruses 7:6200-6217).
- MSCs have been utilized as carriers of the oncolytic adenovirus ICOVIR-5 for the treatment of children with advanced metastatic neuroblastoma (Kerrigan et al. (2017) Cytotherapy 19(4):445-457; Ramirez et al. (2015) Oncolytic Virotherapy 4:149-155).
- MSCs can be engineered to ensure their destruction upon delivery of the OV, for example, by carrying suicide genes (Kerrigan et al. (2017) Cytotherapy 19(4):445-457).
- stem cells autologous or allogeneic
- carrier cells include: adult stem cells; embryonic stem cells; fetal stem cells; neural stem cells; mesenchymal stem cells (for example, isolated/derived from: adult bone marrow, adipose tissue, blood, dental pulp, neonatal umbilical cord, umbilical cord blood, placenta, placenta-derived adherent stromal cells, placenta-derived decidual stromal cells, endometrial regenerative cells, placental bipotent endothelial/mesenchymal progenitor cells, amniotic membrane or fluid mesenchymal stem cells, amniotic fluid derived progenitors, Wharton's Jelly mesenchymal stem cells, pelvic girdle stem cells, Chorionic Villus Mesenchymal Stromal cells, subcutaneous white adipose mesenchymal stem cells, pericytes, adventitial reticular stem cells, hair follicle-
- Immune cells which respond to “danger signals” released from tumors by trafficking to cancer sites, have been extensively investigated as carrier cells for OVs.
- T cells include T cells, including ⁇ T cells, CAR-T cells targeting tumor-specific antigens, TCR transgenic cells targeting tumor-specific antigens; NKT cells, lymphocytes, monocytes, macrophages, mast cells, granulocytes, dendritic cells (DCs), natural killer (NK) cells, myeloid-derived suppressor cells, lymphokine-activated killer (LAK) cells, and cytokine-induced killer (CIK) cells, for example.
- T cells including ⁇ T cells, CAR-T cells targeting tumor-specific antigens, TCR transgenic cells targeting tumor-specific antigens; NKT cells, lymphocytes, monocytes, macrophages, mast cells, granulocytes, dendritic cells (DCs), natural killer (NK) cells, myeloid-derived suppressor cells, lymphokine-activated killer (LAK) cells
- Immune cells are attractive as carrier cells because they circulate systemically and can recognize tumors (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- the use of immune cells as carriers for OVs can also provide additional antitumor activity in the form of direct cytotoxicity, or by priming adaptive antitumor immune responses (Jennings et al. (2014) Int. J. Cancer 134:1091-1101).
- Tumor antigen-specific T cells display direct anticancer effector functions, and activated T cells have been extensively investigated in the delivery of OVs to tumors. It has been shown that loading adoptively transferred T cells with OVs can help combat the immunosuppressive nature of the tumor microenvironment, because the proinflammatory nature of viral infection can prevent the silencing and inactivation of T cells (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- the intratumoral expression of chemokines such as CCL3, CCL21 and CXCL10 (IP-10) enhances the tumor-specific trafficking of adoptive T cells.
- T cells also can be genetically engineered to express chemokine receptors such as CXCR2, in order to help direct them towards tumors (Guo et al. (2008) Biochim Biophys Acta 1785(2):217-231). Studies have demonstrated that vesicular stomatitis virus, reovirus, herpes simplex virus, Newcastle disease virus, and retrovirus particles can attach to the surface of T cells and be delivered to tumor cells either passively or via cellular synapses between the carrier and tumor cells (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- chemokine receptors such as CXCR2
- T cells as carriers for OV
- it remains very expensive and difficult to raise T-cell populations against highly tumor-specific antigens from patients, limiting their use (Willmon et al. (2009) Molecular Therapy 17(10):1667-1676).
- Lymphokine-activated killer cells have shown promise in combination with IL-2 in the treatment of ovarian cancer.
- Immature dendritic cells (iDCs), LAK cells and their co-cultures (LAKDC) were tested as carriers for reovirus in the treatment for ovarian cancer, and it was shown that reovirus-loaded LAKDC were able to protect the reovirus from neutralizing antibodies, induce a proinflammatory cytokine milieu and generate an innate and adaptive antitumor immune response (Jennings et al. (2014) Int. J. Cancer 134:1091-1101).
- DC cells also have been successfully used as carriers of reovirus for the treatment of melanoma (Jennings et al. (2014) Int. J. Cancer 134:1091-1101).
- CIK cells are another type of immune cell that can be used as carriers for OVs. Whereas tumor antigen-specific T cells recognize one antigen, CIK cells recognize NKG2D ligands, which are often upregulated on a variety of tumor cells, making them more versatile. CIK cells also are easier to isolate from patients and expand ex vivo, can produce high titers of virus, and have successfully been used to deliver measles and vaccinia viruses to tumors (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56; Willmon et al. (2009) Molecular Therapy 17(10):1667-1676; Power and Bell (2007) Mol. Ther. 15(4):660-665).
- One disadvantage to the use of CIK cells is that their generation requires the expansion of primary leukocytes using cytokines in vivo (Kim et al. (2015) Viruses 7:6200-6217).
- Macrophages represent yet another potential class of carrier cells for OVs. Since tumors often secrete monocyte chemotactic protein-1, macrophage colony-stimulating factor and VEGF, monocytes naturally migrate to tumor sites, localizing to hypoxic regions, and differentiating into tumor-associated macrophages, which can enhance tumor growth inhibition (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56). As a result, macrophages have been investigated preclinically for the delivery of oncolytic adenovirus and measles virus. In addition to the other types of immune cells discussed, myeloid-derived suppressor cells also have been investigated as carrier cells for the delivery of oncolytic VSV.
- Cancer cells often inactivated with ⁇ -irradiation before administration for safety, also have successfully been used as carrier cells for OVs.
- the ⁇ -irradiation can prevent tumorigenicity, but preserve viral production.
- Another safety measure involves the engineering of OVs to express suicide genes, such as thymidine kinase, to ensure that the cancer cells do not remain indefinitely in the subject (i.e., are killed and no longer immortal).
- suicide genes such as thymidine kinase
- allogeneic cancer cells which typically are cleared by the recipient's immune system, can be used ((Power and Bell (2007) Mol. Ther. 15(4):660-665).
- Cancer cells can readily be obtained in large amounts and display higher levels of viral infectivity and amplification than normal cells (Guo et al. (2010) Gene Ther. 17(12):1465-1475; Roy and Bell (2013) Oncolytic Virotherapy 2:47-56). Additionally, some tumor cells migrate specifically to certain organs, as is seen with metastatic disease. For example, myeloma cells express high levels of the chemokine receptor CXCR4, resulting in bone marrow metastases, and have been utilized in the delivery of oncolytic measles virus (Roy and Bell (2013) Oncolytic Virotherapy 2:47-56).
- a variety of transformed cell lines have been shown to successfully deliver oncolytic parvovirus, measles virus, and vesicular stomatitis virus in immune-competent as well as immune-deficient animals.
- carcinoma cells infected with VSV or adenovirus have been used to effectively deliver the virus to lung metastases in mice (Willmon et al. (2009) Molecular Therapy 17(10):1667-1676; Power and Bell (2007) Mol. Ther. 15(4):660-665).
- Cells derived from solid tumors have been shown to accumulate in the lungs of mice following IV administration, due to their large diameters.
- cancer cells of hematopoietic/hematological origin can be a better alternative, as they are more widely distributed in the body and can deliver OVs to anatomical locations outside the lungs (Power and Bell (2007) Mol. Ther. 15(4):660-665).
- Examples of allogeneic human hematological malignancy cell lines that can be used as carrier cells include: leukemia cells (such as, for example, KASUMI-1, HL-60, THP-1, K-562, RS4; 11, MOLT-4, CCRF-CEM, JVM-13, 31E9, ARH-77, MoB, JM1, NALM-1, ProPak-X.36); T cell leukemia cells (such as, for example, HM-2, CEM-CM3, Jurkat/Jurkat clone E6-1, J.CaM1.6, BCL2 Jurkat, BCL2 S87A Jurkat, BCL2 S70A Jurkat, Neo Jurkat, BCL2 AAA Jurkat, J.RT3-T3.5, J45.01, J.gamma1, J.gamma1.WT, JK28, P116, P116.c139, A3, JX17, D1.1, I9.2, I2.1); myelomonocytic leukemia cells (for example, MV
- mesenchymal stem cells such as, for example, APCETH-201, APCETH-301 (APCETH), Cx601 (TIGENIX), TEMCELL, MSC-100-IV, Prochymal (MESOBLAST); induced pluripotent stem cells (iPSC), such as, for example, ToleraCyte (Fate Therapeutics); fibroblast cells, for example, CCD-16Lu, WI-38; tumor-associated fibroblasts, for example, Malme-3 M, COLO 829, HT-144, Hs 895.T, hTERT PF179T CAF, etc.; endothelial cells, for example, HUVEC, HUVEC/TERT 2, TIME; embryonic epithelial cells, for example, HEK-293, HEK-293 STF, 293T/17, 293T/17 SF, HEK-293.2 sus; embryonic stem cells, for example, hESC BG01V; and
- Autologous or allogeneic whole tumor cell vaccines include GM-CSF secreting whole tumor cell vaccines (GVAX), such as, for example, GVAX Prostate (PC3/LNCaP-based); GVAX Pancreas; GVAX Lung; and GVAX Renal Cell, etc., from Cell Genesys/BioSante/Aduro Biotech.
- GVAX GM-CSF secreting whole tumor cell vaccines
- Allogeneic human tumor cell lines include, for example, NCI-60 panel (BT549, HS 578T, MCF7, MDA-MB-231, MDA-MB-468, T-47D, SF268, SF295, SF539, SNB-19, SNB-75, U251, Colo205, HCC 2998, HCT-116, HCT-15, HT29, KM12, SW620, 786-0, A498, ACHN, CAKI, RXF 393, SN12C, TK-10, UO-31, CCRF-CEM, HL-60, K562, MOLT-4, RPMI-8226, SR, A549, EKVX, HOP-62, HOP-92, NCI-H226, NCI-H23, NCI-H322 M, NCI-H460, NCI-H522, LOX IMVI, M14, MALME-3 M, MDA-MB-435, SK-MEL-2, SK-MEL-28
- fibrosarcoma cell lines include, for example, fibrosarcoma cell lines (HT-1080); hepatocarcinoma cell lines (Hih-7); prostate cancer cell lines (LAPC4, LAPC9, VCaP, LuCaP, MDA PCa 2a/2b, C4, C4-2, PTEN-CaP8, PTEN-P8); breast cancer cell lines (HCC1599, HCC1937, HCC1143, MDA-MB-468, HCC38, HCC70, HCC1806, HCC1187, DU4475, BT-549, Hs 578T, MDA-MB-231, MDA-MB-436, MDA-MB-157, MDA-MB-453, HCC1599, HCC1937, HCC1143, MDA-MB-468, HCC38, HCC70, HCC1806, HCC1187, DU4475, BT-549, Hs 578T, MDA-MB-231, MDA-MB-436, MDA-MB-157, M
- the carrier cells selected and/or modified according to the methods provided herein can be used for virotherapy with any virus identified as having oncolytic properties.
- the carrier cell also can also be selected based on its ability to promote amplification of the oncolytic virus to be used for treatment.
- the carrier cell-virus combination selected according to the methods provided herein for identifying a subject and/or cancer-specific match can be used in the methods of treatment provided herein.
- Exemplary oncolytic viruses that can be used in the methods, combinations and compositions provided herein are as follows:
- Oncolytic viruses are characterized by their largely tumor cell specific replication, resulting in tumor cell lysis and efficient tumor regression. Oncolytic viruses effect treatment by colonizing or accumulating in tumor cells, including metastatic tumor cells such as circulating tumor cells, and replicating therein.
- the invention described herein can be used with any anti-cancer vaccine or virus.
- the oncolytic virus can be any naturally occurring or engineered recombinant virus such as, but not limited to, vaccinia virus, poxvirus, herpes simplex virus, adenovirus, adeno-associated virus, measles virus, reovirus, vesicular stomatitis virus (VSV), coxsackie virus, Semliki Forest Virus, Seneca Valley Virus, Newcastle Disease Virus, Sendai Virus Dengue Virus, picornavirus, poliovirus, parvovirus, retrovirus, lentivirus, alphavirus, flavivirus, rhabdovirus, papillomavirus, influenza virus, mumps virus, gibbon ape leukemia virus, and Sindbis virus, among others.
- tumor selectivity is an inherent property of the virus, such as vaccinia viruses and other oncolytic viruses.
- oncolytic viruses effect treatment by replicating in tumors or tumor cells resulting in lysis.
- an attenuated strain derived from a pathogenic virus is used for the manufacturing of a live vaccine.
- vaccinia viruses include, but are not limited to, Lister (also known as Elstree), New York City Board of Health (NYCBH), Dairen, Ikeda, LC16 M8, Western Reserve (WR), Copenhagen (Cop), Tashkent, Tian Tan, Wyeth, Dryvax, IHD-J, IHD-W, Brighton, Ankara, Modified Vaccinia Ankara (MVA), Dairen I, LIPV, LC16 M0, LIVP, WR 65-16, EM63, Bern, Paris, CVA382, NYVAC, ACAM2000 and Connaught strains.
- Lister also known as Elstree
- NYCBH New York City Board of Health
- WR Western Reserve
- Copenhagen Cop
- Tashkent Tian Tan, Wyeth, Dryvax, IHD-J, IHD-W, Brighton
- Ankara Modified Vaccinia An
- the viruses can be clonal strains of an oncolytic virus.
- the sequence of nucleotides encoding a chromophore-producing enzyme can be inserted into, or in place of, a non-essential gene or region in the genome of an unmodified oncolytic virus, or is inserted into or in place of nucleic acid encoding a heterologous gene product in the genome of an unmodified oncolytic virus.
- the vaccinia virus utilized in the methods disclosed herein is an attenuated New York City Board of Health (NYCBOH) strain.
- the NYCBOH strain of vaccinia virus can be ATCC VR-118 or CJ-MVB-SPX.
- the vaccinia virus is selected from Dryvax, ACAM1000, ACAM2000, Lister, EM63, LIVP, Tian Tan, Copenhagen, Western Reserve, or Modified Vaccinia Ankara (MVA).
- the oncolytic virus is not deficient in any genes present in one or more of these strains.
- the virus or vaccine is a replication competent virus. In some embodiments, the virus or vaccine is replication deficient.
- the virus or vaccine is non-attenuated.
- unmodified oncolytic viruses include any known to those of skill in the art, including those selected from among viruses designated GLV-1 h68, JX-594, JX-954, ColoAd1, MV-CEA, MV-NIS, ONYX-015, B18R, H101, OncoVEX GM-CSF, Reolysin, NTX-010, CCTG-102, Cavatak, Oncorine, and TNFerade.
- Oncolytic viruses for use in the methods provided herein include several well-known to one of skill in the art and include, for example, vesicular stomatitis virus, see, e.g., U.S. Pat. Nos. 7,731,974, 7,153,510, 6,653,103 and U.S. Pat. Pub. Nos. 2010/0178684, 2010/0172877, 2010/0113567, 2007/0098743, 20050260601, 20050220818 and EP Pat. Nos. 1385466, 1606411 and 1520175; herpes simplex virus, see, e.g., U.S. Pat. Nos.
- Newcastle Disease Virus is an avian paramyxovirus with a single-stranded RNA genome of negative polarity that infects poultry and is generally non-pathogenic to humans, but can cause flu-like symptoms (Tayeb et al. (2015) Oncolytic Virotherapy 4:49-62; Cheng et al. (2016) J. Virol. 90:5343-5352). Due to its cytoplasmic replication, lack of host genome integration and recombination and high genomic stability, NDV and other paramyxoviruses provide safer and more attractive alternatives to other oncolytic viruses, such as retroviruses or some DNA viruses (Matveeva et al. (2015) Molecular Therapy—Oncolytics 2, 150017).
- NDV has been shown to demonstrate tumor selectivity, with 10,000 times greater replication in tumor cells than normal cells, resulting in oncolysis due to direct cytopathic effects and induction of immune responses (Tayeb et al. (2015; Lam et al. (2011) Journal of Biomedicine and Biotechnology , Article ID 718710). Though the mechanism of NDV's tumor selectivity is not entirely clear, defective interferon production and responses to IFN signaling in tumor cells allow the virus to replicate and spread (Cheng et al. (2016); Ginting et al. (2017) Oncolytic Virotherapy 6:21-30). The high affinity of paramyxoviruses towards cancer cells can also be due to overexpression of viral receptors on cancer cell surfaces, including sialic acid (Cheng et al. (2016); Matveeva et al. (2015); Tayeb et al. (2015)).
- Non-engineered NDV strains are classified as lentogenic (avirulent), mesogenic (intermediate), or velogenic (virulent), based on their pathogenicity in chickens, with velogenic and mesogenic strains being capable of replication in (and lysis of) multiple human cancer cell lines, but not lentogenic strains (Cheng et al. (2016); Matveeva et al. (2015)). NDV strains also are categorized as lytic or non-lytic, with only the lytic strains being able to produce viable and infectious progeny (Ginting et al. (2017); Matveeva et al. (2015)).
- the oncolytic effects of non-lytic strains stems mainly from their ability to stimulate immune responses that result in antitumor activity (Ginting et al. (2017) Oncolytic Virotherapy 6:21-30).
- Mesogenic lytic strains commonly utilized in oncotherapy include PV701 (MK107), MTH-68/H and 73-T, and lentogenic non-lytic strains commonly utilized include HUJ, Ulster and Hitchner-B1 (Tayeb et al. (2015); Lam et al. (2011); Freeman et al. (2006) Mol. Ther. 13(1):221-228).
- NDV an oncolytic virus
- adenovirus and NDV were injected directly into a uterine carcinoma, resulting in partial necrosis.
- tumor regrowth was observed, likely due to suppression of oncolytic activity by the production of neutralizing antibodies against the virus (Lam et al. (2011) Journal of Biomedicine and Biotechnology , Article ID 718710).
- NDV strain PV701 displayed promising activity against colorectal cancer in a phase 1 trial (Laurie et al. (2006) Clin. Cancer Res.
- NDV strain 73-T demonstrated in vitro oncolytic activity against various human cancer cell lines, including fibrosarcoma, osteosarcoma, neuroblastoma and cervical carcinoma, as well as in vivo therapeutic effects in mice bearing human neuroblastomas, fibrosarcoma xenografts and several carcinoma xenografts, including colon, lung, breast and prostate cancer xenografts (Lam et al. (2011)).
- NDV strain MTH-68/H resulted in significant regression of tumor cell lines, including PC12, MCF7, HCT116, DU-145, HT-29, A431, HELA, and PC3 cells, and demonstrated favorable responses in patients with advanced cancers when administered by inhalation (Lam et al. (2011)).
- the non-lytic strain Ulster demonstrated cytotoxic effects against colon carcinoma, while the lytic strain juice effectively killed human melanomas (Lam et al. (2011)).
- Lentogenic NDV strain HUJ demonstrated oncolytic activity against recurrent glioblastoma multiforme when administered intravenously to patients, while lentogenic strain LaSota prolonged survival in colorectal cancer patients (Lam et al. (2011); Freeman et al.
- NDV strains also have been evaluated for oncolytic therapy.
- influenza NS1 gene an IFN antagonist
- was introduced into the genome of NDV strain Hitchner-B1 resulting in an enhanced oncolytic effect in a variety of human tumor cell lines and a mouse model of B16 melanoma (Tayeb et al. (2015)).
- the antitumor/immunostimulatory effects of NDV have been augmented by introduction of IL-2 or GM-CSF genes into the viral genome (Lam et al. (2011)).
- NDV oncolysates demonstrated oncolytic activity against malignant melanomas (Lam et al. (2011)).
- the use of NDV-infected cell-based carriers also has been demonstrated successfully.
- Autologous tumor cell lines infected with NDV were successfully utilized against colorectal, breast, ovarian, kidney, head and neck cancers and glioblastomas (Lam et al. (2011)).
- H-1 parvovirus is a small, non-enveloped single-stranded DNA virus belonging to the family Parvoviridae, whose natural host is the rat (Angelova et al. (2017) Front. Oncol. 7:93; Angelova et al. (2015) Frontiers in Bioengineering and Biotechnology 3:55). H-1PV is nonpathogenic to humans, and is attractive as an oncolytic virus due to its favorable safety profile, the absence of preexisting H-1PV immunity in humans and their lack of host cell genome integration (Angelova et al. (2015)).
- H-1PV has demonstrated broad oncosuppressive potential against both solid tumors, including preclinical modes of breast, gastric, cervical, brain, pancreatic and colorectal cancer, as well as hematological malignancies, including lymphoma and leukemia Angelova et al. (2017)).
- H-1PV stimulates anti-tumor responses via the increased presentation of tumor-associated antigens, maturation of dendritic cells and the release of pro-inflammatory cytokines (Moehler et al. (2014) Frontiers in Oncology 4:92).
- H-1PV also displays tumor selectivity, which is thought to be due to the availability of cellular replication and transcription factors, the overexpression of cellular proteins that interact with the NS1 parvoviral protein, and the activation of metabolic pathways involved in the functional regulation of NS1 in tumor cells, but not normal cells (Angelova et al. (2015) Frontiers in Bioengineering and Biotechnology 3:55). Due to the innocuous nature of H-1PV, the wild type strain is often utilized, negating the need for attenuation by genetic engineering (Angelova et al. (2015)).
- H-1PV Del H-1PV, a fitness variant with higher infectivity and spreading in human transformed cell lines, demonstrated oncolytic effects in vivo in pancreatic cancer and cervix carcinoma xenograft models (Geiss et al. (2017) Viruses 9, 301). H-1PV also demonstrated oncolytic activity against a panel of five human osteosarcoma cell lines (CAL 72, H-OS, MG-63, SaOS-2, U-20S) (Geiss et al. (2017) Viruses 9, 301) and against human melanoma cells (SK29-Mel-1, SK29-Mel-1.22) (Moehler et al. (2014) Frontiers in Oncology 4:92).
- nude rats bearing cervical carcinoma xenografts demonstrated dose-dependent tumor growth arrest and regression following treatment with H-1PV (Angelova et al. (2015)).
- the intratumoral and intravenous administration of H-1PV also demonstrated significant growth suppression in human mammary carcinoma xenografts in immunocompromised mice (Angelova et al. (2015)).
- Intratumoral H-1PV injection in human gastric carcinoma or human Burkitt lymphoma-bearing mice resulted in tumor regression and growth suppression (Angelova et al. (2015)).
- H-1PV also has demonstrated efficient killing of highly aggressive pancreatic ductal adenocarcinoma (PDAC) cells in vitro, including those resistant to gemcitabine, and intratumoral injection of H-1PV resulted in tumor regression and prolonged animal survival in an orthotopic rat model of PDAC (Angelova et al. (2017); Angelova et al. (2015)). Similar results, including selective tumor targeting and absence of toxicity, were observed in an immunodeficient nude rat PDAC model (Angelova et al. (2015)).
- PDAC pancreatic ductal adenocarcinoma
- H-1PV cytostatic (cisplatin, vincristine) or targeted (sunitinib) drugs results in the synergistic induction of apoptosis in human melanoma cells (Moehler et al. (2014)).
- H-1PV can also be engineered to express anti-cancer molecules. For example, studies have shown that a parvovirus-H1-derived vector expressing Apoptin had a greater capacity to induce apoptosis than wild-type H-1PV (Geiss et al. (2017)).
- H-1PV has demonstrated successful anti-tumor effects when combined with cell-based vehicles, circumventing these potential issues.
- autologous MH3924A rat hepatoma cells were successfully used for the targeted delivery of H-1PV and suppression of metastases formed by the same cells (Raykov et al. (2004) Int. J. Cancer 109:742-749).
- the hepatoma cells were inactivated by ⁇ -radiation 24 h following infection with H-1PV, which only reduced progeny virus yields by 2-fold or less.
- the vehicle cell-based therapy results in improved suppression of metastases and the generation of fewer neutralizing antibodies, supporting the use of carrier cells to deliver oncolytic parvoviruses systemically (Raykov et al. (2004)).
- Measles virus is an enveloped, single-stranded RNA virus with a negative-sense genome that belongs to the family of Paramyxoviruses (Aref et al. (2016) Viruses 8:294; Hutzen et al. (2015) Oncolytic Virotherapy 4:109-118). Its non-segmented genome is stable, with a low risk of mutating and reverting to its pathogenic form, and due to its replication in the cytoplasm, poses no risk of insertional DNA mutagenesis in infected cells (Aref et al. (2016); Hutzen et al. (2015)).
- MV was first isolated from a patient called Edmonston in 1954, and developed into a live vaccine with an excellent safety profile, that has successfully protected over a billion individuals worldwide for 50 years, by attenuation following multiple in vitro passages (Aref et al. (2016) Viruses 8:294; Hutzen et al. (2015) Oncolytic Virotherapy 4:109-118).
- Derivatives of this strain denoted as MV-Edm, are the most commonly utilized MV strains in oncolytic therapy studies.
- the Schwarz/Moraten measles vaccine strain is more attenuated and immunogenic than Edm derivatives, which makes them safer and more immunomodulatory (Veinalde et al.
- MV utilizes three main receptors for entry into target cells: CD46, nectin-4 and signaling lymphocyte activation molecule (SLAM) (Aref et al. (2016); Hutzen et al. (2015)).
- SLAM signaling lymphocyte activation molecule
- SLAM which is expressed on activated B and T cells, immature thymocytes, monocytes and dendritic cells, is the main receptor for wildtype strains, attenuated and tumor-selective MV-Edm strains primarily target the CD46 receptor, a regulator of complement activation that is overexpressed in many tumor cells (Aref et al. (2016); Hutzen et al. (2015); Jacobson et al.
- Nectin-4 which is predominantly expressed in the respiratory epithelium, is utilized by both wildtype and attenuated MV strains (Aref et al. (2016); Msaouel et al. (2013) Expert Opin. Biol. Ther. 13(4)).
- defects in the IFN antiviral response of tumor cells also facilitates the tumor-selectivity of MV (Aref et al. (2016); Jacobson et al. (2017) Oncotarget 8(38):63096-63109).
- NCT02192775, NCT00450814 multiple myeloma
- NCT01846091 head and neck cancer
- NCT01503177 mesothelioma
- NCT00408590, NCT02364713 ovarian cancer
- MV has been genetically engineered to express immune-stimulating and immunomodulatory genes, including those encoding IL-13, INF-beta, GM-CSF and Helicobacter pylori neutrophil-activating protein (NAP), for example (Aref et al. (2016), Hutzen et al. (2015); Msaouel et al. (2013) Expert Opin. Biol. Ther. 13(4)).
- Combination therapies utilizing oncolytic MV with anti-CTLA4 and anti-PD-L1 antibodies have proven successful in melanoma mouse models (Aref et al. (2016); Hutzen et al. (2015)). Due to widespread vaccination or previous natural infection, most patients have prior immunity to MV, which hinders its therapeutic potential.
- MV has been delivered to tumors in carrier cells, such as mesenchymal stromal cells, effectively evading the host neutralizing antibodies and proving effective in pre-clinical models of acute lymphoblastic leukemia, hepatocellular carcinoma and ovarian carcinoma (Aref et al. (2016)).
- carrier cells such as mesenchymal stromal cells
- MV has been delivered to tumors in carrier cells, such as mesenchymal stromal cells, effectively evading the host neutralizing antibodies and proving effective in pre-clinical models of acute lymphoblastic leukemia, hepatocellular carcinoma and ovarian carcinoma.
- carrier cells such as mesenchymal stromal cells
- NCT02068794 Another strategy to overcome pre-existing immunity involves the combination of MV therapy with immunosuppressive agents such as cyclophosphamide (Hutzen et al. (2015)).
- MV-CEA which is genetically engineered to express the tumor marker carcinoembryonic antigen (CEA), results in the release of CEA into the blood stream of patients following infection of cancer cells, allowing the detection of CEA levels and thus, the tracking of in vivo viral infection (Aref et al. (2016); Hutzen et al. (2015)).
- CEA tumor marker carcinoembryonic antigen
- MV-NIS is another trackable oncolytic MV of the Edmonston vaccine lineage, engineering to express the sodium iodide symporter (NIS), which displays superior viral proliferation compared to MV-CEA, due to the positioning of the NIS transgene downstream of the hemagglutinin (H) gene of the MV genome, instead of upstream of the nucleocapsid (N) gene, as in the MV-CEA construct (Aref et al. (2016); Galanis et al. (2015) Cancer Res. 75(1):22-30).
- NIS sodium iodide symporter
- Radioisotopes such as 123 I, 124 I, 125 I, 131 I and 99m Tc are transported via NIS, which is expressed on MV-NIS infected cells, allowing for non-invasive imaging using, for example, PET, SPECT/CT, and ⁇ camera (Msaouel et al. (2013) Expert Opin. Biol. Ther. 13(4)).
- NIS also can improve the efficacy of oncolytic MV by facilitating the entry of beta-emitting radioisotopes, such as 1-131, into tumor cells for radiovirotherapy, and has demonstrated promising results pre-clinically in multiple myeloma, glioblastoma multiforme, head and neck cancer, anaplastic thyroid cancer and prostate cancer models (Aref et al. (2016); Hutzen et al. (2015); Msaouel et al. (2013)).
- beta-emitting radioisotopes such as 1-131
- NCT00450814, NCT02192775 mesothelioma
- NCT01503177 mesothelioma
- NCT01846091 head and neck cancer
- NCT02068794 virus-infected MSCs
- Respiratory Enteric Orphan virus commonly known as Reovirus
- Reovirus is a non-enveloped double-stranded RNA virus of the Reoviridae family that is nonpathogenic to humans. Wild-type reovirus is ubiquitous throughout the environment, resulting in a 70-100% seropositivity in the general population (Gong et al. (2016) World J. Methodol. 6(1):25-42).
- serotypes of reovirus which include type 1 Lang, type 2 Jones, type 3 Abney and type 3 Dearing (T3D).
- T3D is the most commonly utilized naturally occurring oncolytic reovirus serotype in pre-clinical and clinical studies.
- Oncolytic reovirus is believed to be tumor-selective due to activated Ras signaling that is characteristic of cancer cells (Gong et al. (2016)); Zhao et al. (2016) Mol. Cancer Ther. 15(5):767-773).
- Activation of the Ras signaling pathway disrupts the cell's anti-viral responses, by inhibiting the phosphorylation of dsRNA-dependent protein kinase (PKR), a protein that is normally responsible for preventing viral protein synthesis (Zhao et al. (2016)). Ras activation also enhances viral un-coating and disassembly, results in enhanced viral progeny generation and infectivity, and accelerates the release of progeny through enhanced apoptosis (Zhao et al. (2016)).
- PSR dsRNA-dependent protein kinase
- pancreatic adenocarcinomas display a very high incidence of Ras mutations (approximately 90%), and reovirus has shown potent cytotoxicity in 100% of pancreatic cell lines tested in vitro and induced regression in 100% of subcutaneous tumor mouse models in vivo. (Gong et al. (2016)).
- Reovirus has demonstrated broad anticancer activity pre-clinically across a spectrum of malignancies including colon, breast, ovarian, lung, skin (melanoma), neurological, hematological, prostate, bladder, and head and neck cancer (Gong et al. (2016)).
- Reovirus therapy is currently being tested in combination with radiotherapy, chemotherapy, immunotherapy, and surgery.
- the combination of reovirus and radiation therapy has proven beneficial in the treatment of head and neck, colorectal and breast cancer cell lines in vitro, as well as colorectal cancer and melanoma models in vivo (Gong et al. (2016)).
- Reolysin® developed by the Canadian company Oncolytics Biotech Inc., is the only therapeutic wild-type reovirus in clinical development, and has demonstrated anticancer activity in many malignancies alone, and in combination with other therapeutics.
- a phase I clinical study of Reolysin® in the treatment of recurrent malignant gliomas (NCT00528684) found that the reovirus was well tolerated, while a phase VII trial found that Reolysin® is able to kill tumor cells without damaging normal cells in patients with ovarian epithelial cancer, primary peritoneal cancer, or fallopian tube cancer that did not respond to platinum chemotherapy (NCT00602277).
- a phase II clinical trial of Reolysin® found that it was safe and effective in the treatment of patients with bone and soft tissue sarcomas metastatic to the lung (NCT00503295).
- a phase II clinical trial of Reolysin® in combination with the chemotherapeutic gemcitabine was carried out in patients with advanced pancreatic adenocarcinoma (NCT00998322), a phase II clinical study investigated the therapeutic potential of Reolysin® in combination with docetaxel in metastatic castration resistant prostate cancer (NCT01619813), and a phase II clinical trial investigated the combination of Reolysin® with paclitaxel in patients with advanced/metastatic breast cancer (NCT01656538).
- a phase III clinical trial investigated the efficacy of Reolysin® in combination with paclitaxel and carboplatin in platinum-refractory head and neck cancers (NCT01166542), while phase II clinical studies employing this combination therapy were carried out in patients with non-small cell lung cancer (NCT00861627) and metastatic melanoma (NCT00984464).
- a phase I clinical trial of Reolysin® in combination with carfilzomib and dexamethasone in patients with relapsed or refractory multiple myeloma is ongoing (NCT02101944).
- reovirus Due to the presence of neutralizing antibodies in the majority of the population, systemic administration of reovirus has limited therapeutic potential, which can be overcome with the co-administration of reovirus with immunosuppressive agents, such as cyclosporin A or cyclophosphamide (Gong et al. (2016)).
- immunosuppressive agents such as cyclosporin A or cyclophosphamide
- the administration of GM-CSF prior to IV administration of reovirus resulted in significant reduction of B16 melanoma tumors and prolonged survival in mice (Kemp et al. (2015) Viruses 8, 4).
- Carrier cells also have demonstrated success in shielding the virus from pre-existing immunity.
- lymphokine-activated killer cells LAKs and DCs were utilized as cell carriers for reovirus in a model of ovarian cancer, and successfully protected the virus from neutralizing antibodies (Zhao et al. (2016)).
- PMBCs including NK cells, have been shown to not only successfully transport reovirus, but were also stimulated by reovirus to kill the tumor targets (Zhao et al. (2016)).
- Another study showed that both DCs and T cells were effective carriers of reovirus in vitro in the absence of human serum, but only DCs successfully delivered the virus to melanoma cells in the presence of neutralizing serum (Ilett et al. (2011) Clin. Cancer Res. 17(9):2767-2776).
- DCs also were capable of delivering reovirus in mice bearing lymph node B16tk melanoma metastases, whereas neat reovirus was completely ineffective (Ilett et al. (2009) Gene Ther. 16(5):689-699).
- VSV Vesicular Stomatitis Virus
- VSV Vesicular stomatitis virus
- N nucleocapsid protein
- P phosphoprotein
- M matrix protein
- G glycoprotein
- L large polymerase protein
- VSV is a potent and rapid inducer of apoptosis in infected cells, and has been shown to sensitize chemotherapy-resistant tumor cells. VSV has been shown to infect tumor vasculature, resulting in a loss of blood flow to the tumor, blood-coagulation and lysis of neovasculature. This virus also is capable of replication and induction of cytopathic effects and cell lysis in hypoxic tissues.
- WT VSV grows to high titers in a variety of tissue culture cells lines, facilitating large-scale virus production, it has a small and easy to manipulate genome, and it replicates in the cytoplasm without risk of host cell transformation (Bishnoi et al.
- VSV can attach to ubiquitously expressed cell-surface molecules, making it “pantropic,” WT VSV is sensitive to type I IFN responses and thus displays oncoselectivity based on the defective or inhibited type I IFN signaling of tumors (Felt and Grdzelishvili (2017)).
- VSV due to its infectivity of normal cells, VSV can cause neuropathogenecity, but can be attenuated by modifying its matrix protein and/or glycoprotein.
- the matrix protein can be deleted or the methionine residue at position 51 of the matrix protein can be deleted or substituted with arginine (Bishnoi et al. (2016); Felt and Grdzelishvili (2017)).
- VSV lymphocytic choriomeningitis virus
- LCMV lymphocytic choriomeningitis virus
- rVSV-GP lymphocytic choriomeningitis virus
- suicide genes such as herpes virus thymidine kinase (TK)
- TK herpes virus thymidine kinase
- GM-CSF1 costimulatory agents
- GM-CSF1 granulocyte-macrophage-colony-stimulating factor 1
- VSV-IFN ⁇ -sodium iodide symporter (VSV-IFN ⁇ -NIS), which encodes NIS and IFN ⁇ , is currently being tested in the USA in several phase I clinical trials (see details at ClinicalTrials.gov for trials NCT02923466, NCT03120624 and NCT03017820).
- VSV Vesicular stomatitis virus
- IV intravenously
- VSV-GP was successful in the intratumoral treatment of subcutaneously engrafted G62 human glioblastoma cells, as well as the intravenous treatment of orthotopic U87 human glioma cells, in immune-deficient mouse models.
- Intratumoral injection of VSV-GP also was effective against intracranial CT2A murine glioma cells (Muik et al. (2014) Cancer Res. 74(13):3567-3578).
- VSV-GP did not elicit a detectable neutralizing antibody response, and that this genetically modified oncolytic virus was insensitive to human complement, remaining stable over the length of the experiment (Muik et al. (2014)).
- intratumoral administration of VSV-GP was found to effectively infect and kill human A375 malignant melanoma cells transplanted in a mouse model, as well as the murine B16 melanoma cell line (Kimpel et al. (2016) Viruses 10, 108).
- intravenous injection of the oncolytic virus was not successful, and even in the intratumorally-administered groups, the tumors all eventually grew, due to type I IFN responses (Kimpel et al. (2018)).
- Systemic cell-mediated delivery also was obtained using xenogeneic A549 cells as carrier cells, illustrating that cell-mediated delivery of VSV can be achieved using immunologically compatible syngeneic CT26 cells as well as immunologically incompatible xenogeneic A549 cells (Power et al. (2007)).
- L1210 murine leukemia cells also successfully delivered VSV to lung tumors, as well as subcutaneous tumors located in the hind flank of the mice (Power et al. (2007)). When these VSV infected leukemia cells were administered to mice without tumors, there was no detectable virus replication in normal tissues, indicating tumor selectivity.
- VSV-651 which lacks the methionine 51 of the matrix protein and thus cannot block the nuclear export of IFN-encoding mRNAs, was loaded onto OT-I CD8+ T cells expressing a transgenic T cell receptor specifically for the SIINFEKL epitope of ovalbumin antigen, which is expressed by B16 ova tumors (Qiao et al. (2008) Gene Ther. 15(8):604-616).
- This oncolytic virus/cell-based vehicle combination was used against B16 ova tumors in the lungs of immune-competent C57B1/6 mice, and resulted in significant increases in therapeutic efficacy when compared to the use of virus or T cells alone.
- VSV virus was released and effectively infected, replicated in, and killed tumor cells following co-culture of infected T cells with B16 ova cells.
- the loading of VSV onto the T cells was shown to increase T-cell activation in vitro and increase trafficking of the T cells to the tumors in vivo (Qiao et al. (2008)).
- Ads are non-enveloped ds-DNA viruses with a linear genome that were first discovered in 1953 by Wallace Rowe and colleagues, and were tested for the treatment of cervical cancer as early as 1956 (Choi et al. (2015) J. Control. Release 10(219):181-191).
- Human Ads are ubiquitous in the environment and are classified into 57 serotypes (Ad1-Ad57), based on cross-susceptibility, and 7 subgroups (A-G), based on virulence and tissue tropism.
- Ad5 is the most commonly utilized adenovirus for oncolytic virotherapy.
- Ads enter cells by attaching to the coxsackievirus and adenovirus receptor (CAR), followed by interaction between the ⁇ v ⁇ 3 and ⁇ v ⁇ 5 integrins on the cell surface and the Arg-Gly-Asp tripeptide motif (RGD) at the adenoviral penton base (Jiang et al. (2015) Curr. Opin. Virol. 13:33-39).
- CAR coxsackievirus and adenovirus receptor
- RGD Arg-Gly-Asp tripeptide motif
- CAR is expressed on the surfaces of most normal cells, but expression is highly variable across cancer cell types.
- RGD-related integrins are highly expressed by cancer cells, but are expressed at much lower levels in normal cells (Jiang et al. (2015)).
- Ads are often targeted to cancer cells via the RGD motif.
- Ads are attractive as oncolytic viruses due to their high transduction efficiency in transformed cells, their lack of integration into the host genome/lack of insertional mutagenesis, their genomic stability, the ability to insert large therapeutic genes into their genomes, and their capacity for tumor selectivity via genetic manipulation, such as the substitution of viral promoters with cancer tissue-selective promoters (Yokoda et al. (2016) Biomedicines 6, 33; Choi et al. (2015) J. Control. Release 10(219):181-191).
- oncolytic Ads with tumor-specific promoters include CV706 for prostate cancer treatment, with the adenovirus early region 1A (E1A) gene under control of the prostate specific antigen promoter, and OBP-301, which utilizes the telomerase reverse transcriptase (TERT) promoter for regulation of E1A gene expression (Yamamoto et al. (2017) Cancer Sci. 108:831-837).
- E1A adenovirus early region 1A
- OBP-301 which utilizes the telomerase reverse transcriptase
- Another method for inducing tumor selectivity is the introduction of mutations in the E1 region of the Ad genome, where the missing genes are functionally complemented by genetic mutations commonly found in tumor cells, such as abnormalities in the retinoblastoma (Rb) pathway or p53 mutations (Yamamoto et al. (2017) Cancer Sci.
- E1A ⁇ 24 is an oncolytic Ad that contains a 24-bp mutation in the E1A gene, disrupting the Rb-binding domain and promoting viral replication in cancer cells with Rb pathway mutations.
- ICOVIR-5 is an oncolytic Ad that combines E1A transcriptional control by the E2F promoter, the 424 mutation of E1A and an RGD-4C insertion into the adenoviral fiber (Yamamoto et al. (2017) Cancer Sci. 108:831-837; Uusi-Kerttula et al. (2015)).
- Delta-24-RGD, or DNX-2401 is an oncolytic Ad in which the 424 backbone is modified by insertion of the RGD motif, that demonstrated enhanced oncolytic effects in vitro and in vivo (Jiang et al. (2015)).
- VCN-01 an oncolytic Ad that expresses hyaluronidase, that has shown promise in murine cancer models.
- Ads also have been engineered to express relaxin to disrupt the ECM (Yamamoto et al. (2017) Cancer Sci. 108:831-837; Shaw and Suzuki (2015) Curr. Opin. Virol. 21:9-15).
- Ads expressing suicide genes such as cytosine deaminase (CD) and HSV-1 thymidine kinase (TK) have shown enhanced antitumor efficacy in vivo, as have Ads expressing immunostimulatory cytokines, such as ONCOS-102, which expresses GM-CSF (Yamamoto et al. (2017) Cancer Sci. 108:831-837; Shaw and Suzuki (2015) Curr. Opin. Virol. 21:9-15).
- a ⁇ 24-based oncolytic Ad expressing an anti-CTLA4 antibody has shown promise in preclinical studies (Jiang et al. (2015)).
- the adenovirus H101 (Oncorine®) was the first oncolytic Ad approved for clinical use in China in combination with chemotherapy, for treating patients with advanced nasopharyngeal cancer in 2005. Due to the promise shown in preclinical studies, many clinical trials have investigated the use of oncolytic adenoviruses for the treatment of a wide variety of cancers.
- ongoing and past clinical trials include studies involving Ad5 encoding IL-12 in patients with metastatic pancreatic cancer (NCT03281382); an immunostimulatory Ad5 (LOAd703) expressing TMX-CD40L and 4-1BBL in patients with pancreatic adenocarcinoma, ovarian cancer, biliary carcinoma and colorectal cancer (NCT03225989); LOAd703 in combination with gemcitabine and nab-paclitaxel in patients with pancreatic cancer (NCT02705196); an oncolytic adenovirus encoding human PH20 hyaluronidase (VCN-01) in combination with gemcitabine and Abraxane® in patients with advanced solid tumors, including pancreatic adenocarcinoma (NCT02045602; NCT02045589); Telomelysin® (OBP-301), an oncolytic Ad with tumor selectivity, containing the human telomerase reverse transcriptase (hTERT)
- Ads suffer from a low therapeutic efficacy when systemically administered due to the development of neutralizing antibodies, and due to their high seroprevalence, it is estimated that as much as 90% of some populations possess prior immunity to Ads (Uusi-Kerttula et al. (2015) Viruses 7:6009-6042). Additionally, nonspecific liver sequestration of the Ads results in hepatotoxicity (Choi et al. (2015)).
- Polymers such as PEG, positively charged arginine-grafted bioreducible polymer (ABP), PAMAMG5, and other nanomaterials can be utilized to mask the viral capsid protein, mitigating the anti-viral immune response and nonspecific liver accumulation, and increasing tumor accumulation (Choi et al. (2015)).
- Other approaches to evade the immune system involve the use of carrier vehicle cells to deliver oncolytic Ads.
- T-cells were used to deliver Delta24-RGD Ad to glioblastoma cells in vitro and in vivo in an orthotopic glioma stem cell (GSC)-based xenograft murine model (Balvers et al. (2014) Viruses 3:180-3096).
- GSC orthotopic glioma stem cell
- Poliovirus belongs to the genus Enterovirus in the family Picornaviridae and has a positive-sense single-stranded RNA genome. PV infection results in severe neurological syndrome poliomyelitis, due to the tropism of PV for spinal cord and motor neurons (Brown and Gromeier (2015) Discov. Med. 19(106):359-365). PVs are useful in clinical application due to their retention of a robust replicative capacity and cytotoxicity in the presence of an active antiviral IFN response, allowing for several rounds of viral replication to amplify the immune-stimulating viral cytotoxic effects (Brown and Gromeier (2015) Discov. Med. 19(106):359-365). PVs also do not integrate into the host cell genome (Yla-Pelto et al. (2016) Viruses 8, 57).
- PV host cell entry is mediated by the Ig-superfamily cell adhesion molecule CD155, also known as PV receptor (PVR) and Nectin-like molecule 5 (Nec15), which is widely overexpressed in solid neoplasias, such as glioblastoma (Brown and Gromeier (2015) Curr. Opin. Virol. 13:81-85).
- CD155 also is expressed in colorectal carcinoma, lung adenocarcinoma, breast cancers and melanoma, and is expressed in antigen presenting cells (APCs) such as macrophages and dendritic cells (Brown et al. (2014) Cancer 120(21):3277-3286).
- APCs antigen presenting cells
- the internal ribosomal entry site (IRES) of PV is responsible for driving translation initiation of the PV RNA genome, and is implicated in the neuropathogenicity of PV.
- the live-attenuated PV vaccines which are derived from the Sabin serotypes, carry critical attenuating point mutations in the IRES (Brown and Gromeier (2015) Curr. Opin. Virol. 13:81-85).
- the highly attenuated polio-/rhinovirus recombinant PVSRIPO a type 1 (Sabin) live-attenuated PV vaccine in which the cognate PV IRES is replaced with that of the human rhinovirus 2 (HRV2), exhibits no neurovirulence/neuropathogenicity in comparison to the parent PV, but retains cancer cell cytotoxicity and specificity towards GBM cells.
- HRV2 human rhinovirus 2
- PVSRIPO causes tumor regression by eliciting an antitumor immune response, rather than the direct lysis of bulk tumor, and has shown promise in clinical trials for the treatment of recurrent glioblastoma (GBM) (NCT01491893) (Brown and Gromeier (2015) Curr. Opin. Virol. 13:81-85; Brown and Gromeier (2015) Discov. Med. 19(106):359-365).
- Herpes simplex virus belongs to the family Herpesviridae and has a large linear double-stranded DNA genome, including many genes that are nonessential for viral replication, making it an ideal candidate for genetic manipulation. Other advantages include its ability to infect a broad range of cell types, its sensitivity to antivirals such as aciclovir and ganciclovir, and its lack of insertional mutagenesis (Sokolowski et al. (2015) Oncolytic Virotherapy 4:207-219; Yin et al. (2017) Front. Oncol. 7:136). There are two types of HSV, HSV type I (HSV-1) and type II (HSV-2), with the majority of oncolytic HSVs being derived from HSV-1.
- HSV type I HSV-1
- HSV-2 type II
- HSV-1 causes fever blister disease and infects epithelial cells, neurons, and immune cells by binding to nectins, glycoproteins, and the herpesvirus entry mediator (HVEM) on the cell surface (Kohlhapp and Kaufman (2016) Clin. Cancer Res. 22(5): 1048-1054).
- HVEM herpesvirus entry mediator
- HSV-1 has been engineered to express the anti-HER-2 antibody trastuzumab, targeting tumors that overexpress HER-2, such as breast and ovarian cancers, gastric carcinomas and glioblastomas.
- the gene encoding trastuzumab was inserted into two regions within the HSV-1 gD glycoprotein gene, generating two oncolytic HSVs, R-LM113 and R-LM249.
- R-LM113 and R-LM249 demonstrated preclinical activity against human breast and ovarian cancers, and against a murine model of HER2+ glioblastoma.
- R-LM249 has been administered systemically using mesenchymal stromal cells (MSCs) as carrier cells, exerting therapeutic effects against lung and brain metastases of ovarian and breast cancer in a murine model (Campadelli-Fiume et al. (2016) Viruses 8, 63).
- MSCs mesenchymal stromal cells
- Another oncolytic HSV-1, dlsptk HSV-1 contains a deletion in the unique long 23 (UL23) gene, which encodes the viral homologue of thymidine kinase (TK), while the hrR3 HSV-1 mutant contains a LacZ insertion mutation of the large subunit of ribonucleotide reductase (RR), also known as ICP6, encoded by the gene UL39.
- TK thymidine kinase
- RR ribonucleotide reductase
- ICP6 ribonucleotide reductase
- HF10 is a spontaneously mutated oncolytic HSV-1 that lacks the genes encoding UL43, UL49.5, UL55, UL56 and latency-associated transcripts, and overexpresses UL53 and UL54.
- HF10 has shown promising results in preclinical studies and demonstrated high tumor selectivity, high viral replication, potent antitumor activity and a favorable safety profile (Eissa et al. (2017) Front. Oncol. 7:149).
- Clinical trials investigating HF10 include: a phase I study in patients with refractory head and neck cancer, squamous cell carcinoma of the skin, carcinoma of the breast and malignant melanoma (NCT01017185) and a Phase I study of HF10 in combination with chemotherapy (gemcitabine, Nab-paclitaxel, TS-1) in patients with unresectable pancreatic cancer (NCT03252808).
- HF10 also has been combined with the anti-CTLA-4 antibody ipilimumab, resulting in improved therapeutic efficacy in patients with stage IIIb, Mc or IV unresectable or metastatic melanoma (NCT03153085).
- GM-CSF Talimogene laherparepvec
- T-VEC Talimogene laherparepvec
- OncoVEX GM-CSF is an FDA-approved oncolytic herpes simplex virus for the treatment of advanced melanoma, that was generated from the JS1 strain of HSV-1 and genetically engineered to express granulocyte macrophage stimulating factor (GM-CSF) (Aref et al. (2016) Viruses 8:294).
- GM-CSF granulocyte macrophage stimulating factor
- T-VEC GM-CSF expression enhances the antitumor cytotoxic immune response, while deletion of both copies of the infected cell protein 34.5 (ICP34.5) gene suppresses replication in normal tissues, and deletion of the ICP47 gene increases expression of MHC class I molecules, allowing for antigen presentation on infected cells (Eissa et al. (2017)).
- T-VEC exhibits tumor selectivity by binding to nectins on the surface of cancer cells and preferentially replicates in tumor cells by exploiting disrupted oncogenic and antiviral signaling pathways, particularly the protein kinase R (PKR) and type I IFN pathways.
- PTR protein kinase R
- PKR is activated by viral infection, which then phosphorylates the eukaryotic initiation factor-2A protein (eIF-2A), inactivating it and in turn, inhibiting cellular protein synthesis, blocking cell proliferation and preventing viral replication.
- Wild-type HSV escapes the antiviral response due to expression of the ICP34.5 protein, which activates a phosphatase that dephosphorylates eIF-2A, restoring protein synthesis in the infected cells.
- ICP34.5 precludes viral replication of T-VEC in normal cells.
- the PKR-eIF-2A pathway in cancer cells is disrupted, permitting continuous cell growth and uninhibited viral replication (Kohlhapp and Kaufman (2016) Clin. Cancer Res.
- GM-CSF improves the immunogenicity of T-VEC by causing dendritic cell accumulation, promoting antigen-presentation and priming T-cell responses (Kohlhapp and Kaufman (2016) Clin. Cancer Res. 22(5):1048-1054).
- T-VEC has shown preferential replication in a variety of different cancer cell lines, including breast cancer, colorectal adenocarcinoma, melanoma, prostate cancer, and glioblastoma.
- Clinical trials include, for example, those investigating T-VEC in pancreatic cancer (NCT03086642, NCT00402025), recurrent breast cancer (NCT02658812), advanced non-CNS tumors in children (NCT02756845), non-melanoma skin cancer (NCT03458117), non-muscle invasive bladder transitional cell carcinoma (NCT03430687), and malignant melanoma (NCT03064763), as well as T-VEC in combination with atezolizumab in patients with metastatic triple negative breast cancer and metastatic colorectal cancer with liver metastases (NCT03256344), in combination with paclitaxel in patients with triple negative breast cancer (NCT02779855), in combination with nivolumab in patients with re
- NV1020 (or R7020) is an HSV-1 mutant that contains deletions in the UL55, UL56, ICP4, RL1 and RL2 genes, resulting in reduced neurovirulence and cancer selectivity.
- NV1020 displayed promising results in murine models of head and neck squamous cell carcinoma, epidermoid carcinoma and prostrate adenocarcinoma (Sokolowski et al. (2015)). Additionally, clinical trials have investigated the safety and efficacy of NV1020 in colorectal cancer metastatic to the liver (NCT00149396 and NCT00012155).
- G207 (or MGH-1) is another HSV-1 mutant with an RL1 ( ⁇ 1 34.5) deletion and a LacZ inactivating insertion in the UL39 neurovirulence gene.
- Clinical studies utilizing G207 include the investigation of G207 administration alone or with a single radiation dose in children with progressive or recurrent supratentorial brain tumors (NCT02457845), the investigation of the safety and efficacy of G207 in patients with recurrent brain cancer (glioma, astrocytoma, glioblastoma) (NCT00028158), and the investigation of the effects of G207 administration followed by radiation therapy in patients with malignant glioma (NCT00157703).
- G207 was used to generate G474, which contains a further deletion in the gene encoding ICP47.
- HSV-1 derived oncolytic viruses include HSV1716, which contains deletions in RL1, but has an intact UL39 gene and replicates selectively in actively dividing cells, and the KM100 mutant, which has insertions in the UL48 and RL2 genes, resulting in a loss of expression of immediate early viral genes and cancer cell selectivity (Sokolowski et al. (2015); Yin et al. (2017) Front. Oncol. 7:136).
- MCs peritoneal mesothelial cells
- Oncolytic viruses also have been derived from HSV-2.
- FusOn-H2 is an HSV-2 oncolytic virus with a deletion of the N-terminal region of the ICP10 gene that encodes a serine/threonine protein kinase (PK) domain.
- PK serine/threonine protein kinase
- This PK is responsible for phosphorylating GTPase-activating protein Ras-FAP, which activates the Ras/MEK/MAPK mitogenic pathway and induces and stabilizes c-Fos, which is required for efficient HSV-2 replication.
- Normal cells usually have an inactivated Ras signaling pathway.
- FusOn-H2 exhibits tumor selectivity by replicating only in tumor cells with activated Ras signaling pathways (Fu et al. (2006) Clin. Cancer Res.
- FusOn-H2 has demonstrated activity against pancreatic cancer xenografts (Fu et al. (2006) Clin. Cancer Res. 12(10):3152-3157), against Lewis lung carcinoma xenografts in combination with cyclophosphamide, and against syngeneic murine mammary tumors and neuroblastoma (Li et al. (2007) Cancer Res. 67:7850-7855).
- vaccinia viruses include, but are not limited to, Lister (also known as Elstree), New York City Board of Health (NYCBH), Dairen, Ikeda, LC16 M8, Western Reserve (WR), Copenhagen (Cop), Tashkent, Tian Tan, Wyeth, Dryvax, IHD-J, IHD-W, Brighton, Ankara, Modified Vaccinia Ankara (MVA), Dairen I, LIPV, LC16 M0, LIVP, WR 65-16, EM63, Bern, Paris, CVA382, NYVAC, ACAM2000 and Connaught strains.
- Vaccinia viruses are oncolytic viruses that possess a variety of features that make them particularly suitable for use in wound and cancer gene therapy.
- vaccinia is a cytoplasmic virus, thus, it does not insert its genome into the host genome during its life cycle. Unlike many other viruses that require the host's transcription machinery, vaccinia virus can support its own gene expression in the host cell cytoplasm using enzymes encoded in the viral genome. Vaccinia viruses also have a broad host and cell type range. In particular, vaccinia viruses can accumulate in immunoprivileged cells or immunoprivileged tissues, including tumors and/or metastases, and also including wounded tissues and cells. Yet, unlike other oncolytic viruses, vaccinia virus can typically be cleared from the subject to whom the viruses are administered by activity of the subject's immune system, and hence are less toxic than other viruses such as adenoviruses.
- viruses can typically be cleared from the subject to whom the viruses are administered by activity of the subject's immune system, viruses can nevertheless accumulate, survive and proliferate in immunoprivileged cells and tissues such as tumors, because such immunoprivileged areas are isolated from the host's immune system.
- Vaccinia viruses also can be easily modified by insertion of heterologous genes. This can result in the attenuation of the virus and/or permit delivery of therapeutic proteins.
- the vaccinia virus genome has a large carrying capacity for foreign genes, where up to 25 kb of exogenous DNA fragments (approximately 12% of the vaccinia genome size) can be inserted.
- the genomes of several of the vaccinia strains have been completely sequenced, and many essential and nonessential genes identified. Due to high sequence homology among different strains, genomic information from one vaccinia strain can be used for designing and generating modified viruses in other strains.
- the techniques for production of modified vaccinia strains by genetic engineering are well established (Moss (1993) Curr. Opin. Genet. Dev. 3:86-90; Broder and Earl, (1999) Mol. Biotechnol. 13:223-245; Timiryasova et al. (2001) Biotechniques 31:534-540).
- vaccinia viruses have been demonstrated to exhibit antitumor activities.
- nude mice bearing non-metastatic colon adenocarcinoma cells were systemically injected with a WR strain of vaccinia virus modified by having a vaccinia growth factor deletion and an enhanced green fluorescence protein inserted into the thymidine kinase locus.
- the virus was observed to have antitumor effects, including one complete response, despite a lack of exogenous therapeutic genes in the modified virus (McCart et al. (2001) Cancer Res. 1:8751-8757).
- VMO vaccinia melanoma oncolysate
- LIVP strains of vaccinia virus also have been used for the diagnosis and therapy of tumors, and for the treatment of wounded and inflamed tissues and cells (see e.g., Lin et al. (2007) Surgery 142:976-983; Lin et al. (2008) J. Clin. Endocrinol. Metab. 93:4403-7; Kelly et al. (2008) Hum. Gene Ther. 19:774-782; Yu et al. (2009) Mol. Cancer Ther. 8:141-151; Yu et al. (2009) Mol. Cancer 8:45; U.S. Pat. Nos. 7,588,767; 8,052,968; and U.S. Publication No. U.S. 2004/0234455).
- LIVP strains when intravenously administered, LIVP strains have been demonstrated to accumulate in internal tumors at various loci in vivo, and have been demonstrated to effectively treat human tumors of various tissue origin, including, but not limited to, breast tumors, thyroid tumors, pancreatic tumors, metastatic tumors of pleural mesothelioma, squamous cell carcinoma, lung carcinoma and ovarian tumors.
- LIVP strains of vaccinia exhibit less toxicity than WR strains of vaccinia virus, and result in increased and longer survival of treated tumor-bearing animal models (see, e.g., U.S. Publication No. U.S. 2011/0293527).
- Vaccinia is a cytoplasmic virus, thus, it does not insert its genome into the host genome during its life cycle.
- Vaccinia virus has a linear, double-stranded DNA genome of approximately 180,000 base pairs in length that is made up of a single continuous polynucleotide chain (Baroudy et al. (1982) Cell 28:315-324). The structure is due to the presence of 10,000 base pair inverted terminal repeats (ITRs). The ITRs are involved in genome replication.
- Genome replication is believed to involve self-priming, leading to the formation of high molecular weight concatemers (isolated from infected cells) which are subsequently cleaved and repaired to make virus genomes (see, e.g., Traktman, P., Chapter 27, Poxvirus DNA Replication, pp. 775-798, in DNA Replication in Eukaryotic Cells, Cold Spring Harbor Laboratory Press (1996)).
- the genome contains approximately 250 genes.
- the non-segmented, non-infectious genome is arranged such that centrally located genes are essential for virus replication (and are thus conserved), while genes near the two termini effect more peripheral functions such as host range and virulence.
- Vaccinia viruses practice differential gene expression by utilizing open reading frames (ORFs) arranged in sets that, as a general principle, do not overlap.
- ORFs open reading frames
- Vaccinia virus possesses a variety of features for use in cancer gene therapy and vaccination including broad host and cell type range, and low toxicity. For example, while most oncolytic viruses are natural pathogens, vaccinia virus has a unique history in its widespread application as a smallpox vaccine that has resulted in an established track record of safety in humans. Toxicities related to vaccinia administration occur in less than 0.1% of cases, and can be effectively addressed with immunoglobulin administration.
- vaccinia virus possesses a large carrying capacity for foreign genes (up to 25 kb of exogenous DNA fragments, approximately 12% of the vaccinia genome size, can be inserted into the vaccinia genome) and high sequence homology among different strains for designing and generating modified viruses in other strains.
- Techniques for production of modified vaccinia strains by genetic engineering are well established (Moss (1993) Curr. Opin. Genet. Dev. 3: 86-90; Broder and Earl (1999) Mol. Biotechnol. 13: 223-245; Timiryasova et al. (2001) Biotechniques 31: 534-540).
- Vaccinia virus strains have been shown to specifically colonize solid tumors, while not infecting other organs (see, e.g., Zhang et al. (2007) Cancer Res. 67:10038-10046; Yu et al. (2004) Nat. Biotech. 22:313-320; Heo et al. (2011) Mol. Ther. 19:1170-1179; Liu et al. (2008) Mol. Ther. 16:1637-1642; Park et al. (2008) Lancet Oncol. 9:533-542).
- Coxsackie virus belongs to the genus Enterovirus and the family Picornaviridae and has a positive-sense single-stranded RNA genome that does not integrate into the host cell genome. CVs are classified into groups A and B, based on their effects in mice, and can cause mild upper respiratory tract infections in humans (Bradley et al. (2014) Oncolytic Virotherapy 3:47-55). Commonly investigated coxsackie viruses for oncolytic virotherapy include attenuated coxsackie virus B3 (CV-B3), CV-B4, CV-A9 and CV-A21 (Yla-Pelto et al. (2016) Viruses 8, 57).
- CV-A21 infects cells via the ICAM-1 (or CD54) and DAF (or CD55) receptors, which are expressed at much higher levels in tumor cells, including melanoma, breast, colon, endometrial, head and neck, pancreatic and lung cancers, as well as in multiple myeloma and malignant glioma.
- CV-A21 has shown promising preclinical anticancer activity in vitro against malignant myeloma, melanoma, prostate, lung, head and neck, and breast cancer cells lines, and in vivo in mice bearing human melanoma xenografts, and against primary breast cancer tumors as well as their metastases in mice (Yla-Pelto et al.
- CV-A21-DAFv also known as CAVATAKTM
- CAVATAKTM binds only to the DAF receptor, which can contribute to its enhanced tropism towards cancer cells
- CV-A21 also has been studied in combination with doxorubicin hydrochloride, exhibiting enhanced oncolytic efficiency compared to either treatment alone against human breast, colorectal and pancreatic cancer cell lines, as well as in a xenograft mouse model of human breast cancer (Yla-Pelto et al. (2016)). Since a significant portion of the population has already developed neutralizing antibodies against CV, CV-A21 therapy has been combined with immunosuppressants such as cyclophosphamide (Bradley et al. (2014)) and is a good candidate for delivery via vehicle cells.
- Clinical trials have investigated the use of CAVATAKTM in patients with stage Mc or IV malignant melanoma (NCT01636882; NCT00438009; NCT01227551), and CAVATAKTM alone or in combination with low dose mitomycin C in patients with non-muscle invasive bladder cancer (NCT02316171). Clinical trials also have studied the effects of intravenous administration of CV-A21 in the treatment of solid tumors including melanoma, breast and prostate cancer (NCT00636558).
- CAVATAKTM in combination with pembrolizumab for treatment of patients with non-small cell lung cancer (NCT02824965, NCT02043665) and bladder cancer (NCT02043665); CAVATAKTM in combination with ipilimumab in patients with uveal melanoma and liver metastases (NCT03408587) and in patients with advanced melanoma (NCT02307149); and CAVATAKTM in combination with pembrolizumab in patients with advanced melanoma (NCT02565992).
- Seneca Valley Virus is a member of the Senecavirus genus within the family Picornaviridae, that has a positive-sense single-stranded RNA genome and is selective for neuroendocrine cancers including neuroblastoma, rhabdomyosarcoma, medulloblastoma, Wilms tumor, glioblastoma and small-cell lung cancer (Miles et al. (2017) J. Clin. Invest. 127(8):2957-2967; Qian et al. (2017) J. Virol. 91(16):e00823-17; Burke, M. J. (2016) Oncolytic Virotherapy 5:81-89).
- SVV Seneca Valley Virus
- SVV isolate 001 (SVV-001) is a potent oncolytic virus that can target and penetrate solid tumors following intravenous administration and is attractive due to its lack of insertional mutagenesis as well as its selective tropism for cancer cells and its non-pathogenicity in humans and animals. Additionally, previous exposure in humans is rare, resulting in low rates of preexisting immunity (Burke, M. J. (2016) Oncolytic Virotherapy 5:81-89).
- SVV-001 has shown promising in vitro activity against small-cell lung cancer, adrenal gland cortical carcinoma, neuroblastoma, rhabdomyosarcoma, and Ewing sarcoma cell lines, and in vivo activity in orthotopic xenograft mouse models of pediatric GBM, medulloblastoma, retinoblastoma, rhabdomyosarcoma and neuroblastoma (Burke (2016)).
- NTX-010 an oncolytic SVV-001 developed by Neotropix®, has proven feasible and tolerable for the treatment of pediatric patients with relapsed/refractory solid tumors alone or in combination with cyclophosphamide, but was limited in its therapeutic efficacy due to the development of neutralizing antibodies (Burke et al. (2015) Pediatr. Blood Cancer 62(5):743-750).
- Clinical trials include studies utilizing SV-001 in patients with solid tumors with neuroendocrine features (NCT00314925), NTX-010/SVV-001 in combination with cyclophosphamide in patients with relapsed or refractory neuroblastoma, rhabdomyosarcoma, Wilms tumor, retinoblastoma, adrenocortical carcinoma or carcinoid tumors (NCT01048892), and NTX-010/SVV-001 in patients with small cell lung cancer after chemotherapy (NCT01017601).
- cells that serve as viral delivery vehicles are selected based on their ability to exhibit certain characteristics in vivo, such as promoting amplification of the virus, thereby increasing infection of the tumor/cancer and the subsequent potential for oncolysis; and overcoming innate (e.g., NK cell mediated) and adaptive (e.g., T cell mediated) immune barriers, and/or mixed innate/adaptive immune barriers (e.g., ⁇ T cell mediated).
- T cells are subdivided into two major populations distinguished by their surface expression of ⁇ and ⁇ T cell receptors (TCR).
- the gamma delta ( ⁇ ) T cells are the prototype of ‘unconventional’ T cells and represent a relatively small subset of T cells (For an overview, see Wu et al., Int. J. Biol. Sci., 10(2):119-135 (2014); Moser and Eberl, Immunol. Reviews, 215(1):89-102 (2007), the contents of which are incorporated by reference herein). They are defined by expression of heterodimeric T-cell receptors (TCRs) composed of ⁇ and ⁇ chains. This sets them apart from the more prevalent CD4+ helper T cells and CD8+ cytotoxic T cells that express ⁇ TCRs.
- TCRs heterodimeric T-cell receptors
- ⁇ T cells The majority of ⁇ T cells are activated in an MHC-independent manner, in contrast to the MHC-restricted ⁇ T cells.
- ⁇ T cells can recognize a variety of structurally different ligands that vary in size, composition and molecular structure, including but not limited to non-peptidic antigens, MHC and non-MHC cell surface molecules, soluble proteins, sulfatide and the like.
- ⁇ T cells can recognize MHC molecules such as group 1 (CD1a, b, c) and group 2 (CD1d) CD1 molecules (adaptive immunity).
- NKG2D associated with NK cell-mediated immunity
- V ⁇ 9V ⁇ 2 T cells a ⁇ T cell population
- NKG2D ligands are not expressed by most normal tissues but are upregulated by many tumor-cell types, which are required for tumor cell-recognition by V ⁇ 9V ⁇ 2 T cells.
- Some soluble proteins also are involved in the recognition by ⁇ T cells, for example, bacterial proteins including the unrelated staphylococcal enterotoxinA (SEA) and the toxin listeriolysin O (LLO).
- SEA staphylococcal enterotoxinA
- LLO listeriolysin O
- ⁇ T cells also can recognize heat shock proteins (HSPs), which does not need antigen processing and can occur in the absence of any antigen presenting cells (APCs).
- HSPs heat shock proteins
- Non-peptide antigens can be important targets for T-cell recognition, such as those occurring during infections with fungus, bacteria, or protozoa.
- Butyrophilin (BTN3A1) has been identified as phosphorylated antigen-presenting molecule (APM) to V ⁇ 9V ⁇ 2 T cells, which belongs to a family of immunoglobulin-like molecules with immunomodulatory functions. It plays an important role in V ⁇ 9V ⁇ 2 TCR recognition of prenyl pyrophosphates and can function as a sensor for the intracellular levels of phosphorylated antigens.
- Certain cell vehicles such as mesenchymal stem cells (MSCs), have been shown to promote viral amplification and overcome innate/adaptive immune barriers even in allogeneic settings, in part due to their immunosuppressive properties.
- MSCs mesenchymal stem cells
- ADSCs adipose-derived stem cells
- allogeneic cell lines including allogeneic mesenchymal stem cells such as ADSCs as delivery vehicles
- ADSCs allogeneic mesenchymal stem cells
- subject-specific differences that sometimes lead to a “mismatch” (insufficient viral amplification; insufficient evasion of the subject's immune system and/or insufficient immunosuppression, including transient or local immunosuppression), in part due to anti-cell vehicle cytotoxic IFN ⁇ -mediated responses.
- These innate and/or adaptive immune responses can compromise therapeutic efficacy, e.g., by eliminating the cell vehicles or inducing an anti-viral state.
- Other studies also have shown that MHC-mismatched MSCs sometimes are not immune privileged (Berglund et al.
- assays (“matching” assays), one or a combination of which can be used to identify a cell vehicle as being “matched” with a subject for delivery of an oncolytic virus to the subject.
- the assays provided herein measure subject-specific responses to cell vehicle-mediated delivery of a virus, thereby identifying whether a cell vehicle is suitable for administering a virus to the specific subject, i.e., whether it is “matched” to the subject.
- Any one of the assays A-F summarized below and then elucidated in greater detail herein, or any combination thereof, can be used to identify a cell vehicle that is matched with a subject of interest.
- One or more of the assays A-F can be used to screen a single cell vehicle of interest for its suitability as a match for a subject, or more than one or a plurality/panel of cell vehicles can be screened and ranked according to their desirability as a match for a subject, in general #1 being the highest rank and subsequent numbers (2, 3, 4, . . . etc.) indicating lower ranks, although any suitable ranking system to identify suitable match(es) can be used.
- the ranking can be based on a single assay, if only one of the assays A-F is performed, or can be a combined ranking based on the performance of the cell vehicles in more than one assay.
- a haplotype is a set of DNA variations or polymorphisms that are inherited together, and can refer to a group of alleles or a set of single nucleotide polymorphisms (SNPs) located on the same chromosome.
- SNPs single nucleotide polymorphisms
- MHC Major Histocompatibility Complex
- the major histocompatibility complex (MHC) on chromosome 6 comprises the human leukocyte antigen (HLA) genes, which encode a set of cell surface proteins essential for antigen presentation for the adaptive immune system. MHC molecules bind antigens derived from pathogens and display them on the cell surface for recognition by the appropriate T-cells, thus mediating the interactions of immune cells with each other and with other cells.
- HLA human leukocyte antigen
- the MHC determines compatibility of donors for organ transplant, as well as one's susceptibility to an autoimmune disease via cross-reacting immunization.
- MHC class I bind peptides in the rough endoplasmic reticulum that are derived from intracellular proteins. They are found on all nucleated cells and interact with CD8 receptors on the surfaces of cytotoxic T lymphocytes (CTLs), mediating cellular immunity.
- CTLs cytotoxic T lymphocytes
- MHC class I comprises three ⁇ -chain genes: HLA-A, HLA-B and HLA-C.
- MHC class II molecules which bind peptides from phagocytized proteins, are expressed by antigen-presenting cells (APCs), including macrophages and dendritic cells (DCs), and interact with CD4 receptors on the surfaces of helper T cells, mediating adaptive immunity.
- APCs antigen-presenting cells
- DCs dendritic cells
- MHC class II comprises three pairs of ⁇ - and ⁇ -chain genes: HLA-DP, HLA-DQ and HLA-DR, with the HLA-DR cluster containing an extra ⁇ -chain that can pair with the DR ⁇ chain, resulting in four types of MHC class II molecules.
- HLA haplotype The combination of HLA alleles that is present on a single chromosome is called the HLA haplotype.
- HLA loci are among the most polymorphic in the human genome, with more than 12,000 alleles for class I and more than 4,000 alleles for class II. It is thus unlikely for two individuals to possess the same HLA haplotype (Meyer et al. (2016) Immunogenetics 70:5-27).
- MHC class I comprises HLA-A, HLA-B and HLA-C molecules. Individual loci are designated by upper-case letters, for example, HLA-A, and alleles are designated by numbers following an asterisk, for example HLA-A*0201. Since MHC alleles are co-dominantly expressed and each person carries 2 alleles of each of the 3 MHC class I genes, there are six possible different types of MHC class I (Janeway C A Jr., et al., “Immunobiology: The Immune System in Health and Disease.” 5th edition. New York: Garland Science; 2001. The major histocompatibility complex and its functions. Available from ncbi.nlm.nih.gov/books/NBK27156/).
- MHC class I molecules are expressed by most cell types and bind peptides derived from intracellular proteins, after they have been degraded by the proteasome and translocated to the endoplasmic reticulum, then traffic the peptides to the cell surface, and present them to cytotoxic CD8 T cells. These peptides are short and are typically 8-11 amino acids long (Kaczmarek et al. (2017) Arch. Immunol. Ther. Exp. 65:201-214; Reeves and James (2016) Immunology 150:16-24).
- MHC class II comprises the HLA-DP, HLA-DQ and HLA-DR isotypes, each containing an alpha and a beta chain that are highly polymorphic, with the exception of the DR alpha chain. Every individual inherits a pair of HLA-DP genes, a pair of HLA-DQ genes, one HLA-DRA gene and one or more HLA-DRB genes from their parents, such that a heterozygote can have 8 different MHC class II molecules on their cells.
- MHC class II molecules are expressed by antigen-presenting cells, including DCs, B cells and monocytes/macrophages, and bind to peptides from proteins derived from phagocytosed pathogens after they have been degraded by lysosomes, then traffic them to the cell surface, and present them to helper T cells.
- These peptides are longer than the peptides presented by MHC class I molecules, and are usually 14-20 amino acid residues long (Kaczmarek et al. (2017) Arch. Immunol. Ther. Exp. 65:201-214).
- MHC Class IB (Including MIC, HLA-E)
- MHC class IB genes which include members of the MIC gene family, HLA-G and HLA-E.
- MICA and MICB are expressed, particularly in epithelial cells and fibroblasts, and play a role in innate immunity.
- the MIC receptor which is expressed by NK cells and T cells, such as ⁇ T cells, is comprised of an NKG2D chain (an activating member of the NKG2 family of NK cell receptors), and a signaling protein called DAP10.
- HLA-E complexes with a specific subset of peptides derived from the leader peptides of other HLA class I molecules, and the peptide:HLA-E complex binds to the inhibitory NKG2A receptor on NK cells, resulting in the inhibition of NK cell cytotoxic activity (Janeway C A Jr., et al., “Immunobiology: The Immune System in Health and Disease.” 5th edition. New York: Garland Science; 2001. The major histocompatibility complex and its functions. Available from ncbi.nlm.nih.gov/books/NBK27156/).
- the CD1 family which is expressed mainly on antigen-presenting cells and thymocytes and presents antigens to CD4 + T cells, CD8 + T cells, double negative T cells, ⁇ T cells, iNKT cells and NKT cells, is a family of MHC class I-like genes that lie outside the MHC region. Unlike MHC class I and class II molecules, CD1 molecules are capable of binding and presenting lipid antigens. There are five CD1 proteins, CD1a-e, with CD1a-d displaying lipid antigens on the cell surface.
- CD1a-c which are expressed mostly by antigen-presenting cells, present antigens to clonally diverse T cells that mediate adaptive immunity, while CD1d molecules are expressed by several cell types, including DCs, B cells, monocytes, macrophages, keratinocytes and gastrointestinal epithelial cells, and present antigens to NKT cells (Kaczmarek et al. (2017) Arch. Immunol. Ther. Exp. 65:201-214).
- NK cells express killer Ig-like receptors (KIRs) that recognize and bind to MHC class I molecules (KIR ligands).
- KIRs killer Ig-like receptors
- P pseudogene
- NK cells also possess activating KIRs. The binding of inhibitory KIRs to their ligands inactivates the NK cells.
- KIR molecules are highly polymorphic and the KIR gene clusters lead to two distinct haplotypes, known as group A and group B haplotypes.
- Group A haplotypes consist of a fixed number of genes and have only inhibitory KIRs, while group B haplotypes have a variable set of genes and include both inhibitory and activating KIRs (Benson Jr. and Caligiuri (2014) Cancer Immunol Res. 2(2):99-104).
- KIR molecules and their ligands are inherited independently, the inheritance of specific KIR/HLA combinations have been associated with susceptibility or resistance to viral infection, autoimmunity and cancer.
- inhibitory KIR/HLA interactions prevent the lysis of cancer cells, but KIR-ligand mismatch leads to increased tumor cell lysis in patients receiving allogeneic donor NK cells (Benson Jr. and Caligiuri (2014) Cancer Immunol Res. 2(2):99-104).
- a haplotype matching analysis can be conducted as follows:
- Obtain whole blood or an alternate source of DNA e.g., soft tissue samples, semen, saliva, skin cells, hair roots, etc.
- DNA e.g., soft tissue samples, semen, saliva, skin cells, hair roots, etc.
- the genetic polymorphism profile of the subject is compared with the genetic polymorphism profiles of a cell vehicle or more than one cell vehicle or a panel of cell vehicles.
- Cell vehicles that have at least 10%, 20%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% or more matching loci with the subject can be identified as matches for delivery of a virus to the subject.
- the genetic polymorphism profile of the cell vehicle at one or more of the loci indicated in iii matches 100% with the genetic polymorphism profile of the subject.
- the genetic polymorphism profile of the cell vehicle at one or more of the loci indicated in iii matches at least 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95% with the genetic polymorphism profile of the subject, or is a match of between at or about 50% to at or about 99% with the genetic polymorphism profile of the subject, to be identified as a matching cell vehicle for the subject.
- an in silico software algorithm/program can be used to identify the loci that are predictive of compatibility and guide the identification of the most compatible matches.
- migration assays are performed to measure the ability of the cell vehicle(s) to recruit/sensitize tumor/cancer cells to viral infection and/or promote viral amplification.
- the migration assays can be set up in standard transwell, bio-gel (hydrogel, Matrigel) or extracellular matrix (collagen/fibronectin)-coated surface systems, where each of the components of the assay (e.g., solid tumor biopsy and Cell Vehicles) are deposited in separate chambers (separated by semi-permeable membrane, e.g.) or at adjacent locations, depending on the type of system.
- the method is performed as follows:
- Obtain a tumor biopsy from the subject which can include a surgical section, fine needle aspirate, needle core biopsy or primary tumor cells/tumor organoids derived after tissue processing (enzymatic digestion with Collagenase, Dispase, DNase, etc.). Culture the solid biopsy/organoids/tumor cells in the appropriate transwell/bio-gel/extracellular matrix-coated surface system.
- ii. Perform a migration assay using the tumor biopsy and one or more cell vehicles, or a panel of cell vehicles, each type of Cell Vehicle (if more than one is screened) being labelled with a unique detectable marker (e.g., fluorescent marker).
- the percent of labelled cells (for each type of Cell Vehicle) that accumulates in/migrates towards/clusters around the solid tumor biopsy, the primary tumor cells, or the tumor organoids is the cell vehicle-to-tumor migration score (CTMS), with 100% being the best and 0% being the worst, with CTMS scores of at least or about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50% to be considered a match.
- CTMS cell vehicle-to-tumor migration score
- a CTMS score of at least 20% for a cell vehicle is considered a match between the cell vehicle and the subject (or the type of tumor/cancer being treated). In other examples, obtaining a CTMS score of between about 20% to about 60% for a cell vehicle is considered a match between the cell vehicle and the subject (or the type of tumor/cancer being treated).
- iii Label the tumor biopsy or biopsy-derived primary tumor cells/organoids (e.g., using a fluorescent marker) and perform a migration assay using the labelled tumor biopsy and each of the Cell Vehicles of the sub-panel of Step 2 above, or of the entire panel if a pre-screen is not performed.
- the percent of labelled tumor cells, or tumor-associated stromal cells, migrating out of the solid tumor and towards the Cell Vehicles is the tumor-to-cell vehicle migration score (TCMS), with 100% being the best and 0% being the worst, with TCMS scores of at least or about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50% to be considered a match.
- TCMS tumor-to-cell vehicle migration score
- a TCMS score of at least 20% for a cell vehicle is considered a match between the cell vehicle and the subject (or the type of tumor/cancer being treated). In other examples, obtaining a TCMS score of between about 20% to about 60% for a cell vehicle is considered a match between the cell vehicle and the subject (or the type of tumor/cancer being treated).
- iv. Prepare samples as in ii. and iii. above, except perform the migration assay in the presence of different viruses to test if some viruses interfere with the migration of the tumor or carrier cells.
- Virus can be added directly to the co-culture or pre-loaded onto the carrier cells prior to their co-culture with the biopsy specimens. Compute the virus-corrected CTMS (VCTMS) and TCMS (VTCMS) as above, reflecting the ability of viruses to interfere with cell migration and viability.
- MRS Migration/Recruitment Score
- MRS Biopsy, Cell Vehicle, Virus combination
- VTMS Biopsy, Cell Vehicle, Virus
- VTCMS Biopsy, Cell Vehicle, Virus
- CRS Biopsy, Cell Vehicle combination
- MRS scores of at least or about 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50% for a cell vehicle can be considered a match between the cell vehicle and the subject (or type of tumor/cancer being treated).
- a MRS score of at least 20% for a cell vehicle is considered a match between the cell vehicle and the subject (or the type of tumor/cancer being treated).
- obtaining a MRS score of between about 20% to about 60% for a cell vehicle is considered a match between the cell vehicle and the subject (or the type of tumor/cancer being treated).
- This matching assay identifies Cell Vehicles/Virus-associated Cell Vehicles that have the potential to successfully home towards the tumor mass or attract/recruit migrating tumor cells, thus facilitating virus spread and infection.
- MRS scores can be used to rank viruses based on their ability not to interfere with the proper migration of particular cell vehicles, or alternatively to rank cell vehicles based on their resistance to virus-mediated suppression of cell migration, thus permitting identification of an optimal subject-specific combination of virus and carrier vehicle.
- One or more of the scores set forth in ii-v can be measured, to identify a good match.
- This matching assay measures cell vehicle-mediated viral amplification in the presence of subject-derived immune cells.
- the assay is performed as follows:
- subject-derived immune cells e.g., whole blood, PBMCs
- First incubate Cell Vehicle+Virus (range of at or about 15 min. to at or about 48 hours; in some embodiments the range is between at or about 1 hours to at or about 5 hours; in particular embodiments the incubation time is at or about 2 hours), then add to PBMCs
- iii Measure virus amplification (e.g., by fluorescence imaging or viral plaque assay (VPA)), compare against control under equivalent conditions except for the absence of PBMCs.
- VPA viral plaque assay
- virus amplification in the presence of PBMCs is under 10% of the value obtained in the absence of PBMCs, the cell vehicle is considered to be incompatible or not a match with the subject. If virus amplification in the presence of PBMCs is at least or about 10%-30% of the value obtained in the absence of PBMCs the match can be considered adequate, if virus amplification in the presence of PBMCs is at least or about 30%-80% of the value obtained in the absence of PBMCs the match can be considered moderate, if virus amplification in the presence of PBMCs is at least or about 80% or greater of the value obtained in the absence of PBMCs the match can be considered good.
- IVAS immunological virus amplification score
- IVAS (pfu (or fluorescence) of virus from Cell Vehicle+PBMC co-cultures/pfu of virus from Cell Vehicle alone). Ratio of 0.1 or more can be considered compatible, with degrees of matching as described in iv. above (10% or more of the value obtained in the absence of PBMCs, with a ratio of 1.0 being the highest).
- the IVAS score optionally can be corrected for the effect of serum (Subject/Patient Serum Resistance Screen).
- the IVAS score only takes into account cellular immunity; if the subject's serum significantly suppresses viral amplification, then even if the IVAS score is acceptable (e.g., 0.1 or greater), there nonetheless may not be a good match.
- the correction can be performed as follows:
- the Patient (Subject) Serum Resistance Score can be computed using the formula:
- PSRS (pfu without serum ⁇ pfu with serum)/pfu without serum ( ⁇ 100, to convert ratio to percent value). The higher the serum resistance score, the more the serum is interfering with viral amplification.
- IVAS (PSRS corrected) IVAS ⁇ (1-PSRS)( ⁇ 100, to convert ratio to percent value).
- ICS Immunological Compatibility Score
- Ratio of 1-1.05 or less means the Cell Vehicle has no effect on the subject's immune response, i.e., a good match
- PBMC alone and PBMC+Cell Vehicle also include the following samples: PBMCs+Virus; PBMC+Cell Vehicle+Virus
- vi. ISS % scores of higher than 0% are considered favorable, i.e., indicative of the Cell Vehicle's ability to suppress anti-viral immunity and permit the virus to infect the tumor cells. If more than one marker is measured, a mean ISS score can be computed as an average of the measured ISS scores.
- the cell vehicle or vehicles can be subjected, optionally, to a pre-screen to determine the ability of the cell vehicle to promote viral amplification in the absence of subject-specific cells.
- a pre-screen to determine the ability of the cell vehicle to promote viral amplification in the absence of subject-specific cells.
- the cell vehicle(s) or panel of available Cell Vehicles Autologous/Allogeneic/Original/Sensitized/Engineered
- the rate of viral amplification (pfu/cell) for each type of Cell Vehicle, normalized against the number of infected cells, under equivalent multiplicity of infection (MOI in the range of 0.001 to 1) and co-culture conditions is determined (e.g., using VPA—virus plaque assay).
- An optimal read out time point for each type of virus used e.g., between at or about 1 day and at or about 5 days.
- the pfu/cell for each type of cell vehicle is calculated and used as a virus amplification score (VAS) of the cell vehicle.
- VAS virus amplification score
- Cell Vehicles that produce pfu/cell of at least 10 can be selected for further screening by matching to the subject according to any of the methods summarized in A-F and described further herein (10-100 is good, 100-1000 is very good, greater than 1000 is excellent).
- the sub-panel (or selected cell vehicle or vehicles) can be screened for optimal matching with the subject.
- a match between a cell vehicle and a subject can be identified using one or more of the assays A-F as summarized above.
- more than one cell vehicle, or a plurality or panel of cell vehicles are analyzed according to one or more of the matching assays A-F.
- the cell vehicles are then ranked according to their compatibility with the subject, ranging from “best match” (e.g., Rank 1) to worst match (e.g., a higher number rank). For each cell vehicle, a cumulative rank is computed, depending on the number of assays performed:
- Cumulative Rank Rank (VAS)+Rank (IVAS)+Rank (ICS)+Rank (ISS)+Rank (MRS)/5 (if all these scores are obtained; one could obtain fewer than 5 scores).
- the cell vehicles are then ranked in order of their suitability as a match.
- Haplotype analysis also can be considered in ranking the cell vehicles.
- VPAs Virus Plaque Assays
- VPA Virus Plaque Assay
- Virus containing samples are stored at ⁇ 80° C. and subjected to a three-fold freeze ( ⁇ 80° C.)/thaw (+37° C.) cycle followed by sonication on ice-cold water for three 1 min intervals, one min apart. Sonicated samples are serially diluted in vaccinia virus infection medium (DMEM supplemented with 2% FBS, L-Glutamine and Penicillin/Streptomycin). Plaque assays are performed in 24-well plates in duplicate wells. Briefly, 200,000 CV-1 monkey kidney cells are plated in 1 mL D10 medium per well, overnight. Supernatants are aspirated and 10-fold serial dilutions of the virus-containing sample are applied to the CV-1 monolayer at 200 ⁇ L/well.
- DMEM vaccinia virus infection medium
- Plaque assays are performed in 24-well plates in duplicate wells. Briefly, 200,000 CV-1 monkey kidney cells are plated in 1 mL D10 medium per well, overnight. Supernatants are aspirated
- CMC overlay medium is prepared by autoclaving 15 g Carboxymethylcellulose sodium salt (Sigma-Aldrich, C4888) and re-suspending with overnight stirring at RT in 1 L DMEM, supplemented with Penicillin/Streptomycin, L-Glutamine, and 5% FBS, with short-term storage at 4° C.
- Plaques are counted after fixing the cells by toping the wells with Crystal Violet solution (1.3% Crystal violet (Sigma-Aldrich, C6158), 5% Ethanol (Pure Ethanol, Molecular Biology Grade, VWR, 71006-012), 30% Formaldehyde (37% v/v formaldehyde, Fisher, cat #F79-9), and double distilled water) for 3-5 h at room temperature, followed by washing the plates in tap water and drying overnight. The virus tier is calculated in plaque-forming units (PFU) per sample.
- Crystal Violet solution (1.3% Crystal violet (Sigma-Aldrich, C6158), 5% Ethanol (Pure Ethanol, Molecular Biology Grade, VWR, 71006-012), 30% Formaldehyde (37% v/v formaldehyde, Fisher, cat #F79-9), and double distilled water) for 3-5 h at room temperature, followed by washing the plates in tap water and drying overnight.
- the virus tier is calculated in plaque-forming units
- Flow cytometry can be utilized for cell counting, cell sorting and biomarker/cell surface antigen detection.
- flow cytometry can be performed using gating parameters to identify specific immune cell populations including T cells (such as, but not limited to, CD3, CD4, CD8), ⁇ T cells (e.g., CD3 + NKp46 + and CD3 + NKp46 ⁇ populations of cells and others), NK cells (such as, but not limited to, NKp46 (CD335), CD16, CD56) and NKT cells (such as, but not limited to, CD3, CD16, CD56, NKp46, aGalCer-CD1d tetramers).
- T cells such as, but not limited to, CD3, CD4, CD8
- ⁇ T cells e.g., CD3 + NKp46 + and CD3 + NKp46 ⁇ populations of cells and others
- NK cells such as, but not limited to, NKp46 (CD335), CD16, CD56
- NKT cells such
- Immune responses are evaluated by analyzing various activation/effector function parameters using flow cytometry, including, but not limited to: CD69, CD25, CD71, CD27 (CD70L), CD154 (CD40L), CD137 (4-1BB), CD44, CD45RA, CD45RO, CD278 (ICOS), CD127 (IL-7RA), CD183 (CXCR3), CD197 (CCR7), CD39, CD73, CD314 (NKG2D), PD-1, CTLA-4, IFN ⁇ / ⁇ , IFN ⁇ , TNF ⁇ , IL-2, IL-4, IL-5, IL-9, IL-10, IL-12, IL-13, IL-15, IL-18, IL-21, IL-22, IL-23, GM-CSF, IL-6, CD107a, CD107b, TGF ⁇ , Perforin, Granzyme B, G-CSF, RANTES, EXOTAXIN, MIP-1b, MIP-1, EGF, HGF, VEGF, IL
- Flow cytometry also is used to detect eGFP expression by genetically engineered ADSCs, and to measure the percentages of cells infected with L14 VV (TK-inserted Turbo-FP635 engineered LIVP strain of vaccinia virus), for example.
- L14 VV TK-inserted Turbo-FP635 engineered LIVP strain of vaccinia virus
- biomarker/antigen to be detected is on the cell surface, such as CD markers, surface staining is used. However, if intracellular proteins such as cytokines or transcription factors are to be detected, then additional fixation and permeabilization steps are required prior to antibody staining.
- co-cultures of PBMCs and stem cells are recovered by pipetting, transferred to V-bottom plates, and washed with FACS Buffer (lx PBS with 1% FBS). The cells are then surface stained for 30 min at 4° C. in FACS Buffer supplemented with the appropriate antibody cocktail.
- FACS Buffer lx PBS with 1% FBS
- CD3-PerCP/Cy5.5 BioLegend, cat #300328, at 1:50
- CD335/NKp46-PE BioLegend, cat #331908, at 1:50
- CD69-APC BioLegend, cat #310910, at 1:50
- the FACS buffer also can contain a viability probe (ThermoFisher Scientific, LIVE/DEAD Fixable Violet Dead Cell Stain Kit, for 405 nm excitation, cat #L34964, at 1:1000). After staining, the cells are washed twice with FACS Buffer, fixed in 2% PFA in 1 ⁇ PBS for 15 min at RT, washed again with FACS Buffer to remove PFA, and then analyzed on a BD FACSAria II flow cytometer (BD Biosciences, San Jose, Calif.).
- a viability probe ThermoFisher Scientific, LIVE/DEAD Fixable Violet Dead Cell Stain Kit, for 405 nm excitation, cat #L34964, at 1:1000.
- anti-human CD107a-AlexaFluor 488 BioLegend, cat. #328610
- Monensin BioLegend, cat. #420701-BL, 1000X
- NKT and T cells including ⁇ T cells
- intracellular staining is required.
- Brefeldin A solution BioLegend, cat. #420601-BL, 1000X
- Monensin BioLegend, cat. #420701-BL, 1000X
- Brefeldin A is added together.
- cells are processed using the eBioscience Intracellular Staining Buffer Set (ThermoFisher, cat. #00-5523).
- Enzyme-Linked ImmunoSpot is an immunoassay that is widely utilized for monitoring cellular immune responses, based on its sensitive and accurate identification and quantification of rare antigen-specific and cytokine-producing immune cells, and its ability to detect single positive cells within a population of PBMCs.
- ELISPOT can be used to analyze immune activation and immunosuppression, based on a panel of markers identifying specific immune cell populations such as T cells, including ⁇ T cells (such as, but not limited to, CD3, CD4, CD8), NK cells, including ⁇ T cells (such as, but not limited to, NKp46 (CD335), CD16, CD56) and NKT cells (such as, but not limited to, CD3, CD16, CD56, NKp46, aGalCer-CD1d tetramers), as well as a panel of activation/effector function markers, including, but not limited to: CD69, CD25, CD71, CD27 (CD70L), CD154 (CD40L), CD137 (4-1BB), CD44, CD45RA, CD45RO, CD278 (ICOS), CD127 (IL-7RA), CD183 (CXCR3), CD197 (CCR7), CD39, CD73, CD314 (NKG2D), PD-1, CTLA-4, I
- T cells including
- ELISPOT assays are very similar in technique to sandwich enzyme-linked immunosorbent assays (ELISAs).
- ELISAs sandwich enzyme-linked immunosorbent assays
- the PVDF membranes are prepared in 96-well plates by incubating in 35% ethanol for 30s, followed by washing with 200 ⁇ l/well phosphate buffered saline (PBS) 3 times to remove ethanol.
- PBS phosphate buffered saline
- the plates are then coated with capture antibody (diluted in PBS to approximately 2-15 ⁇ g/ml, 100 ⁇ l/well), specific for the analyte of interest, and incubated overnight at 4° C.
- the wells are then emptied and washed 3 times with 200 ⁇ l/well PBS to remove unbound capture antibody, and the membranes are blocked, for example, using 100 ⁇ l/well 2% dry skim milk or 200 ⁇ l/well 1% BSA in PBS, and incubated for 2 h at room temperature, to prevent non-specific binding to the membrane.
- the plates are then washed with 200 ⁇ l/well PBS 3 times and air dried, then used in the next step or stored at 4° C. with desiccant, for up to 2 weeks.
- the cells for example, PBMCs
- PBMCs are diluted and pipetted into the wells, typically with 2 ⁇ 10 4 to 5 ⁇ 10 5 PBMCs per well, the appropriate culture medium is added and the plates are placed in a humidified 37° C. CO 2 incubator for a specified period of time, usually 24-72 h, for example, 24 h for IFN ⁇ , IL-2 and TNF ⁇ , and 48 h for IL-4, IL-5 and IL-10.
- Cytokines such as IFN ⁇ , that are secreted by activated cells bind the immobilized antibody on the PVDF membrane.
- the wells are washed 3 times with 200 ⁇ l/well PBS, then 3 times with 200 ⁇ l/well PBS/0.1% Tween-20 to wash away cells and unbound analyte, and a biotinylated detection antibody, specific for the analyte of interest, diluted to approximately 0.25-2 ⁇ g/well in PBS/1% BSA (100 ⁇ l/well) is added and incubated for 1-2 h at room temperature, or at 4° C. overnight.
- the plates are then washed 3-4 times with 200 ⁇ l/well PBS 0.1% Tween-20 to remove any unbound biotinylated, and streptavidin conjugated to an enzyme, such as horseradish peroxidase (HRP) or alkaline phosphatase (AP) (100 ⁇ l/well, diluted to 1:500-1:2000 in PBS-Tween-BSA), is added to each well and the plates are incubated at room temperature for 1-2 h.
- HRP horseradish peroxidase
- AP alkaline phosphatase
- the detection antibody can be directly conjugated to the enzyme.
- Unbound enzyme is washed away (3 ⁇ 200 ⁇ l/well PBS/0.1% Tween-20 and 3 ⁇ 200 ⁇ l/well PBS) and a precipitating substrate solution (e.g., AEC for HRP or BCIP/NBT for AP) is added.
- a colored precipitate forms, which is red for HRP, or blackish blue for AP, and each colored spot typically represents an individual cytokine-secreting cell.
- the reaction is stopped by gently washing with distilled water, the plates/membranes are dried at room temperature, and the spots can be counted manually (e.g., with a dissecting or stereomicroscope) or with an automated ELISPOT reader. If multiple cytokines are to be measured in the same assay, fluorescently-labeled anti-cytokine antibodies are used and the modified assay is known as a FluoroSpot assay.
- PBMCs can be isolated using, e.g., Ficoll-Paque Centrifugation.
- Whole Blood includes blood cell types other than PBMCs, e.g., neutrophils.
- Whole Blood with RBC lysis Removes high number of erythrocytes and can achieve higher concentration of lymphocytes and myeloid cells. Washing steps following this lysis optionally can be performed to remove subject serum/plasma, as during Ficoll-Paque PBMC isolation.
- PBMCs/Whole Blood with RBC lysis supplemented with Autologous Subject Plasma/Serum can be isolated from heparinized human blood after high speed centrifugation, serum can be isolated after high speed centrifugation of non-heparinized and coagulated blood from the subject.
- the PBMC or whole blood cells after RBC lysis can then be incubated with 10% to 50% autologous subject serum or plasma added as a supplement.
- the complement in the serum/plasma optionally can further be inactivated thermally or pharmacologically, as needed.
- a Cell Vehicle/Virus compatibility screen is performed by analysis of co-cultures one or more Cell Vehicles and viruses to be analyzed; when more than one cell vehicle/virus combination is assessed, the methods are performed under assay equivalent conditions.
- the ability of the cell vehicle to promote Viral Amplification is measured by methods known to those of skill in the art using cell vehicles/virus that are engineered to express detectably labeled proteins, e.g., fluorescently labeled proteins. Methods known to those of skill in the art can be used including, for example:
- Fluorescence Imaging (detectable label or engineered to express fluorescent protein)
- ELISA e.g., measuring virus-encoded ß-galactosidase
- Bioluminescence e.g., virus engineered to express reporter gene luciferase
- Fluorescence Microscopy imaging software to measure fluorescence intensity
- Fluorescence Plate Reader to monitor time course of virus infection (e.g., follow Cell Vehicles on green channel (GFP), Virus on red channel (TurboFP635)).
- the rates of virus amplification are measured for each cell vehicle analyzed, using MOI (0.01-10) and co-culture periods of about 24 hours-1 week under equivalent assay conditions.
- the measured rate is normalized against the number of infected Cell Vehicles: Pfu per Cell Vehicle of 1-10 can be considered limited potency (as a Cell Vehicle for a given virus); Pfu per Cell Vehicle of 10-100 considered good potency; Pfu Cell Vehicle of 100-1000 considered very good potency; Pfu per Cell Vehicle of more than 1000 considered extremely high potency.
- Combinations of Cell Vehicles and viruses demonstrating pfu/Cell Vehicle of at least 10 can be considered for testing in the matching assays using cells derived from the subject.
- the normalized pfu per Cell Vehicle values measured under equivalent assay conditions can be used as a virus amplification score (VAS) that contributes toward ranking of a Cell Vehicle+virus combination as a match (or not) for therapy.
- VAS virus amplification score
- Subject Haplotyping data can be predictive for the patient's compatibility with a particular Cell Vehicle based on closer or more distant matching.
- HLA loci matching HLA-A, HLA-DP
- KIR haplotype matching often is suggestive of broad permissivity of a subject towards multiple allogeneic Cell Vehicles, but not conclusive.
- the predictive value of the data however can be augmented by accumulating subject matching/compatibility data into a database and using development algorithms to predict compatibility based on assay-validated correlations.
- the haplotyping method can be performed as follows:
- the Subject-Derived Immune Cells, Cell Vehicles and Viruses can be co-cultured simultaneously, or the Cell Vehicle+Virus can first be incubated (e.g., 15 min. to 48 h), then added to Subject-derived Immune Cells. After incubation times of, e.g., 24 hours to 1 week, in some embodiments, 48 hours), the following measurements are performed:
- IVAS scores of e.g., 10% or higher, 20% and higher, 30% and higher or between 10%-30% and higher can be considered adequate for consideration.
- this IVAS score (higher the percent, higher the compatibility) can be used to rank the cell vehicles from the least to the most compatible cell vehicles for each patient and for each virus.
- PSRS (pfu with no serum ⁇ pfu with serum and without complement inactivation/pfu with no serum) ⁇ 100.
- % complement suppression (pfu with serum and with complement inactivation—pfu with serum and without complement inactivation/pfu with no serum) ⁇ 100.
- ICS(NK) [ICS( p 1)+ICS( p 2)+ICS( p 3)+ICS( pn )]/ n
- ICS( T ) [ICS( p 1)+ICS( p 2)+ICS( p 3)+ICS( pn )]/ n
- ICS(NKT) [ICS( p 1)+ICS( p 2)+ICS( p 3)+ICS( pn )]/ n
- ICS[NK(1)+ T (2)+NKT(3)+ . . . E ( n )] [ICS(NK,1)+ICS( T, 2)+ICS(NKT,3)+ . . . ICS( E,n )]/ n,
- ISS (% activated effectors in PBMC+virus co-cultures+% activated effectors in PBMC+Cell Vehicle co-cultures ⁇ % activated effectors in PBMC+virus+Cell vehicle co-cultures/% activated effectors in PBMC+virus co-cultures+% activated effectors in PBMC+Cell Vehicle co-cultures) ⁇ 100,
- % activated effectors are first normalized by subtracting the background or % activated effectors in the PBMC alone controls.
- ISS(NK) [ISS( p 1)+ISS( p 2)+ISS( p 3)+ISS( pn )]/ n
- ISS( T ) [ISS( p 1)+ISS( p 2)+ISS( p 3)+ISS( pn )]/ n
- ICS(NKT) [ISS( p 1)+ISS( p 2)+ISS( p 3)+ISS( pn )]/ n
- ISS[NK(1)+ T (2)+NKT(3)+ . . . E ( n )] [ISS(NK,1)+ISS( T, 2)+ISS(NKT,3)+ . . . ISS( E,n )]/ n,
- ELISA and Luminex Assay can be used to measure the following activator/effector function parameters in the supernatants of the co-cultures:
- a cell vehicle selected as being matched with a subject according to the methods provided herein possess at least one, two, three, four, five or six of the following characteristics:
- VAS score Maximum virus amplification in the absence of subject-derived cells
- IVAS score Maximum virus amplification in the presence of subject-derived cells
- Each of these scores could be subject to additional weighting factors in an in silico analysis, when a sufficient amount of matching data is gathered from these assays.
- Each subject and cell vehicle is analyzed for their typing characteristic, e.g.,
- Data is collected from each co-culture assay of subject immune cells (PBMC/immune cells/blood) with a particular virus/cell vehicle pair to establish a databank.
- subject immune cells PBMC/immune cells/blood
- the matching compatibility scores (IVAS, ICS, ISS) established in each assay in the databank is correlated to the degree of matching between the cell vehicle and the subject's haplotype to establish negative correlations between a mismatch/mismatches at particular locus/loci and a significant negative impact on one or all of the matching compatibility scores (IVAS, ICS, ISS).
- Such correlations when found to be statistically significant, can be used to “In Silico” pre-screen and exclude inappropriate cell vehicles based on the presence of undesirable mismatches with the subject (associated with poor matching compatibility scores).
- the matching compatibility scores established for every combination of cell vehicle and virus chosen and used to treat subjects is collected in the database and further correlated with the virus amplification data obtained from the blood or tumor of the treated subjects, within the first 48 hours of treatment (range of, e.g., 24 hours to 3 days), which can be used as a measure of the actual therapeutic efficacy in vivo.
- a correlative analysis between the matching compatibility scores and the actual therapeutic efficacy in vivo can be used to adjust/improve the cumulative RANK score formula used to select optimal cell vehicles by assigning higher weighting factors to the IVAS, ICS, or ISS scores that are more closely associated/predictive of therapeutic efficacy in vivo.
- cell vehicles whose properties are modified to facilitate delivery of an oncolytic virus to a subject and/or provide improved matching with a subject.
- Any of the cell vehicles provided herein e.g., stem cells, immune cells, cancer cells
- properties can include, but are not limited to, improved facilitation of viral amplification in the cell delivery vehicle, an improved ability to evade immune responses directed against the cell vehicle and/or the virus and/or improved immunosuppression.
- the immunomodulatory capabilities e.g., evading immune responses, suppressing immune responses
- a modified cell vehicle provided herein can be screened using the matching assay provided herein (Section C) to ascertain its suitability as a cell vehicle for delivery of an oncolytic virus to a particular subject and/or a particular cancer/tumor type.
- a plurality/panel of modified cell vehicles can be screened by the matching assay provided herein and ranked in order of their matching capability.
- the panel of cell vehicles can include unmodified cell vehicles.
- modified cell vehicles provided herein can contain one or more of the modifications set forth in this section and elsewhere herein, as described:
- the cell vehicles can be sensitized to enhance their virus amplification ability by pre-treating/loading the cell vehicles with one or more of: IL-10, TGF ⁇ , VEGF, FGF-2, PDGF, HGF, IL-6, GM-CSF, Growth factors, RTK/mTOR agonists, wnt protein ligands and GSK3 inhibitors/antagonists (e.g., Tideglusib, Valproic acid).
- the cell vehicles can be sensitized to block induction of the anti-viral state, for example, by pre-treating/loading the cell vehicles with small molecule or protein inhibitors that interfere with IFN Type I/Type II receptors and/or interfere with downstream signaling including, but not limited to, IFNAR1/IFNAR2 signaling, IFNGR1/IFNGR2 signaling, STAT1/2 signaling, Jak1 signaling (e.g., Tofacitinib, Ruxolitinib, Baricitinib), Jak2 signaling (e.g., SAR302503, LY2784544, CYT387, NS-018, BMS-911543, AT9283), IRF3 signaling, IRF7 signaling, IRF9 signaling, TYK2 signaling (e.g., BMS-986165), TBK1 signaling (e.g., BX795, CYT387, AZ13102909).
- IFNAR1/IFNAR2 signaling IFNGR
- the cell vehicles can be pre-treated/loaded with HDAC inhibitors for interfering with/deregulating IFN signaling/responsiveness; such inhibitors can include, but are not limited to, Vorinostat, Romidepsin, Chidamide, Panobinostat, Belinostat, Valproic acid, Mocetinostat, Abexinostat, Entinostat, SB939, Resminostat, Givinostat, Quisinostat, HBI-8000, Kevetrin, CUDC-101, AR-42, CHR-2845, CHR-3996, 4SC-202, CG200745, ACY-1215, ME-344, Sulforaphane and/or Trichostatin.
- HDAC inhibitors can include, but are not limited to, Vorinostat, Romidepsin, Chidamide, Panobinostat, Belinostat, Valproic acid, Mocetinostat, Abexinostat, Entinostat, SB939, Resminostat, Givinostat, Quisin
- the cell vehicles can be pre-treated/loaded with antagonists of virus sensing and/or anti-virus defense pathways mediated by STING, PKR, RIG-1, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, DAI (ZBP1); such antagonists can include, but are not limited to, one or more of K1, E3L, K3L proteins (Vaccinia), NS1/NS2 proteins (Influenza), NS3-4A (Hepatitis C), NP and Z proteins (Arenavirus), VP35 (Ebola virus), US11, ICP34.5, ICP0 (HSV), M45 (MCMV) and X protein (BDV: Borna Disease Virus).
- antagonists can include, but are not limited to, one or more of K1, E3L, K3L proteins (Vaccinia), NS1/NS2 proteins (Influenza), NS3-4A (Hepatitis C), NP and Z proteins (Arenavirus), VP35 (Ebola virus), US
- the cell vehicles can be protected against allogeneic inactivation/rejection determinants, such as by pre-treating/loading the cells with MHC antagonists of viral origin, e.g., one or more of A40R MHCI antagonist (Vaccinia), Nef and TAT (HIV), E3-19K (Adenovirus), ICP47 (HSV-1/2), CPXV012 and CPXV203 (Cowpox), ORF66 (VZV), EBNA1, BNLF2a, BGLF5, BILF1 (EBV), US2/gp24, US3/gp23, US6/gp21, US10, US11/gp33 (hCMV), Rh178/VIHCE (RhCMV), U21 (HHV-6/7), LANA1, ORF37/SOX, kK3/MIR1, kK5/MIR2 (KSHV), mK3 (MHV-68), UL41/vhs (a-herpesvirus, HSV
- the modified cell vehicles provided herein can be pre-treated/loaded with B2 M antagonists of viral origin, e.g., UL18 (HCMV).
- the cell vehicles can be pre-treated/loaded with antagonists of MIC-A and MIC-B (NKG2D ligands), e.g., kK5 (KHSV).
- the cell vehicles can be pre-treated/loaded with one or more immunosuppressing factors of viral origin including, but not limited to, inhibitors of immune FAS/TNF/Granzyme B-induced apoptosis (e.g., Ectromelia/Vaccinia virus SP1-2/CrmA), IL-1/NFkB/IRF3 antagonists (e.g., Vaccinia virus-encoded N1), IL-1 and TLR antagonists (e.g., IL-18 binding protein, A46R, A52R), IL-10 antagonists (e.g., B15R/B16R), TNF ⁇ blockers (e.g., Vaccinia virus CmrC/CmrE), IFN ⁇ / ⁇ blockers (e.g., Vaccinia virus B18R/B19R) and IFN ⁇ blockers (e.g., Vaccinia virus B8R).
- the cell vehicles can be pre-treated/loaded with small molecule inhibitors of TAP
- the modified cell vehicles provided herein can be protected against complement by, e.g., pre-treating/loading the cell vehicles with small molecule inhibitors of complement factors (e.g., C1, C2, C3, C4, C5, MBL); such inhibitors can include, but are not limited to, one or more of VCP (Vaccinia virus complement control protein), B5R (Vaccinia virus complement inhibitor), scFv anti-CD1q/CD1r/CD1s, anti-C3, anti-05 (e.g., Eculizumab), peptidic C3 inhibitors of the compstatin family (e.g., Cp40), Human soluble membrane (s/m) proteins (e.g., s/mCR1 (CD35), s/mCR2 (CD21), s/mCD55, s/mCD59), Human Factor H and derivatives, Cobra venom factors and derivatives with complement inhibitory activity.
- VCP Vaccinia virus complement control protein
- B5R Vaccinia virus complement
- the sensitized cell vehicles can be generated by methods known in the art.
- the cell vehicles can be pre-treated with the sensitizing agents, e.g., proteins or small molecule agonists/antagonists by incubation for between 10 minutes to 48 or more hours prior to cell banking, virus infection or administration to the subject, e.g., about or at least for 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 or 60 minutes or about or at least 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47 or 48 or more hours prior to cell banking, virus infection or administration to subject.
- the sensitizing agents e.g., proteins or small molecule agonists/antagonists
- lipofectamine or alternative protein transfection reagents can be used, such as, for example, Xfect (Takara), Pierce Pro-Ject (ThermoFisher), Pro-DeliverIN (OZ Biosciences), TurboFect (Fermentas), or alternative.
- the modified cell vehicles provided herein can, in some embodiments, be pre-treated/loaded with one or more agents that render the cell vehicles resistant to virus-mediated killing.
- the cell vehicles can be pretreated with Type I and/or Type II interferons.
- the cell vehicles can be pretreated with agonists/inducers of anti-viral state (e.g., STING, PKR, RIG-I, MDA-5).
- any autologous or allogeneic cell vehicles can be treated with Interferon Type I (e.g., IFN ⁇ / ⁇ ) and/or Type II (e.g., IFN ⁇ ) and/or agonists of STING, PKR, RIG-I, MDA-5, OAS-1/2/3, AIM-2, MAVS, RIP-1/3, DAI (ZBP1) pathways for between 30 minutes to up to 48 or more hours, e.g., about or at least 30 minutes or 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47 or 48 or more hours without or prior to virus infection.
- Interferon Type I e.g., IFN ⁇ / ⁇
- Type II e.g., IFN ⁇
- ZBP1 DAI
- protected cell vehicles can be administered as a separate composition concurrently with a matched/sensitized/engineered cell vehicle that is not so protected and includes the virus; the protected cell vehicles can provide extended survival and/or improved local immunosuppression.
- the protected cell vehicles can be administered within, for example, about or at least 10, 15, 20, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47 or 48 hours or 1, 2, 3, 4 or 5 days prior to or after administering the matched/sensitized/engineered cell vehicle that is not so protected and includes the virus.
- modified cell vehicles that are engineered for transient or permanent expression or suppression of genes to facilitate improved viral amplification and/or immunomodulation.
- the cell vehicles can be engineered in one or more of the following embodiments. Any of the cell vehicles provided herein can be modified using one or a combination of the embodiments for sensitizing, protecting and/or engineering the cell vehicles as provided herein.
- the cell vehicles can be engineered to be unresponsive to an interferon (IFN)-induced antiviral state.
- the cell vehicles can be engineered for transient or permanent (excising the gene locus, e.g.) suppression of IFN Type I/Type II receptors and/or downstream signaling such as, for example, suppression of one or more of Type I/Type II interferon receptor expression; IFN ⁇ / ⁇ , IFN ⁇ receptor expression; IFNAR1/IFNAR2 receptor expression; IFNGR1/IFNGR2 receptor expression; STAT1/2 receptor expression; Jak1/2 receptor expression; IRF3 receptor expression; IRF7 receptor expression; IRF9 receptor expression; TYK2 kinase expression and TBK1 kinase expression.
- IFN interferon
- the cell vehicles can be engineered for transient or permanent suppression of elements of the cytosolic viral DNA/RNA-sensing and anti-viral defense machinery including, but not limited to, one or more of PKR, RIG-I, MDA-5, cGAS, STING, TBK1, IRF3, OAS-1/2/3, AIM2, MAVS, RIP-1/3 and DAI (ZBP1).
- elements of the cytosolic viral DNA/RNA-sensing and anti-viral defense machinery including, but not limited to, one or more of PKR, RIG-I, MDA-5, cGAS, STING, TBK1, IRF3, OAS-1/2/3, AIM2, MAVS, RIP-1/3 and DAI (ZBP1).
- the cell vehicle can be engineered for transient or permanent expression of antagonists of virus-sensing and anti-viral defense pathways mediated by, e.g., STING, PKR, RIG-1, MDA-5, OAS-1/2/3, AIM2, MAVS, RIP-1/3, DAI (ZBP1); these can include, but are not limited to, one or more of K1, E3L, K3L (Vaccinia); NS1/NS2 (Influenza A); NS3-4A (Hepatitis C); NP, Z protein (Arenavirus); VP35 (Ebola virus); US11, ICP34.5, ICP0 (HSV); M45 (MCMV); and X protein (BDV: Borna Disease Virus).
- the modified cell vehicles provided herein can be engineered to evade allogeneic recognition by one or more of T and NKT cells, and the adaptive immune response(s) of ⁇ T cells.
- the cell vehicles can be engineered for transient or permanent suppression of expression of one or more of: MHC Class I molecules (HLA-A, B, C); MHC Class II molecules (HLA-DP, DQ, DR); MHC-like molecules (CD1a/b/c/d); or regulators of transcription or expression of MHC Class I, MHC Class II, MHC-like molecules (e.g., TAP1/2, Tapasin, Beta-2 microglobulin, CIITA, RFXANK, RFX5 and RFXAP).
- MHC Class I molecules HLA-A, B, C
- MHC Class II molecules HLA-DP, DQ, DR
- MHC-like molecules CD1a/b/c/d
- regulators of transcription or expression of MHC Class I, MHC Class II, MHC-like molecules
- the cell vehicles can be engineered for transient or permanent expression of one or more of: B2 M Antagonists of Viral Origin (e.g., UL18 (HCMV); and/or MHC Antagonists of Viral Origin (e.g., one or more of A40R WWI (Vaccinia); Nef, TAT (HIV); E3-19K (Adenovirus); ICP47 (HSV-1/2); CPXV012, CPXV203 (Cowpox); EBNA1, BNLF2a, BGLF5, BILF1 (EBV); ORF66 (VZV); US2/gp24, US3/gp23, US6/gp21, US10, US11/gp33 (hCMV); rh178/VIHCE (RhCMV); U21 (HHV-6/7); LANA1, ORF37/SOX, kK3/MIR1, kK5/MIR2 (KHSV); mK3 (MHV-68); UL41/vh
- the cell vehicles can be engineered to evade allogeneic recognition by NK Cells and/or the innate immune response(s) of ⁇ T cells.
- the cell vehicles can be engineered for transient or permanent suppression of expression of one or more of: Membrane-Bound MICAS (NKG2D Ligands); Membrane-Bound PVR (DNAM-1 Ligand); Membrane-Bound Nectin-2 (DNAM-1 Ligand).
- the cell vehicles can be engineered for transient or permanent expression of one or more of:
- NSG2D ligands e.g., kK5 (KHSV)
- antagonists of the NKG2D receptor e.g., Cowpox OMCP
- antagonists of NCR-targeting NKp30, NKp44, NKp46 receptors e.g., HA (hemagglutinin—in vaccinia and other viruses)
- ligands for the NK inhibitory receptors KIR
- HLA-Bw4; HLA-C2 ligands for the NK inhibitory receptors
- NKG2a/CD94 e.g., HLA-E and derivatives alone or combined with 21 M HLA-B ligands to generate HLA-E binding peptides and stabilize HLA-E surface expression.
- the cell vehicles can be engineered to express immunosuppressive factors of human or viral origin (e.g., to prevent/inhibit allogeneic anti-cell vehicle or anti-viral immune responses).
- immunosuppressive factors of human or viral origin include, but are not limited to,
- IDO IDO, Arginase, TRAIL, iNOS, VEGF, FGF-2, PDGF, HGF, IL-6, sMICA, sMICB, sHLA-G, HLA-E, PD-L1, FAS-L, B7-H4 and single-chain antibodies (scFv) that target or deplete NK and/or NKT and/or ⁇ T cells.
- scFv single-chain antibodies
- Factors of viral origin include, but are not limited to, Ectromelia/Vaccinia virus SPI-2/CrmA (inhibitor of immune FAS/TNF/Granzyme B induced apoptosis); Vaccinia Virus encoded N1 (IL-1/NFkB/IRF3 antagonist); HA (NCR antagonists targeting NKp30, NKp44, NKp46); IL-18 binding protein; A40R; A46R; A52R; B15R/B16R; TNF ⁇ blockers (e.g., Vaccinia virus CmrC/CmrE); IFN ⁇ / ⁇ blockers (e.g., Vaccinia virus B18R/B19R); IFN ⁇ blockers (e.g., Vaccinia virus B8R) and other IL-1/IL-1 ⁇ /NF ⁇ B/IRF3/NCR/MHCI/TLR/NKG2D antagonists.
- IL-1/NFkB/IRF3 antagonist IL-1/
- the cell vehicles can be engineered to express cancer or stem cell-derived factors that facilitate viral infection of otherwise impermissive cell vehicles and/or tumor cells.
- the cell vehicles can be engineered to express one or more of: cancer associated antigens (e.g., cancer testis antigens (MAGE-A1, MAGE-A3, MAGE-A4, NY-ESO-1, PRAME, CT83, SSX2, BAGE family, CAGE family); oncofetal antigens (AFP, CEA); oncogene/tumor suppressors (myc, Rb, Ras, p53, Telomerase); differentiation antigens (MELAN, Tyrosinase, TRP-1/2, gp100, CA-125, MUC-1, ETA); GM-CSF; IL-10; TGF ⁇ ; VEGF; FGF-2; PDGF; HGF; IL-6; growth factors; RTK/mTOR agonists and wnt protein ligands.
- cancer associated antigens e.g., cancer test
- the modified cell vehicles can be engineered to express factors that interfere with the function of complement and/or neutralizing antibodies, including, but not limited to, one or more of: protein Antagonists of complement factors (C1, C2, C3, C4, C5, MBL); Vaccinia virus complement control protein (VCP); Vaccinia virus complement inhibitor (B5R); scFv anti-CD1q/CD1r/CD1s; anti-C3; anti-C5 (e.g., Eculizumab); peptidic C3 inhibitors of the compstatin family (e.g., Cp40); human soluble membrane (s/m) proteins (e.g., s/mCR1 (CD35), s/mCR2 (CD21), s/mCD55, s/mCD59); Human Factor H and derivatives and cobra venom factors and derivatives with complement inhibitory activity.
- protein Antagonists of complement factors C1, C2, C3, C4, C5, MBL
- VCP Vaccinia virus complement control protein
- Cell vehicles can be transfected with a DNA plasmid that expresses both the CAS9 protein a guide RNA (gRNA) specific for the gene of interest.
- gRNA guide RNA
- the gRNA-CAS9-mediated cut in the genome can be repaired using a donor DNA plasmid, which causes specific deletion of the targeted gene and permanent and total loss of the gene-encoded protein. Loss of protein expression can be validated using PCR (DNA level), Northern Blot/FISH (RNA level), or any Protein assay such as, for example western blot or flow cytometry.
- This method can be used to insert the gene of interest into a specific location of the cell vehicle genome.
- Cell vehicles can be transfected with a DNA plasmid that expresses both the CAS9 protein a guide RNA (gRNA) specific for the specific insertion location.
- gRNA guide RNA
- the gRNA-CAS9-mediated cut in the genome can be repaired using a donor DNA plasmid, which has the inserted gene of interest flanked by sequences of the cell vehicle genome on both sides of the location of the DNA cut/double stranded break, causing homologous recombination-mediated insertion of the gene of interest in the specific genome location rather than randomly.
- Successful insertion and protein expression can be validated using PCR (DNA level), Northern Blot/FISH (RNA level), or any Protein assay such as, for example, western blot or flow cytometry.
- shRNA/microRNA targeting the specific gene/protein of interest can be designed and cloned into a retroviral/lentiviral/transposon vector for stable integration into the cell vehicle genome.
- Cell vehicles can be transduced with the vector and successfully transduced cells can be selected using the vector encoded selection markers.
- shRNA-mediated suppression of the gene of interested can be evaluated using, e.g., Northern Blot and Protein assays.
- the specific gene/protein of interest can be designed and/or cloned into a retroviral or lentiviral vector for stable random integration into the cell vehicle genome.
- Cell vehicles can be transduced with the viral vector and successfully transduced cells can be selected using the vector encoded selection markers.
- shRNA-mediated suppression of the gene of interested will be evaluated using Northern Blot and any Protein assays, such as western blot, flow cytometry, etc.
- the specific gene/protein of interest can be designed and/or cloned into a mammalian transposon vector system such as the PiggyBac (SBI System Biosciences) or equivalent.
- Cell vehicles can be co-transfected with the transposon vector with the gene (cDNA) of interest flanked by the inverted terminal repeat (ITR) sequences and the Transposase vector.
- the Transposase enzyme can mediate transfer of a gene of interest into TTAA chromosomal integration sites.
- Successfully transduced cells optionally can be selected using vector encoded selection markers.
- Successful insertion and protein expression can be validated using PCR (DNA level), Northern Blot/FISH (RNA level), or any Protein assay such as, for example western blot or flow cytometry.
- siRNA/MicroRNA can be transfected into the cell vehicles by any of the established methodologies known in the art, e.g.: calcium chloride transfection; lipofection; Xfect; electroporation; sonoporation and cell squeezing (e.g., to introduce siRNA).
- Transient gene expression can be achieved, e.g., by cloning the gene of interest into an appropriate mammalian plasmid expression vector that can be transfected into cell vehicles with plasmid DNA encoding the desired product.
- mRNA encoding the gene/protein of interest can be transfected directly into the cell vehicles. Transfection can be performed using any of the established methodologies, e.g.: calcium chloride transfection; lipofection; Xfect; electroporation; sonoporation and cell squeezing (e.g., to introduce siRNA).
- Type I and Type II interferons are potent inducers of the anti-viral state in stem cells as well as in some tumor cells, which can interfere with the ability of these cells to get infected and support virus amplification. Therefore, in some embodiments, the cell vehicles provided herein and used in the methods provided herein are loaded with or engineered to express one or more inhibitors of interferon signaling that blocks the detection of viral infection and/or initiation of an anti-viral state/immune response.
- Ruxolitinib an interferon signaling small molecule inhibitor of Jak1/Jak2
- Jak1/Jak2 can successfully be used as to augment the therapeutic potential of various stem as well as tumor cells to function as carriers of oncolytic viruses by sensitizing them (making them susceptible to) to virus infection, amplification and spread (see, e.g., Example 6).
- the cell vehicles provided herein and used in the methods provided herein are loaded with or engineered to express one or more complement blocking factors.
- complement blocking factors for example, compstatin, a peptidic inhibitor of complement C3 activation, or a neutralizing anti-human C3a/C3a (desArg)/C3 antibody can be used to increase virus payload in the carrier cells and also obtain enhanced virus amplification and spread in the target tumor (see, e.g., Example 7).
- stem cell carriers can successfully amplify and deliver oncolytic vaccinia virus against allogeneic barriers due to their ability to avoid allogeneic recognition and actively immunosuppress NK cells, T cells, gd ( ⁇ ) T cells and/or a population of “NKT” cells expressing both NK (NKp46) and T cell (CD3) markers.
- NK cells T cells
- gd ( ⁇ ) T cells T cells
- NKp46 gd ( ⁇ ) T cells
- CD3 markers a population of “NKT” cells expressing both NK (NKp46) and T cell (CD3) markers.
- the stem cell carriers sometimes are unable to avoid allogeneic recognition, which resulted in the mounting of fast and potent allogeneic immune responses against the carrier stem cells even in the absence of virus.
- the cell vehicles provided herein and used in the methods provided herein are loaded with inhibitory factors or engineered for suppression/elimination/blockade of allogeneic rejection determinants.
- Such allogeneic rejection determinants can include, but are not limited to, the highly polymorphic and patient-specific MHC Class I and Class II molecules recognized by CD8 and CD4 T cells, or a broad spectrum of less polymorphic determinants recognized by various innate or mixed innate/adaptive T cell subpopulations such as NKT, iNKT, ⁇ (gd) T cells, which include the MHC-like MICA and CD1a,b,c,d molecules as well as various other stress-related or stress-sensing molecules like butyrophilins and Annexin A2.
- a pan-HLA blocking antibody (anti-human HLA-A,B,C Antibody) (see Example 8) can be used to suppress allogeneic anti-carrier cell responses of various innate and adaptive immune cell populations, whose numbers can be identified, for example, by multi-parameter flow cytometry analysis using CD69 as an activation marker and a set of cell type specific markers as follows: ⁇ T cells (CD3 + , ⁇ TCR + ), iNKT/NKT Type 1 cells (CD3 + , Va24Ja18 + ), general NKT (CD3 + CD56 + cells; ⁇ and iNKT excluded), classical CD4 (CD3 + CD4 + ; ⁇ and iNKT excluded), classical CD8 T cells (CD3 + CD8 + ; ⁇ and
- transient or permanent blockade or elimination of allogeneic rejection determinants such as HLA (MHC Class I) and others can be used as an effective strategy to generate stem- or tumor cell-based carriers (cell vehicles) with enhanced immune evasive potential and the ability to more effectively deliver oncolytic viruses by blocking the induction of allogeneic immune responses and/or the secretion of effector cytokines such as IFN ⁇ that can induce an anti-viral state and block the delivery and spread of the virus payload.
- Immunologic responses and rejection of allogeneic and virus-infected stem or tumor carrier cells can be enhanced by engagement of various other non-MHC markers that typically are up-regulated on the surface of virally infected or transformed tumor cells and serve as immune co-stimulatory molecules.
- markers can compromise the ability of the carrier cells (e.g., tumor cells or stem cells infected with virus and used for delivery of the virus) to evade immunological rejection.
- NKG2D molecules recognize MHC Class I-related proteins, such as human MIC A and MIC B, that are known to function as co-stimulatory molecules involved in the recognition and rejection of virus-infected and transformed tumor cells.
- Example 9 demonstrates that activation of the NKG2D signaling pathway using, e.g., an NKG2D-specific antibody provides a potent co-stimulatory signal that enhances and contributes to immune recognition and activation of the cellular immune response. Therefore, in some embodiments of the cell vehicles provided herein and used in the methods provided herein, the cell vehicles are loaded with inhibitory factors or engineered for suppression/elimination/blockade of co-stimulatory signals of the NKG2D signaling pathway.
- the carrier cells can be engineered for transient or permanent suppression of expression of MIC A and/or MIC B, or can be loaded with or engineered for the transient or permanent expression of: Kaposi's sarcoma-associated herpesvirus (KSHV) protein K5 (aka kK5 or MIR2), which targets the degradation of MICA/MICB, UL16 (HCMV), which binds MICB and prevents expression of the ligand on the cell surface (causes intracellular retention of MICB), HCMV US18 and US20, which target MICA for lysosomal degradation (US20 also downregulates MICA and MICB), HCMV UL142, which downregulates MICA by retention at the cis-golgi apparatus, Human Herpesvirus-7 (HHV-7) U21 protein, which suppresses cell surface expression of MICA and MICB, EBV protein LMP2A, which leads to downregulation of MICA, Adenovirus E3/19K protein, which prevents cell surface
- the cell vehicles are loaded with or engineered to transiently or permanently express an immunosuppressive molecule or cytokine, e.g., IL-10, to partially or completely reverse virus-mediated loss of immunosuppressive properties and improve the ability of virus infected carrier cells to avoid allogeneic responses and/or early immune recognition (see, e.g., Example 10).
- an immunosuppressive molecule or cytokine e.g., IL-10
- the carrier cells/cell vehicles modified to evade immune recognition and/or suppress anti-viral and/or allogeneic immune responses can be obtained by pretreating/loading the carrier cells with the immune response modifying agent of interest (e.g., Ruxolitinib, peptidic inhibitor of C3 activation, IL-10, inhibitors of MIC A/MIC B, etc.) or by transient or permanent modification of the carrier cells for expression/suppression of expression of the immune response modifying agent of interest, using methods known to those of skill in the art and described herein.
- the immune response modifying agent of interest e.g., Ruxolitinib, peptidic inhibitor of C3 activation, IL-10, inhibitors of MIC A/MIC B, etc.
- the load/expression can be local and/or transient, being present to the extent needed to facilitate infection by the virus, amplification of the virus, delivery of the virus to a tumor or other cancerous cells, and spread of the virus within the tumor or other cancer.
- the modification is by transient expression using a plasmid or other vector as known to those of skill in the art.
- the plasmid is engineered so that expression of the exogenous gene that is expressed is under the control of a viral promoter (e.g., immediate-early, early, intermediate, late promoters of a number of viruses such as adenovirus, vaccinia virus, CMV, RSV long terminal repeat promoter, adenoviral E1A promoter, and the like), thereby reducing or eliminating shutdown of exogenous gene expression by the virus that is subsequently loaded into the carrier cell.
- a viral promoter e.g., immediate-early, early, intermediate, late promoters of a number of viruses such as adenovirus, vaccinia virus, CMV, RSV long terminal repeat promoter, adenoviral E1A promoter, and the like
- the modified carrier cells can be loaded with virus as described herein and administered parenterally, systemically, intratumorally or other routes as provided herein.
- the carrier cell should evade immune recognition and/or suppress viral or allogeneic cellular immune responses long enough to deliver the virus to the target tumor/cancer site and facilitate its amplification and spread.
- the carrier cell should evade immune recognition and/or suppress viral or allogeneic cellular immune responses long enough to penetrate deep into the tumor.
- the time for delivery can be anywhere from several hours, e.g., between 10-20 hours, such as 10, 15, 16, 17, 18, 19 or 20 hours to several days, e.g., 24 hours, 30 hours, 36 hours, 40 hours, 48 hours, to 3, 4, 5 or more days, depending on the carrier cell/virus composition.
- sustained immunosuppression is not desirable once the viral delivery and spread at the target delivery site (e.g., tumor) has been achieved because it can prevent tumor-specific immune responses (directed against the tumor) from taking effect.
- the carrier cells/viruses provided herein can be administered to a subject, including a subject having a tumor or having neoplastic cells, for therapy.
- An administered carrier cell and virus can be a carrier cell and virus provided herein or any other carrier cell and virus generated using the methods provided herein.
- the carrier cells are autologous cells (i.e., derived from the patient) or allogeneic cells (i.e., not derived from the patient) that are stem cells, immune cells, or cancer cells.
- the carrier cells can be sensitized, for example, to enhance virus amplification ability, to block induction of the anti-viral state, to protect against allogeneic inactivation/rejection determinants, and to protect against complement, or the carrier cells can be engineered, for example, to be unresponsive to an interferon-induced antiviral state, to evade allogeneic recognition by T cells, including ⁇ T cells, NK cells and NKT cells, to express immunosuppressive factors of human or viral origin, to express cancer- or stem cell-derived factors sensitizing poorly permissive tumor cells to oncolytic virus infection, and to express factors interfering with the function of complement and neutralizing antibodies.
- the virus administered is a virus containing a characteristic such as attenuated pathogenicity, low toxicity, preferential accumulation in tumor, ability to activate an immune response against tumor cells, high immunogenicity, replication competence and ability to express exogenous proteins, and combinations thereof.
- Carrier cells can be irradiated prior to, or following, infection with oncolytic virus.
- uninfected cells In order to use transformed cells as cell carriers for oncolytic virotherapy, uninfected cells must be prevented from establishing new metastatic growth following administration. This can be accomplished by ⁇ -irradiation of carrier cells before or after viral infection, prior to administration, which ablates tumorigenicity, but preserves metabolic activity and does not affect viral production/amplification and release.
- carrier cells can be irradiated up to 24 hours before viral infection, or up to 24 hours after viral infection.
- the amount of radiation can be selected by one skilled in the art according to any of a variety of factors, including the nature of the carrier cell and virus.
- the radiation amount can be sufficient to inactivate the carrier cells and prevent tumorigenesis without affecting viral infection, amplification and release.
- the amount of radiation can be about 5 Gy, 10 Gy, 15 Gy, 20 Gy, 25 Gy, 30 Gy, 35 Gy, 40 Gy, 45 Gy 50 Gy, 100 Gy, 120 Gy, 150 Gy, 200 Gy, 250 Gy, 500 Gy or more.
- the carrier cell/virus combination can be delivered or administered to a subject locally or systemically.
- modes of administration include, but are not limited to, systemic, parenteral, intravenous, intraperitoneal, subcutaneous, intramuscular, transdermal, intradermal, intra-arterial (e.g., hepatic artery infusion), intravesicular perfusion, intrapleural, intraarticular, topical, intratumoral, intralesional, endoscopic, multipuncture (e.g., as used with smallpox vaccines), by inhalation, percutaneous, subcutaneous, intranasal, intratracheal, oral, intracavity (e.g., administering to the bladder via a catheter, administering to the gut by suppository or enema), vaginal, rectal, intracranial, intraprostatic, intravitreal, aural, ocular or topical administration.
- One skilled in the art can select any mode of administration compatible with the subject and the carrier cell/virus combination, and that also is likely to result in the carrier cell/virus reaching and entering the target cell-type or tissue, e.g., tumors and/or metastases.
- the route of administration can be selected by one skilled in the art according to any of a variety of factors, including the nature of the disease, the properties of the target cell or tissue (e.g., the kind of tumor), and the particular cell vehicle/virus to be administered.
- Administration to the target site can be performed, for example, by ballistic delivery, as a colloidal dispersion system, or systemic administration can be performed by injection into an artery.
- any of a variety of devices known in the art for administering medications, pharmaceutical compositions and vaccines can be used for administering the carrier cell/virus combinations.
- Exemplary devices include, but are not limited to, a hypodermic needle, an intravenous needle, a catheter, a needle-less injection device, an inhaler and a liquid dispenser, such as an eyedropper.
- a hypodermic needle an intravenous needle
- a catheter a needle-less injection device
- an inhaler such as an eyedropper
- a liquid dispenser such as an eyedropper.
- the Qaudra-FuseTM multi-pronged injection needle Rex Medical, Conshohocken, Pa.
- the device for administering a carrier cell/virus combination will be compatible with the carrier cell/virus combination; for example, a needle-less injection device such as a high-pressure injection device can be used with carrier cells/viruses not damaged by high-pressure injection, but is typically not used with carrier cells/viruses damaged by high-pressure injection.
- devices for administering an additional agent or compound to a subject Any of a variety of devices known in the art for administering medications to a subject can be used. Exemplary devices include, but are not limited to, a hypodermic needle, an intravenous needle, a catheter, a needle-less injection device, an inhaler and a liquid dispenser, such as an eyedropper.
- the device for administering the compound will be compatible with the desired method of administration of the compound. For example, a compound to be delivered systemically or subcutaneously can be administered with a hypodermic needle and syringe.
- the dosage regimen can be any of a variety of methods and amounts, and can be determined by one skilled in the art according to known clinical factors. As is known in the medical arts, dosages for any one patient can depend on many factors, including the subject's species, size, body surface area, age, sex, immunocompetence, and general health, the particular cell carrier and virus to be administered, duration and route of administration, the kind and stage of the disease, for example, tumor size, and other treatments or compounds, such as chemotherapeutic drugs, being administered concurrently. In addition to the above factors, such levels can be affected by the infectivity and amplification potential of the virus, and the nature of the carrier cell and/or virus, as can be determined by one skilled in the art.
- appropriate minimum dosage levels and dosage regimes of cell carriers and viruses can be levels sufficient for the carrier cells to deliver virus to the target site and for the virus to survive, grow and replicate in a tumor or metastasis.
- 100,000 to 1 billion unmodified, sensitized, protected or genetically engineered allogeneic or autologous carrier cells are infected ex vivo with any suitable oncolytic virus, including an oncolytic virus chosen based on the co-culture screen and analysis methods provided herein, at a multiplicity of infection (MOI) of 0.1 and higher.
- MOI multiplicity of infection
- cell carriers that produce a pfu/cell of at least or at least about 10, at least or at least about 100, at least or at least about 1,000 or higher are selected.
- the virus is administered in an amount that is at least or about or 1 ⁇ 10 5 pfu at least one time over a cycle of administration.
- Exemplary minimum levels for administering a virus to a 65 kg human can include at least about 1 ⁇ 10 5 plaque forming units (pfu), at least about 5 ⁇ 10 5 pfu, at least about 1 ⁇ 10 6 pfu, at least about 5 ⁇ 10 6 pfu, at least about 1 ⁇ 10 7 pfu, at least about 1 ⁇ 10 8 pfu, at least about 1 ⁇ 10 9 pfu, or at least about 1 ⁇ 10 10 pfu.
- plaque forming units pfu
- the virus is administered in an amount that is at least or about or is 1 ⁇ 10 5 pfu, 1 ⁇ 10 6 pfu, 1 ⁇ 10 7 pfu, 1 ⁇ 10 8 pfu, 1 ⁇ 10 9 pfu, 1 ⁇ 10 10 pfu, 1 ⁇ 10 11 pfu, 1 ⁇ 10 12 pfu, 1 ⁇ 10 13 pfu, or 1 ⁇ 10 14 pfu at least one time over a cycle of administration.
- the amount of carrier cell and virus can be administered as a single administration or multiple times over the cycle of administration.
- the methods provided herein can include a single administration of a cell carrier/virus combination to a subject or multiple administrations of a cell carrier/virus combination to a subject.
- a single administration is sufficient to deliver and establish a virus in a tumor, where the virus can proliferate and can cause or enhance an anti-tumor response in the subject; such methods do not require additional administrations of a carrier cell/virus combination in order to cause or enhance an anti-tumor response in a subject, which can result, for example in inhibition of tumor growth, inhibition of metastasis growth or formation, reduction in tumor size, elimination of a tumor or metastasis, inhibition or prevention of recurrence of a neoplastic disease or new tumor formation, or other cancer therapeutic effects.
- a cell carrier/virus combination can be administered on different occasions, separated in time typically by at least one day.
- a carrier cell/virus combination can be administered two times, three time, four times, five times, or six times or more, with one day or more, two days or more, one week or more, or one month or more time between administrations.
- Separate administrations can increase the likelihood of delivering a virus to a tumor or metastasis, where a previous administration has been ineffective in delivering a virus to a tumor or metastasis.
- Separate administrations can increase the locations on a tumor or metastasis where virus proliferation can occur or can otherwise increase the titer of virus accumulated in the tumor, which can increase the scale of release of antigens or other compounds from the tumor in eliciting or enhancing a host's anti-tumor immune response, and also can, optionally, increase the level of virus-based tumor lysis or tumor cell death.
- Separate administrations of a virus can further extend a subject's immune response against viral antigens, which can extend the host's immune response to tumors or metastases in which viruses have accumulated, and can increase the likelihood of a host mounting an anti-tumor immune response.
- each administration can be a dosage amount that is the same or different relative to other administration dosage amounts.
- all administration dosage amounts are the same.
- a first dosage amount can be a larger dosage amount than one or more subsequent dosage amounts, for example, at least 10 ⁇ larger, at least 100 ⁇ larger, or at least 1000 ⁇ larger than subsequent dosage amounts.
- all subsequent dosage amounts can be the same, or smaller amount relative to the first administration.
- Separate administrations can include any number of two or more administrations, including two, three, four, five or six administrations.
- One skilled in the art can readily determine the number of administrations to perform or the desirability of performing one or more additional administrations according to methods known in the art for monitoring therapeutic methods and other monitoring methods provided herein. Accordingly, the methods provided herein include methods of providing to the subject one or more administrations of a carrier cell/virus combination, where the number of administrations can be determined by monitoring the subject, and, based on the results of the monitoring, determining whether or not to provide one or more additional administrations.
- Deciding on whether or not to provide one or more additional administrations can be based on a variety of monitoring results, including, but not limited to, indication of tumor growth or inhibition of tumor growth, appearance of new metastases or inhibition of metastasis, the subject's anti-virus antibody titer, the subject's anti-tumor antibody titer, the overall health of the subject, the weight of the subject, the presence of virus solely in tumor and/or metastases, and the presence of virus in normal tissues or organs.
- the time period between administrations can be any of a variety of time periods.
- the time period between administrations can be a function of any of a variety of factors, including monitoring steps, as described in relation to the number of administrations, the time period for a subject to mount an immune response, the time period for a subject to clear the virus from normal tissue, or the time period for virus proliferation in the tumor or metastasis.
- the time period can be a function of the time period for a subject to mount an immune response; for example, the time period can be more than the time period for a subject to mount an immune response, such as more than about one week, more than about ten days, more than about two weeks, or more than about a month; in another example, the time period can be less than the time period for a subject to mount an immune response, such as less than about one week, less than about ten days, less than about two weeks, or less than about a month.
- the time period can be a function of the time period for a subject to clear the virus from normal tissue; for example, the time period can be more than the time period for a subject to clear the virus from normal tissue, such as more than about a day, more than about two days, more than about three days, more than about five days, or more than about a week.
- the time period can be a function of the time period for virus proliferation in the tumor or metastasis; for example, the time period can be more than the amount of time for a detectable signal to arise in a tumor or metastasis after administration of a virus expressing a detectable marker, such as about 3 days, about 5 days, about a week, about ten days, about two weeks, or about a month.
- an amount of carrier cell/virus combination is administered two times, three times, four times, five times, six times or seven times over a cycle of administration.
- the amount of virus can be administered on the first day of the cycle, the first and second day of the cycle, each of the first three consecutive days of the cycle, each of the first four consecutive days of the cycle, each of the first five consecutive days of the cycle, each of the first six consecutive days of the cycle, or each of the first seven consecutive days of the cycle.
- the cycle of administration is 7 days, 14 days, 21 days or 28 days.
- the cycle of administration is repeated over the course of several months or years.
- appropriate maximum dosage levels or dosage regimens of carrier cells/viruses are levels that are not toxic to the host, levels that do not cause splenomegaly of 3 times or more, levels that do not result in viral colonies or plaques in normal tissues or organs after about 1 day or after about 3 days or after about 7 days.
- the condition is associated with immunoprivileged cells or tissues.
- a disease or condition associated with immunoprivileged cells or tissues includes, for example, proliferative disorders or conditions, including the treatment (such as inhibition) of cancerous cells, neoplasms, tumors, metastases, cancer stem cells, and other immunoprivileged cells or tissues, such as wounds and wounded or inflamed tissues.
- combinations provided herein are administered by intravenous administration for systemic delivery.
- the combinations provided herein are administered by intratumoral injection.
- the subject has cancer.
- any of the cell vehicles provided herein can be used to provide virotherapy to subjects in need thereof including, sensitized cell vehicles, protected cell vehicles, engineered cell vehicles and matched cell vehicles which can include sensitized/engineered cell vehicles that additionally are screened by the matching assay provided herein.
- the subject in addition to being treated with the combination of the cell vehicle and the virus, additionally is treated with a separate composition containing a protected cell vehicle, e.g., pretreated with IFN ⁇ , to provide extended survival and/or local immunosuppression.
- a separate composition containing the protected cell vehicle can be administered concurrently with the cell vehicle/virus combination or can be administered between 10 hours to 3 or more days prior to or after administering the combination.
- the protected cell vehicle is administered 24 hours prior to, or 24 hours after, administering the combination.
- compositions can be administered by a single injection, by multiple injections, or continuously.
- the compositions can be administered by slow infusion including using an intravenous pump, syringe pump, intravenous drip or slow injection.
- continuous administration of the compositions can occur over the course of minutes to hours, such as between or about between 1 minute to 1 hour, such as between 20 and 60 minutes.
- Cancers amenable to the treatment and detection methods described herein also include cancers that metastasize. It is understood by those in the art that metastasis is the spread of cells from a primary tumor to a noncontiguous site, usually via the bloodstream or lymphatics, which results in the establishment of a secondary tumor growth.
- cancers contemplated for treatment include, but are not limited to melanoma, including choroidal and cutaneous melanoma; bladder, non-small cell lung, small cell lung, lung, head, neck, breast, pancreatic, gum, tongue, prostate, renal, bone, testicular, ovarian, cervical, gastrointestinal lymphoma, brain, or colon cancer; hepatocarcinoma; retinoblastoma; mesothelioma; astrocytoma; glioblastoma; neuroblastoma; and any other tumors or neoplasms that are metastasized or at risk of metastasis.
- melanoma including choroidal and cutaneous melanoma
- bladder non-small cell lung, small cell lung, lung, head, neck, breast, pancreatic, gum, tongue, prostate, renal, bone, testicular, ovarian, cervical, gastrointestinal lymphoma, brain, or colon cancer
- hepatocarcinoma retino
- the subject of the methods provided herein can be any subject, such as an animal or plant subject, including mammal or avian species.
- the animal subject can be a human or non-human animal including, but not limited to, domesticated and farm animals, such as a pig, cow, a goat, sheep, horse, cat, or dog.
- the animal subject is a human subject.
- the methods provided herein can further include one or more steps of monitoring the subject, monitoring the tumor, and/or monitoring the virus administered to the subject. Any of a variety of monitoring steps can be included in the methods provided herein, including, but not limited to, monitoring tumor size, monitoring anti-(tumor antigen) antibody titer, monitoring the presence and/or size of metastases, monitoring the subject's lymph nodes, monitoring the subject's weight or other health indicators including blood or urine markers, monitoring anti-(viral antigen) antibody titer, monitoring viral expression of a detectable gene product, and directly monitoring viral titer in a tumor, tissue or organ of a subject.
- the purpose of the monitoring can be for assessing the health state of the subject or the progress of therapeutic treatment of the subject, or can be for determining whether or not further administration of the same or a different virus is warranted, or for determining when or whether or not to administer a compound to the subject where the compound can act to increase the efficacy of the therapeutic method, or the compound can act to decrease the pathogenicity of the virus administered to the subject.
- Tumor and or metastasis size can be monitored by any of a variety of methods known in the art, including external assessment methods or tomographic or magnetic imaging methods, such as the detection methods described herein.
- methods provided herein for example, monitoring gene expression (e.g., viral gene expression), can be used for monitoring tumor and/or metastasis size.
- Monitoring size over several time points can provide information regarding the efficacy of the therapeutic methods provided herein.
- monitoring the increase or decrease in size of a tumor or metastasis can also provide information regarding the presence (i.e., detection and/or diagnosis) of additional tumors and/or metastases in the subject.
- Monitoring tumor size over several time points can provide information regarding the development of a neoplastic disease in a subject, including the efficacy of treatments of a neoplastic disease in a subject, such as the treatments provided herein.
- the methods provided herein also can include monitoring the antibody titer in a subject, including antibodies produced in response to administration of a cell vehicle delivering a virus to a subject.
- the viruses administered in the methods provided herein can elicit an immune response to endogenous viral antigens.
- the viruses administered in the methods provided herein also can elicit an immune response to exogenous genes expressed by a virus.
- the viruses administered in the methods provided herein also can elicit an immune response to tumor antigens.
- Monitoring antibody titer against viral antigens, viral expressed exogenous gene products, or tumor antigens can be used in methods of monitoring the toxicity of a virus, monitoring the efficacy of treatment methods, or monitoring the level of gene product or antibodies for production and/or harvesting.
- monitoring antibody titer can be used to monitor the toxicity of a virus.
- Antibody titer against a virus can vary over the time period after administration of the virus to the subject, where at some particular time points, a low anti-(viral antigen) antibody titer can indicate a higher toxicity, while at other time points a high anti-(viral antigen) antibody titer can indicate a higher toxicity.
- the viruses used in the methods provided herein can be immunogenic, and can therefore elicit an immune response soon after administering the virus to the subject.
- a virus against which a subject's immune system can quickly mount a strong immune response can be a virus that has low toxicity when the subject's immune system can remove the virus from all normal organs or tissues.
- a high antibody titer against viral antigens soon after administering the virus to a subject can indicate low toxicity of a virus.
- a virus that is not highly immunogenic can infect a host organism without eliciting a strong immune response, which can result in a higher toxicity of the virus to the host.
- a high antibody titer against viral antigens soon after administering the virus to a subject can indicate low toxicity of a virus.
- monitoring antibody titer can be used to monitor the efficacy of treatment methods.
- antibody titer such as anti-(tumor antigen) antibody titer
- Therapeutic methods provided herein can include causing or enhancing an immune response against a tumor and/or metastasis.
- monitoring the anti-(tumor antigen) antibody titer it is possible to monitor the efficacy of a therapeutic method in causing or enhancing an immune response against a tumor and/or metastasis.
- the therapeutic methods provided herein also can include administering to a subject a cell vehicle containing a virus that can accumulate in a tumor and can cause or enhance an anti-virus or anti-cell vehicle immune response. Accordingly, it is possible to monitor the ability of a host to mount an immune response against viruses or cell vehicles accumulated in a tumor or metastasis, which can indicate that a subject has also mounted an anti-tumor immune response, or can indicate that a subject is likely to mount an anti-tumor immune response, or can indicate that a subject is capable of mounting an anti-tumor immune response.
- the methods provided herein also can include methods of monitoring the health of a subject. Some of the methods provided herein are therapeutic methods, including neoplastic disease therapeutic methods. Monitoring the health of a subject can be used to determine the efficacy of the therapeutic method, as is known in the art.
- the methods provided herein also can include a step of administering to a subject a combination of a cell vehicle as provided herein, and a virus. Monitoring the health of a subject can be used to determine the pathogenicity of a virus in the combination, when administered to a subject. Any of a variety of health diagnostic methods for monitoring disease such as neoplastic disease, infectious disease, or immune-related disease can be monitored, as is known in the art.
- the weight, blood pressure, pulse, breathing, color, temperature or other observable state of a subject can indicate the health of a subject.
- the presence or absence or level of one or more components in a sample from a subject can indicate the health of a subject.
- Typical samples can include blood and urine samples, where the presence or absence or level of one or more components can be determined by performing, for example, a blood panel or a urine panel diagnostic test.
- Exemplary components indicative of a subject's health include, but are not limited to, white blood cell count, hematocrit, or reactive protein concentration.
- compositions can include a matched carrier cell identified by the methods provided herein and a pharmaceutical carrier.
- the matched carrier cells can include sensitized cells, engineered cells or primed cells (e.g., “protected” carrier cells pre-treated with IFN ⁇ ), prepared by any of the methods provided herein.
- Pharmaceutical compositions can include an oncolytic virus provided herein and a pharmaceutical carrier.
- Combinations can include, for example, a carrier cell and an oncolytic virus; a matched carrier cell and an oncolytic virus; a sensitized carrier cell and an oncolytic virus; an engineered carrier cell and an oncolytic virus; any carrier cell, including sensitized and engineered cells, an oncolytic virus and a primed (protected) carrier cell; an oncolytic virus, a primed (protected) carrier cell and an unprotected carrier cell that is matched or modified as provided herein.
- Combinations can include any of the carrier cells provided herein, an oncolytic virus and a detectable compound; any carrier cell, an oncolytic virus and a therapeutic compound; any carrier cell, an oncolytic virus and a viral expression modulating compound, or any combination thereof.
- Kits can include one or more pharmaceutical compositions or combinations provided herein, and one or more components, such as instructions for use, a device for administering the pharmaceutical composition or combination to a subject, a device for administering a therapeutic or diagnostic compound to a subject or a device for detecting a virus in a subject.
- a carrier cell contained in a pharmaceutical composition, combination or kit can include any carrier cell provided herein.
- An oncolytic virus contained in a pharmaceutical composition, combination or kit can include any virus provided herein.
- compositions containing a carrier cell, a primed (protected) carrier cell, a sensitized carrier cell, an engineered carrier cell, an oncolytic virus, or any carrier cell and oncolytic virus provided herein, and a suitable pharmaceutical carrier.
- a pharmaceutically acceptable carrier includes a solid, semi-solid or liquid material that acts as a vehicle carrier or medium for the virus.
- Pharmaceutical compositions provided herein can be formulated in various forms, for example in solid, semi-solid, aqueous, liquid, powder or lyophilized form.
- compositions containing any carrier cell (including primed, sensitized, engineered cells) or an oncolytic virus provided herein include, but are not limited to, sterile injectable solutions, sterile packaged powders, eye drops, tablets, pills, powders, lozenges, sachets, cachets, elixirs, suspensions, emulsions, solutions, syrups, aerosols (as a solid or in a liquid medium), ointments, soft and hard gelatin capsules, and suppositories.
- Suitable pharmaceutical carriers include, but are not limited to, water, buffers, saline solutions, phosphate buffered saline solutions, various types of wetting agents, sterile solutions, alcohols, gum arabic, vegetable oils, benzyl alcohols, gelatin, glycerin, carbohydrates, such as lactose, sucrose, dextrose, amylose or starch, sorbitol, mannitol, magnesium stearate, talc, silicic acid, viscous paraffin, perfume oil, fatty acid monoglycerides and diglycerides, pentaerythritol fatty acid esters, hydroxy methylcellulose, and powders, among others.
- compositions provided herein can contain other additives including, for example, antioxidants, preserving agents, analgesic agents, binders, disintegrants, coloring, diluents, excipients, extenders, glidants, solubilizers, stabilizers, tonicity agents, vehicles, viscosity agents, flavoring agents, sweetening agents, emulsions, such as oil/water emulsions, emulsifying and suspending agents, such as acacia, agar, alginic acid, sodium alginate, bentonite, carbomer, carrageenan, carboxymethylcellulose, cellulose, cholesterol, gelatin, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, methylcellulose, octoxynol 9, oleyl alcohol, povidone, propylene glycol monostearate, sodium lauryl sulfate, sorbitan esters, stearyl alcohol, tragacanth,
- Such carriers and/or additives can be formulated by conventional methods and can be administered to the subject at a suitable dose.
- Stabilizing agents such as lipids, nuclease inhibitors, polymers, and chelating agents can preserve the compositions from degradation within the body.
- Other suitable formulations for use in a pharmaceutical composition can be found, for example, in Remington: The Science and Practice of Pharmacy (2005, Twenty-first edition, Gennaro & Gennaro, eds., Lippencott Williams and Wilkins).
- compositions that include a carrier cell and/or oncolytic virus provided herein for injection or mucosal delivery typically include aqueous solutions of the virus provided in a suitable buffer for injection or mucosal administration or lyophilized forms of the virus for reconstitution in a suitable buffer for injection or mucosal administration.
- Such formulations optionally can contain one or more pharmaceutically acceptable carriers and/or additives as described herein or known in the art.
- Liquid compositions for oral administration generally include aqueous solutions, suitably flavored syrups, aqueous or oil suspensions, and flavored emulsions with edible oils such as corn oil, cottonseed oil, sesame oil, coconut oil, or peanut oil, as well as elixirs and similar pharmaceutical vehicles.
- compositions provided herein can be formulated to provide quick, sustained or delayed released of a carrier cell and/or virus as described herein by employing procedures known in the art.
- a carrier cell and/or virus provided herein is mixed with a pharmaceutical carrier to form a solid composition.
- tablets or pills are coated or otherwise compounded to provide a dosage form affording the advantage of prolonged action in the subject.
- a tablet or pill contains an inner dosage and an outer dosage component, the latter being in the form of an envelope over the former.
- the two components can be separated by an enteric layer, for example, which serves to resist disintegration in the stomach and permit the inner component to pass intact into the duodenum or to be delayed in release.
- enteric layers or coatings including, for example, a number of polymeric acids and mixtures of polymeric acids with such materials as shellac, cetyl alcohol, and cellulose acetate.
- compositions for inhalation or insufflation include solutions and suspensions in pharmaceutically acceptable, aqueous or organic solvents, or mixtures thereof, and powders. These liquid or solid compositions optionally can contain suitable pharmaceutically acceptable excipients and/or additives as described herein or known in the art. Such compositions are administered, for example, by the oral or nasal respiratory route for local or systemic effect.
- Compositions in pharmaceutically acceptable solvents are nebulized by use of inert gases. Nebulized solutions are inhaled, for example, directly from the nebulizing device, from an attached face mask tent, or from an intermittent positive pressure breathing machine. Solution, suspension, or powder compositions are administered, orally or nasally, for example, from devices which deliver the formulation in an appropriate manner such as, for example, use of an inhaler.
- compositions provided herein can be formulated for transdermal delivery via a transdermal delivery devices (“patches”). Such transdermal patches are used to provide continuous or discontinuous infusion of a virus provided herein.
- the construction and use of transdermal patches for the delivery of pharmaceutical agents are performed according to methods known in the art (see, for example, U.S. Pat. No. 5,023,252).
- patches are constructed for continuous, pulsatile, or on-demand delivery of a carrier cell and/or virus provided herein.
- Colloidal dispersion systems that can be used for delivery of viruses include macromolecule complexes, nanocapsules, microspheres, beads and lipid-based systems including oil-in-water emulsions (mixed), micelles, liposomes and lipoplexes.
- An exemplary colloidal system is a liposome.
- Organ-specific or cell-specific liposomes can be used in order to achieve delivery only to the desired tissue.
- the targeting of liposomes can be carried out by the person skilled in the art by applying commonly known methods.
- This targeting includes passive targeting (utilizing the natural tendency of the liposomes to distribute to cells of the reticuloendothelial system (RES) in organs which contain sinusoidal capillaries) or active targeting (for example, by coupling the liposome to a specific ligand, for example, an antibody, a receptor, sugar, glycolipid and protein, by methods known to those of skill in the art).
- a specific ligand for example, an antibody, a receptor, sugar, glycolipid and protein, by methods known to those of skill in the art.
- Monoclonal antibodies can be used to target liposomes to specific tissues, for example, tumor tissues, via specific cell-surface ligands.
- a carrier cell and an oncolytic virus e.g., a sensitized carrier cell and an oncolytic virus; an engineered carrier cell and an oncolytic virus; or any carrier cell, including sensitized and engineered cells, an oncolytic virus and a primed (protected) carrier cell (e.g., a carrier cell pretreated with IFN ⁇ ), which combination optionally can include an unprotected carrier cell that is matched or modified according to the methods provided herein.
- a combination can include a third or fourth agent, such as a second virus or other therapeutic or diagnostic agent.
- a combination can include a virus provided herein with one or more additional viruses, including, for example, one or more additional diagnostic or therapeutic viruses.
- a combination can contain pharmaceutical compositions containing a virus provided herein; or a carrier cell (including sensitized and engineered cells) and a virus; or a carrier cell (including sensitized and engineered cells), a virus and a primed cell, as described herein.
- a combination also can include any reagent for effecting treatment or diagnosis in accord with the methods provided herein such as, for example, an antiviral or chemotherapeutic agent.
- Combinations also can contain a compound used for the modulation of gene expression from endogenous or heterologous genes encoded by the virus.
- Combinations provided herein can contain a carrier cell, virus and a therapeutic compound.
- Therapeutic compounds for the compositions provided herein can be, for example, an anti-cancer or chemotherapeutic compound.
- Exemplary therapeutic compounds include, for example, cytokines, growth factors, photosensitizing agents, radionuclides, toxins, siRNA molecules, enzyme/pro E drug pairs, anti-metabolites, signaling modulators, anti-cancer antibiotics, anti-cancer antibodies, angiogenesis inhibitors, chemotherapeutic compounds, antimetastatic compounds or a combination of any thereof.
- Carrier cells and viruses provided herein can be combined with an anti-cancer compound, such as a platinum coordination complex.
- exemplary platinum coordination complexes include, for example, cisplatin, carboplatin, oxaliplatin, DWA2114R, NK121, IS3 295, and 254-S.
- chemotherapeutic agents also include, but are not limited to, methotrexate, vincristine, adriamycin, non-sugar containing chloroethylnitrosoureas, 5-fluorouracil, mitomycin C, bleomycin, doxorubicin, dacarbazine, taxol, fragyline, Meglamine GLA, valrubicin, carmustine, polifeprosan, MM1270, BAY 12-9566, RAS farnesyl transferase inhibitor, farnesyl transferase inhibitor, MMP, MTA/LY231514, lometrexol/LY264618, Glamolec, CI-994, TNP-470, Hycamtin/topotecan, PKC412, Valspodar/PSC833, Novantrone/mitoxantrone, Metaret/suramin, BB-94/batimastat, E7070, BCH-4556, CS-682,
- exemplary therapeutic compounds for use in pharmaceutical compositions and combinations provided herein can be found elsewhere herein (see e.g., Section H for exemplary cytokines, growth factors, photosensitizing agents, radionuclides, toxins, siRNA molecules, enzyme/pro-drug pairs, anti-metabolites, signaling modulators, anti-cancer antibiotics, anti-cancer antibodies, angiogenesis inhibitors, and chemotherapeutic compounds).
- the combination can include additional therapeutic compounds such as, for example, compounds that are substrates for enzymes encoded and expressed by the virus, or other therapeutic compounds provided herein or known in the art to act in concert with a virus.
- the virus can express an enzyme that converts a prodrug into an active chemotherapy drug for killing the cancer cell.
- combinations provided herein can contain a therapeutic compound, such as a prodrug.
- An exemplary virus/therapeutic compound combination can include a virus encoding Herpes simplex virus thymidine kinase with the prodrug ganciclovir.
- Additional exemplary enzyme/pro-drug pairs for the use in combinations provided include, but are not limited to, varicella zoster thymidine kinase/ganciclovir, cytosine deaminase/5-fluorouracil, purine nucleoside phosphorylase/6-methylpurine deoxyriboside, beta lactamase/cephalosporin-doxorubicin, carboxypeptidase G2/4-[(2-chloroethyl)(2-mesyloxyethyl)amino]benzoyl-L-glutamic acid, cytochrome P450/acetaminophen, horseradish peroxidase/indole-3-acetic acid, nitroreductase/CB1954, rabbit carboxylesterase/7-ethyl-10-[4-(1-piperidino)-1-piperidino]carbonyloxycamptothecin (CPT-11), mushroom tyrosinase/bis
- the combination can include compounds that can kill or inhibit viral growth or toxicity. Such compounds can be used to alleviate one or more adverse side effects that can result from viral infection (see, e.g., U.S. Patent Pub. No. US 2009-016228-A1). Combinations provided herein can contain antibiotic, antifungal, anti-parasitic or antiviral compounds for treatment of infections. In some examples, the antiviral compound is a chemotherapeutic agent that inhibits viral growth or toxicity.
- antibiotics which can be included in a combination with a carrier cell and virus provided herein include, but are not limited to, ceftazidime, cefepime, imipenem, aminoglycoside, vancomycin and antipseudomonal ⁇ -lactam.
- antifungal agents which can be included in a combination with a carrier cell and virus provided herein include, but are not limited to, amphotericin B, dapsone, fluconazole, flucytosine, griseofulvin, itraconazole, ketoconazole, miconazole, clotrimazole, nystatin, and combinations thereof.
- antiviral agents which can be included in a combination with a carrier cell and virus provided herein include, but are not limited to, cidofovir, alkoxyalkyl esters of cidofovir (CDV), cyclic CDV, and (S)-9-(3-hydroxy-2 phosphonylmethoxypropyl)adenine, 5-(dimethoxymethyl)-2′-deoxyuridine, isatin-beta-thiosemicarbazone, N-methanocarbathymidine, brivudine, 7-deazaneplanocin A, ST-246, Gleevec, 2′-beta-fluoro-2′,3′-dideoxyadenosine, indinavir, nelfinavir, ritonavir, nevirapine, AZT, ddI, ddC, and combinations thereof.
- combinations with an antiviral agent contain an antiviral agent known to be effective against the virus of the combination.
- combinations can contain a vaccinia virus with an antiviral compound, such as cidofovir, alkoxyalkyl esters of cidofovir, ganciclovir, acyclovir, ST-246, Gleevec, and derivatives thereof.
- the combination can include a detectable compound.
- a detectable compound can include, for example, a ligand, substrate or other compound that can interact with and/or bind specifically to a protein or RNA encoded and expressed by the virus or carrier cell, and can provide a detectable signal, such as a signal detectable by tomographic, spectroscopic, magnetic resonance, or other known techniques.
- the protein or RNA is an exogenous protein or RNA.
- the protein or RNA expressed by the virus or carrier cell modifies the detectable compound where the modified compound emits a detectable signal.
- Exemplary detectable compounds can be, or can contain, an imaging agent such as a magnetic resonance, ultrasound or tomographic imaging agent, including a radionuclide.
- the detectable compound can include any of a variety of compounds as provided elsewhere herein or are otherwise known in the art.
- Exemplary proteins that can be expressed by the virus or carrier cell and a detectable compound combinations employed for detection include, but are not limited to luciferase and luciferin, ⁇ -galactosidase and (4,7,10-tri(acetic acid)-1-(2- ⁇ -galactopyranosylethoxy)-1,4,7,10-tetraazacyclododecane) gadolinium (Egad), and other combinations known in the art.
- the combination can include a gene expression modulating compound that regulates expression of one or more genes encoded by the virus or carrier cell.
- a gene expression modulating compound that regulates expression of one or more genes encoded by the virus or carrier cell.
- Compounds that modulate gene expression are known in the art, and include, but are not limited to, transcriptional activators, inducers, transcriptional suppressors, RNA polymerase inhibitors and RNA binding compounds such as siRNA or ribozymes. Any of a variety of gene expression modulating compounds known in the art can be included in the combinations provided herein.
- the gene expression modulating compound included with a virus in the combinations provided herein will be a compound that can bind, inhibit or react with one or more compounds, active in gene expression such as a transcription factor or RNA of the virus or carrier cell of the combination.
- An exemplary virus or carrier cell/expression modulator combination can be a virus or carrier cell encoding a chimeric transcription factor complex having a mutant human progesterone receptor fused to a yeast GAL4 DNA-binding domain an activation domain of the herpes simplex virus protein VP16 and also containing a synthetic promoter containing a series of GAL4 recognition sequences upstream of the adenovirus major late E1B TATA box, where the compound can be RU486 (see, e.g., Yu et al. (2002) Mol Genet Genomics 268:169-178).
- a variety of other virus or carrier cell/expression modulator combinations known in the art also can be included in the combinations provided herein.
- the combination can contain nanoparticles.
- Nanoparticles can be designed such that they carry one or more therapeutic agents provided herein. Additionally, nanoparticles can be designed to carry a molecule that targets the nanoparticle to the tumor cells. In one non-limiting example, nanoparticles can be coated with a radionuclide and, optionally, an antibody immunoreactive with a tumor-associated antigen.
- the combination can contain one or more additional therapeutic and/or diagnostic viruses or other therapeutic and/or diagnostic microorganism (e.g., therapeutic and/or diagnostic bacteria) for diagnosis or treatment.
- additional therapeutic and/or diagnostic viruses are known in the art and include, but are not limited to, therapeutic and/or diagnostic poxviruses, herpesviruses, adenoviruses, adeno-associated viruses, and reoviruses.
- Exemplary oncolytic viruses are described herein above.
- kits can optionally include one or more components such as instructions for use, devices and additional reagents, and components, such as tubes, containers and syringes for practice of the methods.
- Exemplary kits can include a carrier cell and a virus provided herein, or a protected carrier cell, an unprotected carrier cell and a virus; and can optionally include instructions for use, a device for detecting a carrier cell and/or virus in a subject, a device for administering the carrier cell and virus to a subject, or a device for administering an additional agent or compound to a subject.
- a kit can contain instructions. Instructions typically include a tangible expression describing the carrier cell and virus and, optionally, other components included in the kit, and methods for administration, including methods for determining the proper state of the subject, the proper dosage amount, and the proper administration method, for administering the carrier cell and virus. Instructions also can include guidance for monitoring the subject over the duration of the treatment time.
- a kit can contain a device for detecting a carrier cell and/or virus in a subject.
- Devices for detecting a carrier cell and/or virus in a subject can include a low light imaging device for detecting light, for example, emitted from luciferase, or fluoresced from a fluorescent protein, such as a green or red fluorescent protein, a magnetic resonance measuring device such as an MRI or NMR device, a tomographic scanner, such as a PET, CT, CAT, SPECT or other related scanner, an ultrasound device, or other device that can be used to detect a protein expressed by the carrier cell and/or virus within the subject.
- a low light imaging device for detecting light, for example, emitted from luciferase, or fluoresced from a fluorescent protein, such as a green or red fluorescent protein
- a magnetic resonance measuring device such as an MRI or NMR device
- a tomographic scanner such as a PET, CT, CAT, SPECT or other related scanner
- the device of the kit will be able to detect one or more proteins expressed by the carrier cell and/or virus of the kit.
- any of a variety of kits containing carrier cells, viruses and detection devices can be included in the kits provided herein, for example, a carrier cell or virus expressing luciferase and a low light imager or a carrier cell or virus expressing a fluorescent protein, such as a green or red fluorescent protein, and a low light imager.
- Kits provided herein also can include a device for administering a carrier cell and virus to a subject.
- a device for administering a carrier cell and virus can be included in the kits provided herein.
- Exemplary devices include, but are not limited to, a hypodermic needle, an intravenous needle, a catheter, a needle-less injection device, an inhaler and a liquid dispenser, such as an eyedropper.
- a carrier cell and virus combination to be delivered systemically for example, by intravenous injection, can be included in a kit with a hypodermic needle and syringe.
- the device for administering a carrier cell and virus of the kit will be compatible with the carrier cell and virus of the kit; for example, a needle-less injection device such as a high pressure injection device can be included in kits with carrier cells and viruses not damaged by high pressure injection, but is typically not included in kits with carrier cells and viruses damaged by high pressure injection.
- a needle-less injection device such as a high pressure injection device can be included in kits with carrier cells and viruses not damaged by high pressure injection, but is typically not included in kits with carrier cells and viruses damaged by high pressure injection.
- Kits provided herein also can include a device for administering an additional agent or compound to a subject.
- a device for administering an additional agent or compound to a subject can be included in the kits provided herein.
- Exemplary devices include, but are not limited to, a hypodermic needle, an intravenous needle, a catheter, a needle-less injection device, an inhaler and a liquid dispenser, such as an eyedropper.
- the device for administering the compound of the kit will be compatible with the desired method of administration of the compound.
- a compound to be delivered systemically or subcutaneously can be included in a kit with a hypodermic needle and syringe.
- kits provided herein also can include any device for applying energy to a subject, such as electromagnetic energy.
- Such devices include, but are not limited to, a laser, light-emitting diodes, fluorescent lamps, dichroic lamps, and a light box. Kits also can include devices to effect internal exposure of energy to a subject, such as an endoscope or fiber optic catheter.
- Virotherapy using the combinations, compositions or kits provided herein containing an oncolytic virus and a cell vehicle as provided herein for delivery of the oncolytic virus to a subject in need of virotherapy can be used alone or in further combination with other therapies or treatments.
- the combinations or compositions provided herein can further be co-formulated or co-administered together with, prior to, intermittently with, or subsequent to, other therapeutic or pharmacologic agents or treatments, such as procedures.
- agents include, but are not limited to, other biologics, anti-cancer agents, small molecule compounds, dispersing agents, anesthetics, checkpoint inhibitors, vasoconstrictors, surgery, radiation, a chemotherapeutic agent, a biological agent, a polypeptide, an antibody, a peptide, a small molecule, a gene therapy vector, a virus and DNA and combinations thereof.
- agents also can include one or more agents to ameliorate, reduce or prevent side effects.
- the combination therapy can be used in combination with one or more cancer treatments that remove the primary tumor or that immunosuppress the subject prior to treatment.
- additional chemotherapy or radiation therapy can be used in addition to the combination therapy provided herein.
- Such additional therapy can have the effect of weakening a subject's immune system.
- surgical removal and/or immune-system weakening therapy may not be necessary.
- Exemplary other methods that can be combined therein include administering a compound that decreases the rate of proliferation of the tumor or neoplastic cells without weakening the immune system (e.g., by administering tumor suppressor compounds or by administering tumor cell-specific compounds) or administering an angiogenesis-inhibiting compound.
- a preparation of a second agent or agents or treatment or treatments can be administered at once, or can be divided into a number of smaller doses to be administered at intervals of time.
- Selected agent/treatment preparations can be administered in one or more doses over the course of a treatment time for example over several hours, days, weeks, or months. In some cases, continuous administration is useful. It is understood that the precise dosage and course of administration depends on the indication and patient's tolerability. Generally, dosing regimens for second agents/treatments herein are known to one of skill in the art.
- the combination therapy provided herein can be used in further combination with one or more of the following including, but not limited to, immune co-stimulation agonists, (e.g., B7 Family (CD28, ICOS); TNFR family (4-1BB, OX40, GITR, CD40, CD30, CD27); LIGHT, LT ⁇ ); BiTEs; CAR-T cells and TCR transgenic T cell targeting tumor-specific antigens; Checkpoint Inhibitors (Targets include PD-1, PD-2, PD-L1, PD-L2, CTLA-4, IDO 1 and 2, CTNNB1 ( ⁇ -catenin), SIRP ⁇ , VISTA, LIGHT, HVEM, LAG3, TIM3, TIGIT, Galectin-9, KIR, GITR, TIM1, TIM4, CEACAM1, CD27, CD40/CD40L, CD48, CD70, CD80, CD86, CD112, CD137 (4-1BB), CD155, CD160, CD200, CD226, CD244 (2
- Exemplary chemotherapeutic compounds and antibodies for administering in addition to the virotherapy provided herein can include Cytokines, Chemokines, Growth Factors, Photosensitizing Agents, Toxins, Anti-Cancer Antibiotics, Chemotherapeutic Compounds, Radionuclides, Angiogenesis Inhibitors, Signaling Modulators, Antimetabolites, Anti-cancer Vaccines, Anti-cancer Oligopeptides, Mitosis Inhibitor Proteins, Antimitotic Oligopeptides, Anti-cancer Antibodies, Anti-cancer Antibiotics and Immunotherapeutic Agents.
- anti-cancer agents that can be administered after, coincident with or before administration of the combination therapy herein, include, but are not limited to Acivicins; Avicin; Aclarubicins; Acodazoles; Acronines; Adozelesins; Aldesleukins; Alemtuzumabs; Alitretinoins (9-Cis-Retinoic Acids); Allopurinols; Altretamines; Alvocidibs; Ambazones; Ambomycins; Ametantrones; Amifostines; Aminoglutethimides; Amsacrines; Anastrozoles; Anaxirones; Ancitabines; Anthramycins; Apaziquones; Argimesnas; Arsenic Trioxides; Asparaginases; Asperlins; Atrimustines; Azacitidines; Azetepas; Azotomycins; Banoxantrones; Batabulins; Batim
- Aldesleukins e.g. PROLEUKIN®
- Alemtuzumabs e.g. CAMPATH®
- Alitretinoins e.g. PANRETIN®
- Allopurinols e.g. ZYLOPRIM®
- Altretamines e.g. HEXALEN®
- Amifostines e.g. ETHYOL®
- Anastrozoles e.g. ARIMIDEX®
- Arsenic Trioxides e.g. TRISENOX®
- Asparaginases e.g. ELSPAR®
- BCG Live e.g. TICE® BCG
- Bexarotenes e.g.
- TARGRETIN® Bevacizumab
- Bleomycins e.g. BLENOXANE®
- Busulfan intravenous e.g. BUSULFEX®
- Busulfan orals e.g. MYLERAN®
- Calusterones e.g. METHOSARB®
- Capecitabines e.g. XELODA®
- Carboplatins e.g. PARAPLATIN®
- Carmustines e.g. BCNU®, BiCNU®
- Carmustines with Polifeprosans e.g. GLIADEL® Wafer
- Celecoxibs e.g. CELEBREX®
- Chlorambucils e.g.
- Cisplatins e.g. PLATINOL®
- Cladribines e.g. LEUSTATIN®, 2-CdA®
- Cyclophosphamides e.g. CYTOXAN®, NEOSAR®
- Cytarabines e.g. CYTOSAR-U®
- Cytarabine liposomals e.g. DepoCyt®
- dacarbazines e.g. DTIC-Dome®
- Dactinomycins e.g. COSMEGEN®
- Darbepoetin Alfas e.g. ARANESP®
- Daunorubicin liposomals e. g.
- DANUOXOME® Daunorubicins/Daunomycins (e.g. CERUBIDINE®); Denileukin Diftitoxes (e.g. ONTAK®); Dexrazoxanes (e.g. ZINECARD®); Docetaxels (e.g. TAXOTERE®); Doxorubicins (e.g. ADRIAMYCIN®, RUBEX®); Doxorubicin liposomals, including Doxorubicin HCL liposome injections (e.g. DOXIL®); Dromostanolone propionates (e.g.
- DROMOSTANOLONE® and MASTERONE® Injection
- Elliott's B Solutions e.g. Elliott's B Solution®
- Epirubicins e.g. ELLENCE®
- Epoetin alfas e.g. EPOGEN®
- Estramustines e.g. EMCYT®
- Etoposide phosphates e.g. ETOPOPHOS®
- Etoposide VP-16s e.g. VEPESID®
- Exemestanes e.g. AROMASIN®
- Filgrastims e.g. NEUPOGEN®
- Floxuridines e.g. FUDR®
- Fludarabines e.g.
- FLUDARA® Fluorouracils incl. 5-FUs (e.g. ADRUCIL®); Fulvestrants (e.g. FASLODEX®); Gemcitabines (e.g. GEMZAR®); Gemtuzumabs/Ozogamicins (e.g. MYLOTARG®); Goserelin acetates (e.g. ZOLADEX®); Hydroxyureas (e.g. HYDREA®); Ibritumomabs/Tiuxetans (e.g. ZEVALIN®); Idarubicins (e.g. IDAMYCIN®); Ifosfamides (e.g.
- IFEX® Imatinib mesylates
- Interferon alfa-2as e.g. ROFERON-A®
- Interferon alfa-2bs e.g. INTRON A®
- Irinotecans e.g. CAMPTOSAR®
- Letrozoles e.g. FEMARA®
- Leucovorins e.g. WELLCOVORIN®, LEUCOVORIN®
- Levamisoles e.g. ERGAMISOL®
- Lomustines/CCNUs e.g. CeeBU®
- Mechlorethamines/Nitrogen mustards e.g.
- Megestrol acetates e.g. MEGACE®
- Melphalans/L-PAMs e.g. ALKERAN®
- Mercaptopurine including 6-mercaptopurines (6-MPs; e.g. PURINETHOL®); Mesnas (e.g. MESNEX®); Methotrexates; Methoxsalens (e.g. UVADEX®); Mitomycin Cs (e.g. MUTAMYCIN®, MITOZYTREX®); Mitotanes (e.g. LYSODREN®); Mitoxantrones (e.g. NOVANTRONE®); Nandrolone Phenpropionates (e.g.
- DURABOLIN-50® Nofetumomabs (e.g. VERLUMA®); Oprelvekins (e.g. NEUMEGA®); Oxaliplatins (e.g. ELOXATIN®); Paclitaxels (e.g. PAXENE®, TAXOL®); Pamidronates (e.g. AREDIA®); Pegademases (e.g. ADAGEN®); Pegaspargases (e.g. ONCASPAR®); Pegfilgrastims (e.g. NEULASTA®); Pentostatins (e.g. NIPENT®); Pipobromans (e.g.
- VERCYTE® Plicamycin/Mithramycins (e.g. MITHRACIN®); Porfimer sodiums (e.g. PHOTOFRIN®); Procarbazines (e.g. MATULANE®); Quinacrines (e.g. ATABRINE®); Rasburicases (e.g. ELITEK®); Rituximabs (e.g. RITUXAN®); Sargramostims (e.g. PROKINE®); Streptozocins (e.g. ZANOSAR®); Sunitinib Malates (e.g. SUTENT®); Talcs (e.g. SCLEROSOL®); Tamoxifens (e.g.
- NOLVADEX® Temozolomides
- Teniposides/VM-26s e.g. VUMON®
- Testolactones e.g. TESLAC®
- Thiotepas e.g. THIOPLEX®
- Topotecans e.g. HYCAMTIN®
- Toremifenes e.g. FARESTON®
- Tositumomabs e.g. BEXXAR®
- Trastuzumabs e.g. HERCEPTIN®
- Tretinoins/ATRA e.g.
- VESANOID® Uracil Mustards; Valrubicins (e.g. VALSTAR®); Vinblastines (e.g. VELBAN®); Vincristines (e.g. ONCOVIN®); Vinorelbines (e.g. NAVELBINE®); and Zoledronates (e.g. ZOMETA®).
- Valrubicins e.g. VALSTAR®
- Vinblastines e.g. VELBAN®
- Vincristines e.g. ONCOVIN®
- Vinorelbines e.g. NAVELBINE®
- Zoledronates e.g. ZOMETA®
- checkpoint inhibitors include, but are not limited to, anti-CTLA4 agents, anti-PD-1 agents and others, exemplary of which are the following:
- CTLA4 Inhibitory receptor Ipilimumab (MDX-CTLA-4; BMS-734016; MDX-010) Tremelimumab (ticilimumab; CP-675,206)
- PD-1 Inhibitory receptor MK-3475 (Pembrolizumab; Lambrolizumab; SCH 900475)
- AMP-224 anti-PD-1 fusion protein AMP-224)
- Nivolumab BMS-936558; MDX-1106; ONO-4538
- Pidilizumab (CT-011) PD-L1 Ligand for PD-1 MDX-1105 (RG7446) BMS-936559 MED 14736
- the additional treatments administered with the combinations for virotherapy provided herein can include one or more immunosuppressive drugs, for example, Glucocorticoids (e.g., prednisone, dexamethasone, hydrocortisone); Calcineurin Inhibitors (e.g., cyclosporin, tacrolimus); mTOR Inhibitors (e.g., sirolimus, everolimus); Methotrexate; Lenalidomide; Azathioprine; Mercaptopurine; Fluorouracil; Cyclophosphamide; TNF ⁇ blocking antibodies (e.g., infliximab/Remicade, etanercept/Enbrel, adalimumab/Humira) and Fludarabine.
- Glucocorticoids e.g., prednisone, dexamethasone, hydrocortisone
- Calcineurin Inhibitors e.g., cyclosporin, tacrolimus
- Tumors that can be treated by the methods disclosed herein include, but are not limited to a bladder tumor, breast tumor, prostate tumor, carcinoma, basal cell carcinoma, biliary tract cancer, bladder cancer, bone cancer, brain cancer, CNS cancer, glioma tumor, cervical cancer, choriocarcinoma, colon and rectum cancer, connective tissue cancer, cancer of the digestive system, endometrial cancer, esophageal cancer, eye cancer, cancer of the head and neck, gastric cancer, intra-epithelial neoplasm, kidney cancer, larynx cancer, leukemia, liver cancer, lung cancer, lymphoma, Hodgkin's lymphoma, Non-Hodgkin's lymphoma, melanoma, myeloma, neuroblastoma, oral cavity cancer, ovarian cancer, pancreatic cancer, retinoblastom
- the tumor is selected from metastatic melanoma; esophageal and gastric adenocarcinoma; cholangiocarcinoma (any stage); pancreatic adenocarcinoma (any stage); gallbladder cancer (any stage); high-grade mucinous appendix cancer (any stage); high-grade gastrointestinal neuroendocrine cancer (any stage); mesothelioma (any stage); soft tissue sarcoma; prostate cancer; renal cell carcinoma; lung small cell carcinoma; lung non-small cell carcinoma; head and neck squamous cell carcinoma; colorectal cancer; ovarian carcinoma; hepatocellular carcinoma; and glioblastoma.
- the tumor is selected from: glioblastoma, breast carcinoma, lung carcinoma, prostate carcinoma, colon carcinoma, ovarian carcinoma, neuroblastoma, central nervous system tumor, and melanoma.
- ADSCs Adipose-Derived Stem Cells
- stromal vascular fraction (SVF) containing the ADSCs is prepared in a closed system according to the following protocol:
- Non-cancer donor Stromal Vascular Fractions were obtained as part of an IRB-approved protocol after informed written consent (International Cell Surgical Society; IRB #ICSS-2016-024), as described above. Fresh SVFs were plated to attach overnight and were washed the next day to remove unattached cells and debris. Media was changed every 3-4 days until the mesenchymal stem cells (MSCs) started to grow and reached 80% confluency. Cells were expanded to 80% confluency and passaged every 3-4 days using TrypLETM Express (Life Technologies, (lx), no phenol red, Cat #12604021, 3 min, 37° C. incubator) for up to 10 passages.
- MSCs mesenchymal stem cells
- ADSCs Adipose-derived stem cells
- DMEM fetal calf serum
- RM20 adipose-derived stem cells at passage 0 were engineered to express eGFP (Clontech, Palo Alto, Calif.) under the control of a CMV promoter (UniProtKB—C5 MKY7 (C5 MKY7 HCMV)).
- a Lentiviral vector VectorBuilder available from VectorBuilder Inc., Santa Clara, Calif.
- eGFP was used to introduce eGFP into the ADSCs for constitutive expression.
- 10,000 eGFP-positive cells were sorted at passage 1 and subsequently at passage 2 using the BioRAD S3 Cell Sorter.
- eGFP expression was confirmed by flow cytometry and fluorescence microscopy using the Keyence All-in-one Fluorescence Microscope BZ-X700 Series.
- B16 F10 melanoma, A549 lung carcinoma and K562 cells were propagated in DMEM (B16, A549) (Gibco, Cat. #: 11960069) or RPMI 1640 (K562) (Gibco, Cat. #: 21870092), supplemented with 10% Fetal Bovine Serum (Omega Scientific, FB-02, USDA certified, heat inactivated), 2 mM L-Glutamine (ThermoFisher Scientific, 25030081, 100 ⁇ ) and Penicillin/Streptomycin (Life Technologies, 15140122, 100x).
- PBMCs Peripheral Blood Mononuclear Cells
- PBMCs were obtained as part of an IRB-approved protocol after informed written consent (International Cell Surgical Society; IRB #ICSS-2016-024). PBMCs were isolated using a standard Ficoll protocol (Ficoll-Paque Plus, GE Healthcare, cat. #95021-205). PBMCs were isolated from 8 donors and labeled BH62, RM20, RM47, RM48, RM52, RM53, SIBD01 and SIBD02.
- Co-cultures can include a patient's immune cells, such as PBMCs or whole blood, together with the cell-based delivery vehicle/carrier cells, including stem cells or tumor cells, and with or without the oncolytic virus to be tested, for example, vaccinia virus, herpes simplex virus and adenovirus, among others.
- a patient's immune cells such as PBMCs or whole blood
- the cell-based delivery vehicle/carrier cells including stem cells or tumor cells
- the oncolytic virus to be tested for example, vaccinia virus, herpes simplex virus and adenovirus, among others.
- the patient's PBMCs are co-cultured with different carrier cells, with or without oncolytic virus, to determine carrier cell compatibility.
- Co-cultures, including controls, to be tested include, for example: PBMCs alone +/ ⁇ virus; carrier cells alone +/ ⁇ virus; PBMCs + carrier cells +/ ⁇ virus; carrier cells alone + virus +/ ⁇ serum (10-50%) +/ ⁇ heat or pharmacological (cobra venom factor or equivalent) inactivation of complement (for a patient serum resistance screen); PBMCs+carrier cells +virus +/ ⁇ serum (10-50%) +/ ⁇ heat or pharmacological (cobra venom factor or equivalent) inactivation of complement (for a patient serum resistance screen); and heparinized whole blood instead of PBMCs as above (for a native environment test).
- the co-cultures are then analyzed to determine the levels of virus amplification and infection, as well as immunosuppressive/immunostimulatory effects, using various assays and tests, including, but not limited to: surface and intracellular multiparameter flow cytometry or equivalents like Cytometry by Time of Flight (CyTOF), for example; enzyme-linked immunosorbent assay (ELISA); enzyme-linked immunospot (ELISPOT) assay; virus plaque assays (VPAs); quantitative PCR (qPCR); bioluminescence assays; fluorescence microscopy; and intracellular staining.
- CyTOF Cytometry by Time of Flight
- ELISA enzyme-linked immunosorbent assay
- ELISPOT enzyme-linked immunospot
- VPAs virus plaque assays
- qPCR quantitative PCR
- Flow cytometry is performed, for example, using gating parameters to identify specific immune cell populations including T cells (such as, but not limited to, CD3, CD4, CD8), NK cells (such as, but not limited to, NKp46, CD16, CD56) and NKT cells (such as, but not limited to, CD3, CD16, CD56, NKp46, aGalCer-CD1d tetramers).
- T cells such as, but not limited to, CD3, CD4, CD8
- NK cells such as, but not limited to, NKp46, CD16, CD56
- NKT cells such as, but not limited to, CD3, CD16, CD56, NKp46, aGalCer-CD1d tetramers.
- Immune responses are evaluated by analyzing various activation/effector function parameters including, but not limited to: CD69, CD25, CD71, CD27 (CD70L), CD154 (CD40L), CD137 (4-1BB), CD44, CD45RA, CD45RO, CD278 (ICOS), CD127 (IL-7RA), CD183 (CXCR3), CD197 (CCR7), CD39, CD73, CD314 (NKG2D), PD-1, CTLA-4, IFN ⁇ / ⁇ , IFN ⁇ , TNF ⁇ , IL-2, IL-4, IL-5, IL-9, IL-10, IL-12, IL-13, IL-15, IL-18, IL-21, IL-22, IL-23, IL-25, GM-CSF, IL-17, IL-6, CD107a, CD107b, TGF ⁇ , Perforin, Granzyme B, IL-1a/IL-1b, G-CSF, RANTES, EXOTAXIN, MIP-1b, MCP-1, EGF, H
- PBMCs are co-cultured (100 ⁇ l) with ADSCs (50 ⁇ l) with or without vaccinia virus (50 ⁇ l) for 48 h on 96-well flat-bottom plates and in a total of 200 ⁇ l R10 medium (RPMI 1640 supplemented with 10% FBS, L-Glutamine and Pen/Strep).
- the virus (50 ⁇ l) and ADSCs (50 ⁇ l) are premixed and agitated on an orbital shaker at 37° C. (incubator) for 1 h, and then (100 ⁇ l of the mix) is added to the PBMCs without additional washing of any unbound virus.
- the cells are recovered for staining and flow cytometry analysis directly, or after an additional 4-5 hour stimulation with K562 cells or PMA/Ionomycin (50 ⁇ l) with Monensin/Brefeldin A (50 ⁇ l), as needed.
- ADSCs Adipose Derived Stem Cells
- PBMCs Peripheral Blood Mononuclear Cells
- carrier cells that amplify the virus are identified as candidates for delivery of the virus to a subject for virotherapy.
- This example evaluates the effect of immune cells derived from the subject on the ability of the carrier cell to facilitate viral amplification and infection.
- PBMCs are used for this purpose.
- Factors that affect virus infection and amplification by carrier cells include, for example, the presence or absence of interferons (IFNs) and/or the presence or absence of PBMCs, are evaluated using appropriate assays that measure the amount of virus present.
- IFNs interferons
- Such assays include, for example, virus plaque assays (VPAs), qPCR (or any alternative assays that measure the amount of viral DNA genomes present), ELISAs (to measure virus-encoded or engineered reporter proteins or enzymes, such as, but not limited to, ⁇ -galactosidase), and bioluminescence assays (to measure virus-encoded luminescent reporter proteins such as, but not limited to, luciferase).
- Viral infection of carrier cells, PBMCs and tumor cells can be monitored using, for example, flow cytometry and fluorescence microscopy.
- VPAs Virus Plaque Assays
- Co-cultures as described in Example 1 can be stored and subsequently analyzed using VPA to quantify virus particle amplification under different conditions and with different combinations of patient-derived immune cells and cell-based delivery vehicles.
- Virus-containing samples are stored at ⁇ 80° C. and subjected to a three-fold freeze ( ⁇ 80° C.)/thaw (+37° C.) cycle followed by sonication on ice-cold water for three 1 min intervals, one min apart. Sonicated samples are serially diluted in vaccinia virus infection medium (DMEM supplemented with 2% FBS, L-Glutamine and Penicillin/Streptomycin). Plaque assays are performed in 24-well plates in duplicate wells. 200,000 CV-1 monkey kidney cells are plated in 1 mL D10 medium per well, overnight. Supernatants are aspirated and 10-fold serial dilutions of the virus-containing sample are applied to the CV-1 monolayer at 200 ⁇ L/well.
- DMEM vaccinia virus infection medium
- Plaque assays are performed in 24-well plates in duplicate wells. 200,000 CV-1 monkey kidney cells are plated in 1 mL D10 medium per well, overnight. Supernatants are aspirated and 10-fold serial d
- CMC overlay medium is prepared by autoclaving 15 g carboxymethylcellulose sodium salt (Sigma-Aldrich, cat. #C4888) and re-suspending with overnight stirring at room temperature in 1 L DMEM, supplemented with Penicillin/Streptomycin, L-Glutamine, and 5% FBS, with short-term storage at 4° C.
- Virus infection is monitored using fluorescently labeled cells, such as eGFP-labeled ADSCs (Example 1), and fluorescently labeled oncolytic viruses, such as, for example, a TurboFP635-engineered L14 virus, which is a TK-inserted Turbo-FP635 engineered LIVP strain of vaccinia obtained from StemVac GmbH, Bernried, Germany.
- fluorescently labeled cells such as eGFP-labeled ADSCs (Example 1)
- fluorescently labeled oncolytic viruses such as, for example, a TurboFP635-engineered L14 virus, which is a TK-inserted Turbo-FP635 engineered LIVP strain of vaccinia obtained from StemVac GmbH, Bernried, Germany.
- Time course microscopic observations of virus infection are performed using fluorescence microscopy, on a Keyence All-in-one Fluorescence Microscope BZ-X700 Series.
- ADSCs engineered to express eGFP are followed on the GFP channel (1 second exposure
- ADSCs Adipose-Derived Stem Cells
- IFNs Interferons
- ADSCs The ability of ADSCs to amplify vaccinia virus and to respond to the protective anti-viral effects of interferons was evaluated using L14 vaccinia virus (VV) (TK-inserted Turbo-FP635 engineered LIVP strain).
- Vaccinia viruses L14 VV
- Vaccinia viruses L14 VV
- 50,000 RM35 ADSCs were infected in a 12-well plate with 10,000 pfu (plaque forming units) L14 VV, in the presence of increasing doses (0.08 ng/mL, 0.3 ng/mL, 1.3 ng/mL, 5 ng/mL and 20 ng/mL) of IFN ⁇ (Peprotech, cat.
- the stability of the IFN ⁇ -induced anti-viral state was then determined.
- 100,000 RM20-eGFP ADSCs (see, Example 1) were infected in a 12-well plate with 100,000 pfu L14 VV and incubated for up to 4 days.
- the ADSCs were either untreated (( ⁇ ) IFN ⁇ control), or pre-treated with 20 ng/mL of IFN ⁇ for 24 h.
- the IFN ⁇ was administered 1, 2, or 3 days prior to virus infection.
- Time course fluorescence image analysis was used to visualize the progression of virus infection, with images taken at 24 h, 48 h, 72 h and 96 h post infection.
- Fluorescence imaging of ADSCs infected with virus in the absence of IFN ⁇ show uninfected (eGFP+/green) ADSCs, infected dead ADSCs (TurboFP635/red), and infected live ADSCs (yellow), with an increasing number of infected and dead cells from 24-96 h, demonstrating successful infection of ADSCs with virus in the absence of interferons.
- Fluorescence imaging of ADSCs infected with virus after 24 h exposure to IFN ⁇ revealed no red or yellow cells, indicating that pretreatment with interferons prevents viral infection.
- IFN CTRL IFN ⁇ IFN ⁇ IFN ⁇ + IFN ⁇ CTRL 2.85 ⁇ 10 6 — — — 80 ng/ml — 1.90 ⁇ 10 3 5.10 ⁇ 10 3 5.25 ⁇ 10 3 20 ng/ml — 2.50 ⁇ 10 3 3.10 ⁇ 10 3 2.95 ⁇ 10 3 5 ng/ml — 2.30 ⁇ 10 3 3.15 ⁇ 10 3 2.55 ⁇ 10 3 1.3 ng/ml — 1.80 ⁇ 10 3 4.50 ⁇ 10 3 2.45 ⁇ 10 3 0.3 ng/ml — 2.75 ⁇ 10 3 4.95 ⁇ 10 4 2.45 ⁇ 10 3 0.08 ng/ml — 7.40 ⁇ 10 3 6.90 ⁇ 10 4 3.05 ⁇ 10 3 0.02 ng/ml — 4.55 ⁇ 10 5 7.00 ⁇ 10 5 3.15 ⁇ 10 5
- VV vaccinia virus
- ADSCs carrier cells
- 50,000 RM20-eGFP ADSCs were infected with 5,000 or 50,000 L14 VV alone, or in the presence of 1 ⁇ 10 6 allogeneic PBMCs (from the blood donor designated BH62) for up to 48 h.
- Overlay fluorescence imaging and a virus plaque assay were used to evaluate vaccinia virus infection and amplification, respectively, by comparing results from co-cultures of allogeneic ADSCs+PBMCs to ADSCs cultured alone and PBMCs cultured alone.
- ADSCs alone are permissive to VV infection and amplification, whereas PBMCs alone do not show VV infection or amplification.
- the co-cultures demonstrated that ADSCs can amplify vaccinia virus in the presence of allogeneic PBMCs and that, in the presence of the allogeneic PBMCs, the overall virus output was increased relative to the combined output of ADSCs and PBMCs when infected separately, indicating that the ADSCs sensitize PBMCs to vaccinia virus infection.
- the amplification and infection of oncolytic viruses in the presence of different tumor/cancer cell types is evaluated to determine whether a particular carrier cell and oncolytic virus combination is effective at tumor/cancer cell oncolysis.
- tumors can be identified as resistant or permissive to viral infection, and any enhancement of viral delivery to the tumor cells by the carrier cells can be evaluated.
- Other factors such as the role of IFN ⁇ pretreatment, carrier cell dose and secretion of soluble factors by carrier cells, also can be evaluated.
- This example evaluates the effects of an exemplary carrier cell type, ADSCs, on the ability to deliver an exemplary virus, vaccinia virus, to an exemplary cancer cell line, B16 melanoma cells.
- Fluorescence microscopy, plaque assay analysis and flow cytometry can be used to determine the effects of using ADSCs to enhance the delivery of vaccinia virus to tumor/cancer cells.
- the use of ADSCs to more effectively deliver virus to resistant B16 F10 melanoma cells was evaluated.
- A549 cells, which are highly permissive to virus infection, were included for comparison.
- Plaque assay analysis of vaccinia virus amplification was performed as described above on B16 cells alone, A549 lung carcinoma cells alone, B16+A549 co-cultures, ADSCs alone, and B16+ADSC co-cultures. The results are summarized in Table 5.
- the A549 lung carcinoma cells were used as a highly vaccinia virus permissive positive control and showed virus amplification levels similar to ADSCs alone.
- the viral titers recovered from the B16+A549 or B16+ADSC co-cultures exceeded the combined virus output from the individual cells infected in separation, showing that the highly permissive cancer cells and ADSCs can both sensitize the resistant melanoma cells to infection with vaccinia virus.
- IFN ⁇ pretreatment of ADSCs was tested. 200,000 RM20-eGFP cells (0.2 M) were pretreated with 20 ng/mL IFN ⁇ for 24 h, then co-cultured with 200,000 (0.2 M) RM20 ADSCs, A549 cells or B16 cells, and infected with L14 vaccinia virus as described above. Fluorescent images were captured after 24 h, 48 h and 72 h. The results showed that IFN ⁇ pretreatment protects ADSCs from virus infection only in the presence of relatively resistant B16 cells, but not in the presence of the highly permissive A549 cells. Due to the protection of ADSCs from the virus, IFN ⁇ pretreatment of the ADSCs compromised the oncolysis of the B16 monolayer, indicating that the observed antitumor potential primarily depends on amplification of the virus by the ADSCs.
- the effects of stem cell number/dose on the oncolysis of the B16 monolayer was evaluated. 1 ⁇ 10 6 B16 cells were co-cultured with either 200,000 (0.2 M) or 20,000 (0.02 M) RM20-eGFP ADSCs, and infected with L14 VV as described above, and fluorescent images were captured at 24 h, 48 h and 72 h. The results show that an insufficient number of ADSCs (2% or less) leads to incomplete oncolysis of the B16 monolayer, confirming that the observed antitumor potential depends on amplification of the virus by the ADSCs.
- WT1 (ACAM2000) is a wild type thymidine kinase (TK)-positive Wyeth strain of vaccinia virus with a higher amplification potential and greater ability to evade anti-viral immunity than L14 VV.
- the ADSC-mediated sensitization potential of resistant B16 cells to infection by L14 VV was compared to the sensitization potential of the cells to infection by WT1 VV.
- Supernatants from four ADSC donors (RM20, RM35, BH21 and RM58) were added to 10,000 B16 cells infected with either L14 VV or WT1 VV at an MOI of 0.1 for 96 h in 96-well flat-bottom plates.
- MTT a tetrazolium dye; 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- NAD P
- H-dependent cellular oxidoreductase enzymes can, under defined conditions, reflect the number of viable cells present. The assay assesses reduction of the tetrazolium dye MTT to a purple formazan dye.
- MTT ThermoFisher, cat.
- Results of the plaque analysis show an overall trend of increasing average pfu/sample in the presence of ADSC supernatants, indicating that the ADSC supernatants are able to sensitize B16 cells to L14 and to WT1 VV infection.
- the MTT assay results show the absence of a significant impact of ADSC supernatants alone on the survival of B16 cells infected with L14 or WT1 VV.
- Results showed slight increases in the frequency (percentage) of infected K562 cells (Table 9), TurboFP635+ MFI (Table 10), and viral titers (Table 11), but showed no significant effect on the overall survival of the highly resistant K562 cells, as measured by the MTT assay, demonstrating an ADSC supernatant-potentiated infection of K562 cells.
- ADSC supernatants alone can sensitize K562 cells to virus infection, but do not result in significant oncolysis.
- the effects of ADSCs were compared to those of the ADSC supernatants. 100,000 K562 cells were infected with L14 VV at an MOI of 0.1, but instead of ADSC supernatants, K562 cells were co-cultured with 5,000 or 20,000 RM20-eGFP ADSCs in triplicate. Fluorescence imaging and flow cytometry analysis show that the green fluorescent ADSCs attract the unlabeled/grey K562 cells and dramatically increase the percentage of infected K562 cells.
- ADSCs have the unique properties of both amplifying the virus (approx. 10,000-fold or 5,000 pfu/cell) and spreading it to tumor cells. This can be attributed to a higher local multiplicity of infection (MOI) as well as some form of chemo-attraction. This effect is at least in part due to the secretion of unidentified soluble factors present in the supernatants of ADSCs.
- MOI local multiplicity of infection
- an optimal oncolytic virus/cell-based delivery vehicle combination facilitates viral amplification and oncolysis in the subject to be treated, while preventing immune activation and suppressing virus-induced immune activation during delivery of the virus to tumors.
- the previous examples demonstrate how to evaluate carrier cells, such as ADSCs, for their viral amplification potential, their ability to sensitize tumor/cancer cells to infection by the virus, and their ability to facilitate oncolysis by the virus (e.g., by recruiting remote tumor/cancer cells).
- This example assesses subject-specific immune restrictions that can limit the therapeutic potential of off-the-shelf cell-based delivery vehicles for delivering oncolytic viruses to tumors/cancer cells.
- Such restrictions include, for example, virus-induced and/or allogeneic carrier cell-induced immune activation, such as, for example, IFN ⁇ and cytotoxic responses. These responses originate from the innate (NK, NKT) and adaptive (T) immune cells of improperly matched subjects/recipients.
- ADSCs carrier cells that generally meet the requirements of a good delivery vehicle for viral therapy when administered autologously or allogeneically, such as ADSCs (i.e., they promote viral amplification and demonstrate evasion and/or suppression of innate and/or adaptive immune responses to the virus and/or the carrier cell), nonetheless can sometimes be less efficient in certain allogeneic settings.
- carrier cells autologous or allogeneic
- oncolytic virus e.g., PBMCs, PBMCs+plasma/serum, or whole blood with or without red blood cell lysis
- subject-derived immune cells e.g., PBMCs, PBMCs+plasma/serum, or whole blood with or without red blood cell lysis
- the immune induction effects of oncolytic virus/allogeneic cell-based delivery vehicle combinations, and the parallel allogeneic/autologous cell-based carrier-induced immunosuppression, is evaluated using, e.g., Enzyme-Linked ImmunoSpot (ELISPOT) or flow cytometry analysis (or equivalents such as CyTOF, for example), based on a panel of markers identifying different immune cell populations, including T cells (such as, but not limited to, CD3, CD4, CD8), NK cells (such as, but not limited to, NKp46, CD16, CD56) and NKT cells (such as, but not limited to, CD3, CD16, CD56, NKp46, aGalCer-CD1d tetramers), as well as a panel of activation/effector function markers including, but not limited to: CD69, CD25, CD71, CD27 (CD70L), CD154 (CD40L), CD137 (4-1BB), CD44, CD45RA, CD45RO, CD278 (ICOS),
- PBMCs were co-cultured for 48 h with 10,000 or 100,000 autologous (RM20) or allogeneic (RM35) ADSCs.
- PBMCs were co-cultured (100 ⁇ L) with ADSCs (50 ⁇ L) for 48 h on 96-well flat-bottom plates and in a total of 200 ⁇ L R10 medium (RPMI 1640 supplemented with 10% FBS, L-Glutamine and Pen/Strep).
- the co-cultures were subjected to an additional 4 h stimulation of NK cells with 250,000 K562 cells or PMA/Ionomycin (50 ⁇ L) with Monensin/Brefeldin A (50 ⁇ L), as needed.
- NK and T cells were evaluated using flow cytometry analysis on PBMCs alone, PBMCs+10,000 or +100,000 autologous ADSCs, and PBMCs+10,000 or +100,000 allogeneic ADSCs.
- flow cytometry analysis co-cultures of PBMCs and ADSCs were recovered by pipetting and transferred to V-bottom plates, where they were washed with FACS Buffer (lx PBS with 1% FBS) and surface stained for 30 min at 4° C. in FACS Buffer supplemented with the following antibody cocktail: anti-human CD3-PerCP/Cy5.5 (BioLegend, cat.
- the FACS buffer also contained a viability probe (ThermoFisher Scientific, LIVE/DEAD Fixable Violet Dead Cell Stain Kit, for 405 nm excitation, cat. #L34964, at 1:1000). After staining, the cells were washed twice with FACS Buffer, fixed in 2% PFA in 1 ⁇ PBS for 15 min at RT, washed again with FACS Buffer to remove PFA and analyzed on BD FACSAria II.
- anti-human CD107a-AlexaFluor 488 BioLegend, cat. #328610 was added directly to the co-cultures at 1:20 (10 ⁇ l/well) 5 hours prior to recovery and surface staining, followed by the addition of Monensin at 1:1000 an hour later, for an additional 4 h incubation at 37° C. (BioLegend, cat. #420701-BL, 1000X).
- NK and T cells were determined in the autologous and allogeneic co-cultures and compared to a PBMC alone control. The results are summarized in Table 14 below. It was found that autologous and in allogeneic settings, ADSC-mediated immunosuppression does not affect the frequency of NK and T cells.
- Flow cytometry analysis of NK activation using CD69 upregulation on gated live CD3 ⁇ NKp46 + NK cells shows that CD69 was upregulated when PBMCs were co-cultured with autologous (RM20) or with allogeneic (RM35) ADSCs, following stimulation with K562 cells or PMA/Ionomycin.
- Flow cytometry analysis of NK cell cytotoxic functions using CD107a surface exposure show upregulation of CD107a in co-cultures of PBMCs with autologous and with allogeneic ADSCs.
- PBMC co-cultures with ADSCs demonstrate significant dose-dependent immunosuppressive effects against the immune response of NK cells that was stimulated by exposure to K562 target cells.
- the immunosuppressive effect was observed in autologous and in allogeneic settings, demonstrating that ADSCs can suppress NK cells in autologous and in allogeneic settings.
- allogeneic stem cells to overcome immune barriers correlates with their ability to suppress virus-induced T, NK and NKT-like cell responses.
- the ability of allogeneic ADSCs from the RM35 donor to specifically suppress virus-induced responses mediated by NK, T and NKT cells was tested in a new cohort of two PBMC donors, with to reveal possible patient-specific restrictions.
- PBMCs (100 ⁇ L) from two different blood donors (RM47 and RM48) were co-cultured with 400; 2,000; 10,000 or 60,000 allogeneic RM35 ADSCs (50 ⁇ L) for 48 h on 96 well flat-bottom plates, in a total of 200 ⁇ L R10 medium (RPMI 1640 supplemented with 10% FBS, L-Glutamine and Pen/Strep), in the presence or absence of 10,000 pfu (50 ⁇ L) of WT1 VV (ACAM2000).
- R10 medium RPMI 1640 supplemented with 10% FBS, L-Glutamine and Pen/Strep
- Flow cytometry analysis of gated live T, NK, and NKT-like cells was performed to determine the percentage of CD69 + activated cells from each immune cell type in PBMCs cultured alone (control), PBMCs cultured with WT1 VV (no ADSCs), PBMCs+allogeneic ADSC co-cultures without virus, and PBMC+allogeneic ADSC co-cultures with WT1 VV.
- NK cells were the major responding population, with the combination of virus and low doses of stem cells resulting in the activation of more than 80% of the NK cells.
- Lower doses of the stem cells were insufficient for immunosuppression and increased virus-induced immune responses, possibly reflecting significantly augmented virus amplification.
- Higher doses of ADSCs provided potent suppression of the weaker vaccinia virus-induced T cell responses in a dose-dependent fashion, indicating that stem cell-mediated immunosuppression overcomes the immune-stimulatory effect of augmented virus amplification.
- NKp46 + CD3 + NKT-like population of cells was identified that responded vigorously to virus infection, with upregulation of activation markers. This population of cells manifested the ability for rapid and selective expansion in response to vaccinia virus, consistent with the already established role of NKT cells in the control of viral infections.
- the immunosuppressive and virus amplification abilities of the allogeneic ADSCs derived from the RM20 donor were evaluated and tested in a larger cohort of PBMC donors to determine patient-specific restrictions.
- PBMCs from four different blood donors (SIBD01, SIBD02, RM52, RM53) were each co-cultured with 5,000; 10,000; 20,000; or 40,000 allogeneic RM20 ADSCs for 48 h, in the presence or absence of 5,000 pfu of WT1 VV.
- Flow cytometry analysis was performed as described above to determine the percentage of CD69 + activated NK, T and NKT cells.
- PBMCs cultured without stem cells were used as a control.
- a 4 h stimulation with 250,000 K562 cells at the end of the 48 h co-culture period was used to evaluate the extent of NK cell suppression by the allogeneic RM20 ADSCs, using NK cells from the SIBD01 and SIBD02 blood donors.
- PBMCs cultured alone were used as a control.
- Flow cytometry analysis was used to determine the percentage of CD69 + NK, T and NKT cells, and plaque analysis was used to quantify virus amplification by the allogeneic ADSCs in the presence of the resistant vs. permissive blood donor samples.
- Flow cytometry analysis (Table 20) revealed that the immunosuppressive properties of ADSCs fail in unfavorable allogeneic settings, where the stem cells lose their immune privileged status and activate NK and T cells directly, even in the absence of the virus.
- NK, T and NKT Cell Responses RM20 % CD69 + NK Cells % CD69 + T Cells % CD69 + NKT Cells ADSC Cell SIBD01 SIBD02 SIBD01 SIBD02 SIBD01 SIBD02 Number PBMCs PBMCs PBMCs PBMCs PBMCs PBMCs PBMCs No CTRL 5.65 3.37 2.38 1.10 7.23 26.45 virus 40k 57.05 5.88 10.41 3.14 33.90 36.00 20k 30.75 4.19 6.43 1.27 22.85 51.70 10k 15.85 4.70 4.70 1.00 13.55 40.85 5k 10.85 5.33 4.78 1.02 10.75 34.60 CTRL + 73.40 79.40 15.70 2.19 37.60 97.20 K562 40k + K562 82.80 60.10 13.25 2.03 33.40 53.40 20k + K562 64.80 49.00 9.36 1.35 21.95 69.00 10k + K562 70.65 46.35 9.73 1.38
- PBMC donors demonstrate variable responses to the allogeneic stem cells and the virus alone, or in combination. These subject-specific differences indicate that proper matching between the subject and the carrier cell can improve therapeutic efficacy.
- 20,000 eGFP-labelled RM20 ADSCs were co-cultured with 20,000 pfu L14 VV (MOI of 1) for up to 48 h in the presence of 250,000 PBMCs from the resistant (SIBD01; “resistant PBMCs”) or permissive (SIBD02; “permissive PBMCs”) blood donors.
- the ADSCs were infected with virus at the time of co-culture with the PBMCs, or were pre-infected for 1 h in a 37° C. incubator with constant shaking and then added to the PBMCs without washing away any unbound virus.
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