WO2017143449A1 - Smc combination therapy for the treatment of cancer - Google Patents
Smc combination therapy for the treatment of cancer Download PDFInfo
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- WO2017143449A1 WO2017143449A1 PCT/CA2017/050237 CA2017050237W WO2017143449A1 WO 2017143449 A1 WO2017143449 A1 WO 2017143449A1 CA 2017050237 W CA2017050237 W CA 2017050237W WO 2017143449 A1 WO2017143449 A1 WO 2017143449A1
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Definitions
- apoptosis or programmed cell death
- apoptosis or programmed cell death
- lAP Inhibitor of apoptosis (lAP) proteins, such as X-linked lAP (XIAP) or cellular lAP proteins 1 and 2 (clAP1 and 2)
- XIAP X-linked lAP
- clAP1 and 2 cellular lAP proteins 1 and 2
- lAPs apoptosis proteins
- Other forms of cell death could include, but are not limited to, necroptosis, necrosis, pyroptosis, and immunogenic cell death.
- these lAPs regulate various cell signaling pathways through their ubiquitin E3 ligase activity, which may or may not be related to cell survival.
- Smac polypeptide Smac
- Smac is a proapoptotic protein released from mitochondria in conjunction with cell death. Smac can bind to the lAPs, antagonizing their function.
- Smac mimetic compounds SMCs are non-endogenous proapoptotic compounds capable of carrying out one or more of the functions or activities of endogenous Smac.
- the prototypical XIAP protein directly inhibits key initiator and executioner caspase proteins within apoptosis cascades. XIAP can thereby thwart the completion of apoptotic programs.
- Cellular lAP proteins 1 and 2 are E3 ubiquitin ligases that regulate apoptotic signaling pathways engaged by immune cytokines. The dual loss of clAP1 and 2 can cause TN Fa, TRAIL, and/or IL-1 ⁇ to become toxic to, e.g., the majority of cancer cells.
- SMCs may inhibit XIAP, clAP1 , clAP2, or other lAPs, and/or contribute to other proapoptotic mechanisms.
- SMCs Treatment of cancer by the administration of SMCs has been proposed.
- SMCs alone may be insufficient to treat certain cancers.
- the present invention includes compositions and methods for the treatment of cancer by the administration of an SMC and an immunostimulatory, or immunomodulatory, agent.
- SMCs and agents are described herein, including, without limitation, the SMCs of Table 1 and the agents of Table 2, Table 3, and Table 4.
- One aspect of the present invention is a composition including an SMC from Table 1 , and one or more (e.g., two, three, four, five, or more) agents, wherein each agent is independently an immune checkpoint inhibitor (ICI) or is an agent from Table 2 or angent from Table 3 or is a STING agonist.
- the ICI is an ICI from Table 4, .
- the SMC and the agent(s) are provided in amounts that together are sufficient to treat cancer when administered to a patient in need thereof.
- the two, three, or four agents are from different categories (i.e., one agent is an ICI, one agent is from Table 2, one agent is from Table 3, and/or one agent is a STING agonist).
- Another aspect of the present invention is a method for treating a patient diagnosed with cancer, the method including administering to the patient an SMC from Table 1 and one or more (e.g., two, three, four, five, or more) agents, wherein each agent is independently an ICI or is an agent from Table 2 or angent from Table 3 or is a STING agonist.
- the ICI is an ICI from Table 4, such that the SMC and the agent are administered.
- the two, three, or four agents are from different categories (i.e., one agent is an ICI, one agent is from Table 2, one agent is from Table 3, and/or one agent is a STING agonist), simultaneously or within 28 days of each other in amounts that together are sufficient to treat the cancer.
- the SMC and the agent(s) are administered within 14 days of each other, within 10 days of each other, within 5 days of each other, within 24 hours of each other, within 6 hours of each other, or simultaneously.
- the SMC is a monovalent SMC, such as LCL161 , SM-122, GDC- 01 52/RG741 9, GDC-091 7/CUDC-427, or SM-406/AT-406/Debio1 143.
- the SMC is a bivalent SMC, such as AEG40826/HGS1 049, OICR720, TL3271 1 /Birinapant, SM-1387/APG-1387, or SM-1 64.
- one of the agents is a TLR agonist from Table 2.
- the agent is a lipopolysaccharide, peptidoglycan, or lipopeptide.
- the agent is a CpG oligodeoxynucleotide, such as CpG-ODN 221 6.
- the agent is imiquimod or poly(l :C).
- one of the agents is a virus from Table 3.
- the agent is a vesicular stomatitis virus (VSV), such as VSV-M51 R, VSV-MA51 , VSV-I FN , or VSV-I FN -NIS.
- VSV vesicular stomatitis virus
- the agent is an adenovirus, maraba vesiculovirus, reovirus, rhabdovirus, or vaccinia virus, or a variant thereof.
- the agent is a Talimogene laherparepvec, a variant herpes simplex virus.
- one of the agents is an ICI.
- the agent is Ipilimumab, Tremelimumab, Pembrolizumab, Nivolumab, Pidilizumab, AM P-224, AM P-51 4, AUN P 1 2, PDR001 , BGB-A31 7, REGN281 0, Avelumab, BMS-935559, Atezolizumab, Durvalumab, BMS-986016, LAG525, IMP321 , MBG453, Lirilumab, or MGA271 .
- a composition or method of the present invention includes a plurality of immunostimulatory or immunomodulatory agents, including but not limited to interferons, and/or a plurality of SMCs.
- a composition or method of the present invention includes one or more interferon agents, such as an interferon type 1 agent, an interferon type 2 agent, and/or an interferon type 3 agent.
- interferon agents such as an interferon type 1 agent, an interferon type 2 agent, and/or an interferon type 3 agent.
- the cancer can be a cancer that is refractory to treatment by an SMC in the absence of an immunostimulatory or immunomodulatory agent.
- the treatment can further include administration of a therapeutic agent including an interferon.
- the cancer can be a cancer that is selected from adrenal cancer, basal cell carcinoma, biliary tract cancer, bladder cancer, bone cancer, brain cancer, breast cancer, cervical cancer, choriocarcinoma, colon cancer, colorectal cancer, connective tissue cancer, cancer of the digestive system, endometrial cancer, epipharyngeal carcinoma, esophageal cancer, eye cancer, gallbladder cancer, gastric cancer, cancer of the head and neck, hepatocellular carcinoma, intraepithelial neoplasm, kidney cancer, laryngeal cancer, leukemia, liver cancer, liver metastases, lung cancer, lymphoma, melanoma, myeloma, multiple myeloma, neuroblastoma, mesothelioma, neuroglioma, myelodysplasia syndrome, multiple myeloma, oral cavity cancer, ovarian cancer, paediatric cancer, pancreatic cancer, pancreatic endocrine tumor
- the invention further includes a composition including an SMC from Table 1 and one or more (e.g., two, three, four, or more) agents described above.
- One of the agents may include a killed virus, an inactivated virus, or a viral vaccine, such that the SMC and the agent are provided in amounts that together are sufficient to treat cancer when administered to a patient in need thereof.
- the said agent is a NRRP or a rabies vaccine.
- the invention includes a composition including an SMC from Table 1 , a first agent that primes an immune response, and a second agent that boosts the immune response, such that the SMC and the agents are provided in amounts that together are sufficient to treat cancer when administered to a patient in need thereof.
- the first agent and the second agent is an oncolytic virus vaccine.
- the first agent is an adenovirus carrying a tumor antigen and the second agent is a vesiculovirus, such as a Maraba-MG1 carrying the same tumor antigen as the adenovirus or a Maraba-MG1 that does not carry a tumor antigen.
- Neighboring cell means a cell sufficiently proximal to a reference cell to directly or indirectly receive an immune, inflammatory, or proapoptotic signal from the reference cell.
- “Potentiating apoptosis or cell death” means to increase the likelihood that one or more cells will apoptose or die.
- a treatment may potentiate cell death by increasing the likelihood that one or more treated cells will apoptose, and/or by increasing the likelihood that one or more cells neighboring a treated cell will apoptose or die.
- Endogenous Smac activity means one or more biological functions of Smac that result in the potentiation of apoptosis, including at least the inhibition of clAP1 and clAP2. It is not required that the biological function occur or be possible in all cells under all conditions, only that Smac is capable of the biological function in some cells under certain naturally occurring in vivo conditions.
- Smac mimetic compound or “SMC” means a composition of one or more components, e.g., a small molecule, compound, polypeptide, protein, or any complex thereof, capable of inhibiting clAP1 and/or inhibiting clAP2.
- Smac mimetic compounds include the compounds listed in Table 1 .
- To “induce an apoptotic program” means to cause a change in the proteins or protein profiles of one or more cells such that the amount, availability, or activity of one or more proteins capable of participating in an lAP-mediated apoptotic pathway is increased, or such that one or more proteins capable of participating in an lAP-mediated apoptotic pathway are primed for participation in the activity of such a pathway. Inducing an apoptotic program does not require the initiation of cell death per se:
- induction of a program of apoptosis in a manner that does not result in cell death may synergize with treatment with an SMC that potentiates apoptosis, leading to cell death.
- Agent means a composition of one or more components cumulatively capable of inducing an apoptotic or inflammatory program in one or more cells of a subject, and cell death downstream of this program being inhibited by at least clAP1 and clAP2.
- An agent may be, e.g. , a TLR agonist (e.g., a compound listed in Table 2), a virus (e.g., a virus listed in Table 3), such as an oncolytic virus, or an immune checkpoint inhibitor (e.g., one listed in Table 4).
- TLR agonist e.g., a compound listed in Table 2
- virus e.g., a virus listed in Table 3
- an immune checkpoint inhibitor e.g., one listed in Table 4
- Treating cancer may completely or partially abolish some or all of the signs and symptoms of cancer in a subject, decrease the severity of one or more symptoms of cancer in a subject, lessen the progression of one or more symptoms of cancer in a subject, or mediate the progression or severity of one or more subsequently developed symptoms.
- Prodrug means a therapeutic agent that is prepared in an inactive form that may be converted to an active form within the body of a subject, e.g. within the cells of a subject, by the action of one or more enzymes, chemicals, or conditions present within the subject.
- low dosage or “low concentration” is meant at least 5% less (e.g., at least 1 0%, 20%, 50%,
- a “high dosage” is meant at least 5% (e.g., at least 1 0%, 20%, 50%, 100%, 200%, or even 300%) more than the highest standard recommended dosage of a particular compound for treatment of any human disease or condition.
- Immuno checkpoint inhibitor means a cancer treatment drug that prevents immune cells from being turned off by cancer cells by antagonistically blocking respective receptors or binding their ligands thus re-establishing the immune system's capacity to attack a tumor.
- FIG. 1 A is a pair of graphs showing the results of Alamar blue viability assays of cells treated with LCL1 61 and increasing MOIs of VSVA51 . Error bars, mean ⁇ s.d.
- FIG. 1 B is a set of micrographs of cells treated with LCL161 and 0.1 MOI of VSVA51 -GFP.
- FIG. 1 A is a pair of graphs showing the results of Alamar blue viability assays of cells treated with LCL1 61 and increasing MOIs of VSVA51 . Error bars, mean ⁇ s.d.
- FIG. 1 B is a set of micrographs of cells treated with LCL161 and 0.1 MOI of
- FIG. 1 C is a pair of graphs showing viability (Alamar Blue) of cells infected with VSVA51 (0.1 MOI) in the presence of increasing concentrations of LCL1 61 . Error bars, mean ⁇ s.d.
- FIG. 1 D is a pair of graphs showing data from cells that were infected with VSVA51 for 24 hours. Cell culture supernatant was exposed to virus-inactivating UV light and then media was applied to new cells for viability assays (Alamar Blue) in the presence of LCL1 61 . Error bars, mean ⁇ s.d.
- FIG. 1 E is a graph showing the viability of cells co-treated with LCL1 61 and non-spreading virus VSVA51 AG (0.1 MOI).
- FIG. 1 F is a graph and a pair of images relating to cells that were overlaid with agarose media containing LCL1 61 , inoculated with VSVA51 - GFP in the middle of the well, and infectivity measured by fluorescence and cytotoxicity was assessed by crystal violet staining (images were superimposed; non-superimposed images are in FIG. 1 1 ). Error bars, mean ⁇ s.d.
- FIGS. 2A-2E are a set of graphs and images showing that SMC treatment does not alter the cancer cell response to oncolytic virus (OV) infection. All panels of FIG. 2 are representative of data from at least three independent experiments using biological replicates.
- FIG. 2A is a pair of graphs showing data from cells that were pretreated with LCL1 61 and infected with the indicated MOI of VSVA51 . Virus titer was assessed by a standard plaque assay.
- FIG. 2E is a pair of images showing immunoblots for STAT1 pathway activation performed on cells that were pretreated with LCL161 and subsequently stimulated with I FN .
- FIG. 3A is a graph showing Alamar blue viability assay of cells transfected with combinations of nontargeting (NT), TNF-R1 and DR5 siRNA and subsequently treated with LCL1 61 and VSVA51 (0.1 MOI) or I FNp. Error bars, mean ⁇ s.d.
- FIG. 3B is a graph showing the viability of cells transfected with NT or I FNAR1 siRNA and subsequently treated with LCL1 61 and
- FIG. 3C is a graph showing data from an experiment in which cells were pretreated with LCL1 61 , infected with 0.5 MOI of VSVA51 , and cytokine gene expression was measured by RT-qPCR. Error bars, mean ⁇ s.d.
- FIG. 3D is a chart showing data collected from an experiment in which cytokine ELISAs were performed on cells transfected with NT or I FNAR1 siRNA and subsequently treated with LCL161 and 0.1 MOI of VSVA51 . Error bars, mean ⁇ s.d.
- FIG. 3C is a graph showing data from an experiment in which cells were pretreated with LCL1 61 , infected with 0.5 MOI of VSVA51 , and cytokine gene expression was measured by RT-qPCR. Error bars, mean ⁇ s.d.
- FIG. 3D is a chart showing data collected from an experiment in which cytokine ELISAs were performed on cells transf
- FIG. 3E is a graph showing the viability of cells co-treated with LCL161 and cytokines. Error bars, mean ⁇ s.d.
- FIG. 3F is a graph showing data from an experiment in which cells were pretreated with LCL1 61 , stimulated with 250 U/mL ( ⁇ 20 pg/mL) I FN and cytokine m RNA levels were determined by RT-qPCR. Error bars, mean ⁇ s.d.
- FIG. 3G is a pair of graphs showing the results of cytokine ELISAs conducted on cells treated with LCL1 61 and 0.1 MOI of VSVA51 .
- FIG. 3H is a graph showing the result of cytokine ELISAs performed on cells expressing ⁇ -DN and treated with LCL1 61 and VSVA51 or I FN . Error bars, mean ⁇ s.d.
- FIGS. 4A-4G are a set of graphs and images showing that combinatorial SMC and OV treatment is efficacious in vivo and is dependent on cytokine signaling.
- FIG. 4B is a series of representative I VIS images that were acquired from the experiment of FIG. 4A.
- FIGS. 4C and 4D are sets of immunofluorescence images of infection and apoptosis in 24 hour treated tumors using a- VSV or a-c-caspase-3 antibodies.
- FIG. 4E is an image showing an immunoblot in which protein lysates of tumors from the corresponding treated mice were immunoblotted with the indicated antibodies.
- FIG. 4B is a series of representative I VIS images that were acquired from the experiment of FIG. 4A.
- FIGS. 4C and 4D are sets of immunofluorescence images of infection and apoptosis in 24 hour treated tumors using a- VSV or a-c-caspase-3 antibodies.
- FIG. 4E is an image showing an immunoblot in which protein lysates of tumors from the corresponding treated mice were immunoblotted with the indicated antibodies.
- 4F is a pair of graphs showing data from an experiment in which mice bearing EMT6-Fluc tumors were injected with neutralizing TNFa or isotype matched antibodies, and subsequently treated with 50 mg/kg LCL1 61 (p.o.) and 5x1 0 8 PFU VSVA51 (i.v.).
- the left panel depicts tumor growth.
- the right panel represents the Kaplan-Meier curve depicting mouse survival. Error bars, mean ⁇ s.e.m.
- FIG. 4G is a set of representative I VIS images that were acquired from the experiment of FIG. 4F.
- FIGS. 5A-5E are a series of graphs and images showing that small molecule immune stimulators enhance SMC therapy in murine cancer models.
- 5B is a pair of graphs showing the results of an experiment in which established EMT6-Fluc tumors were treated with SMC (50 mg/kg LCL1 61 , p.o.) and poly(l :C) (1 5 ug i.t. or 2.5 mg/kg i.p.).
- the left panel depicts tumor growth.
- FIG. 5C is a series of representative I VIS images that were acquired from the experiment of FIG. 5B.
- FIG. 5D is a pair of graphs showing the results of an experiment in which EMT6-Fluc tumors were treated with LCL161 or combinations of 200 ⁇ g (i.t.) and/or 2.5 mg/kg (i.p.) CpG ODN 221 6.
- the left panel depicts tumor growth.
- the right panel represents the Kaplan-Meier curve depicting mouse survival.
- FIG. 5E is a series of representative I VIS images that were acquired from the experiment of FIG. 5D.
- FIG. 6 is a graph showing the responsiveness of a panel of cancer and normal cells to the combinatorial treatment of SMC and OV.
- FIG. 7 is pair of graphs showing that SMC and OV co-treatment is highly synergistic in cancer cells.
- the graphs show Alamar blue viability of cells treated with serial dilutions of a fixed ratio combination mixture of VSVA51 and LCL1 61 (PFU: ⁇ LCL1 61 ).
- Combination indexes (CI) were calculated using Calcusyn.
- FIG. 8 is a pair of graphs showing that monovalent and bivalent SMCs synergize with OVs to cause cancer cell death.
- FIGS. 9A and 9B are a set of images and graphs showing that SMC-mediated cancer cell death is potentiated by oncolytic viruses.
- FIG. 9A is a series of images showing the results of a virus spreading assay of cells that were overlaid with 0.7% agarose in the presence of vehicle or LCL1 61 and 500 PFU of the indicated viruses were dispensed in to the middle of the well. Cytotoxicity was assessed by crystal violet staining. Arrow denotes extension of the cell death zone from the origin of OV infection.
- FIGS. 10A and 10B are a set of graphs and images showing that clAP1 , clAP2 and XIAP cooperatively protect cancer cells from OV-induced cell death.
- FIG. 10A shows Alamar blue viability of cells transfected with nontargeting (NT) siRNA or siRNA targeting clAP1 , clAP2 or XIAP, and subsequently treated with LCL161 and 0.1 MOI VSVA51 for 48 hours. Error bars, mean ⁇ s.d.
- NT nontargeting
- FIG. 10B is a representative siRNA efficacy immunoblots for the experiment of FIG. 10A.
- FIG. 1 1 is a set of images used for superimposed images depicted in FIG. 1 G.
- Cells were overlaid with agarose media containing LCL161 , inoculated with VSVA51 -GFP in the middle of the well, and infectivity measured by fluorescence and cytotoxicity was denoted by crystal violet (CV) staining. Note: the bars represent the same size.
- FIGS. 12A and 12B are a set of images and a graph showing that SMC treatment does not affect OV distribution or replication in vivo.
- FIG. 12A is a set of images showing images from an experiment in which EMT6-bearing mice were treated with 50 mg/kg LCL1 61 (p.o.) and 5x1 0 8 PFU firefly luciferase tagged VSVA51 (VSVA51 -Flue) via i.v. injection. Virus distribution and replication was imaged at 24 and 48 hours using the I VIS. Outline denotes region of tumors. Representative data from two independent experiments are shown. Arrow indicates spleen infected with VSVA51 -Flue.
- FIG. 1 2B is a graph showing data from an experiment in which tumors and tissues at 48 hour post-infection were homogenized and virus titrations were performed for each group. Error bars, mean ⁇ s.e.m.
- FIGS. 13A and 13B are images showing verification of siRNA-mediated knockdown of non- targeting (NT), TN FR1 , DR5 and IFNAR1 by immunoblotting.
- FIG. 1 3A is an immunoblot showing knockdown in samples from the experiment of FIG. 3A.
- FIG. 13B is an immunoblot showing knockdown in samples from the experiment of FIG. 3B.
- FIGS. 14A-14G are images and graphs showing that SMC synergizes with OVs to induce caspase-8- and RI P-1 -dependent apoptosis in cancer cells. All panels of FIG. 14 show representative data from three independent experiments using biological replicates.
- FIG. 14A is a pair of images of immunoblots in which immunoblotting for caspase and PARP activation was conducted on cells pretreated with LCL1 61 and subsequently treated with 1 MOI of VSVA51 .
- FIG. 1 4B is a series of images showing micrographs of caspase activation that were acquired with cells that were co-treated with LCL1 61 and VSVA51 in the presence of the caspase-3/7 substrate DEVD-488.
- FIG. 14A is a pair of images of immunoblots in which immunoblotting for caspase and PARP activation was conducted on cells pretreated with LCL1 61 and subsequently treated with 1 MOI of VSVA51 .
- FIG. 1 4B is
- FIG. 14D is a series of images from an experiment in which apoptosis was assessed by micrographs of translocated phosphatidyl serine (Annexin V-CF594) and loss of plasma membrane integrity (YOYO-1 ) in cells treated with LCL1 61 and VSVA51 .
- FIG. 14G is an image of an immunoblot showing representative siRNA efficacy for the experiment of FIG. 14F.
- FIGS. 15A and 15B are a set of graphs showing that expression of TNFa transgene from OVs potentiates SMC-mediated cancer cell death further.
- FIG. 1 5A is a pair of graphs showing Alamar blue viability assay of cells co-treated with 5 ⁇ SMC and increasing MOIs of VSVA51 -GFP or VSVA51 -TNFa for 24 hours. Error bars, mean ⁇ s.d.
- FIG. 16 is a set of images showing that oncolytic virus infection leads to enhanced TNFa expression upon SMC treatment. EMT6 cells were co-treated with 5 ⁇ SMC and 0.1 MOI VSVA51 -GFP for 24 hours, and cells were processed for the presence of intracellular TNFa via flow cytometry. Images show representative data from four independent experiments.
- FIG. 1 7A is a graph showing the results of an Alamar blue viability assay of EMT6 cells transfected with nontargeting (NT) or TN F-R1 siRNA and subsequently treated with LCL1 61 and VSVA51 (0.1 MOI) or l FN . Error bars, mean ⁇ s.d.
- FIG. 17B is a representative siRNA efficacy blot from the experiment of FIG. 1 7A.
- FIG. 17C is a graph showing the viability of EMT6 cells that were pretreated with TNFa neutralizing antibodies and subsequently treated with 5 ⁇ SMC and VSVA51 or I FN .
- FIGS. 18A and 18B are a schematic of OV-induced type I IFN and SMC synergy in bystander cancer cell death.
- FIG. 1 8A is a schematic showing that virus infection in refractory cancer cells leads to the production of Type 1 I FN, which subsequently induces expression of I FN stimulated genes, such as TRAIL.
- Type 1 I FN stimulation also leads to the N F-KB-dependent production of TNFa.
- IAP antagonism by SMC treatment leads to upregulation of TNFa and TRAIL expression and apoptosis of neighboring tumor cells.
- FIG. 1 8A is a schematic showing that virus infection in refractory cancer cells leads to the production of Type 1 I FN, which subsequently induces expression of I FN stimulated genes, such as TRAIL.
- Type 1 I FN stimulation also leads to the N F-KB-dependent production of TNFa.
- IAP antagonism by SMC treatment leads to upregulation of TNFa and TRAIL expression and
- 18B is a schematic showing that infection of a single tumor cell results in the activation of innate antiviral Type 1 I FN pathway, leading to the secretion of Type 1 I FNs onto neighboring cells.
- the neighboring cells also produce the proinflammatory cytokines TNFa and TRAIL.
- the singly infected cell undergoes oncolysis and the remainder of the tumor mass remains intact.
- neighboring cells undergo bystander cell death due upon SMC treatment as a result of the SMC-mediated upregulation of TNFa/TRAIL and promotion of apoptosis upon proinflammatory cytokine activation.
- FIGS. 19A and 19B are a graph and a blot showing that SMC treatment causes minimal transient weight loss and leads to downregulation of clAP1 /2.
- FIG. 19B is a blot of samples from an experiment in which EMT6-tumor bearing mice were treated with 50 mg/kg LCL161 (p.o.). Tumors were harvested at the indicated time for western blotting using the indicated antibodies.
- FIGS. 20A-20C are a set of graphs showing that SMC treatment induces transient weight loss in a syngeneic mouse model of cancer.
- FIGS. 20A-20C are graphs showing measurements of mouse weights upon SMC and oncolytic VSV (FIG. 20A), poly(l :C) (FIG. 20B), or CpG (FIG. 20C) co-treatment in tumor-bearing animals from the experiments depicted in FIGS. 4A, 5B, and 5D, respectively. Error bars, mean ⁇ s.e.m.
- FIGS. 21 A-21 D are a series of graphs showing that VSVA51 -induced cell death in HT-29 cell is potentiated by SMC treatment in vitro and in vivo.
- FIG. 21 A is a graph showing data from an experiment in which cells were infected with VSVA51 , the cell culture supernatant was exposed to UV light for 1 hour and was applied to new cells at the indicated dose in the presence of LCL1 61 . Viability was ascertained by Alamar blue. Error bars, mean ⁇ s.d.
- FIG. 21 B is a graph showing Alamar blue viability of cells co- treated with LCL1 61 and a non-spreading virus VSVA51 AG (0.1 MOI).
- the left panel depicts tumor growth relative to day 0 post-treatment.
- the right panel represents the Kaplan-Meier curve depicting mouse survival.
- FIG. 21 D is a graph showing measurement of mouse weights upon SMC and OV co-treatment in tumor-bearing animals. Error bars, mean ⁇ s.e.m.
- FIG. 22 is a blot showing that type I IFN signaling is required for SMC and OV synergy in vivo.
- EMT6 tumor bearing mice were treated with vehicle or 50 mg/kg LCL1 61 for 4 hours, and subsequently treated with neutralizing I FNAR1 or isotype antibodies for 20 hours. Subsequently, animals were treated with PBS or VSVA51 for 18 hours. Tumors were processed for Western blotting with the indicated antibodies.
- FIGS. 23A and 23B are a pair of graphs showing that oncolytic infection of innate immune cells leads to cancer cell death in the presence of SMCs.
- FIG. 23A is a graph showing data from an experiment in which immune subpopulations were sorted from splenocytes (CD1 1 b+ F4/80+:
- FIG. 23B is a chart showing data from an experiment in which bone marrow derived macrophages were infected with VSVA51 and the supernatant was applied to EMT6 cells in the presence of 5 ⁇ SMC, and viability was measured by Alamar blue. Error bars, mean ⁇ s.d.
- FIGS. 24A-24H are a series of images of full-length immunoblots. Immunoblots of FIGS. 24A- 24H pertain to (a) FIG. 2E, (b) FIG. 4E, (c) FIG. 1 0B, (d) FIG. 13, (e) FIG. 14A, (f) FIG. 14G, (g) FIG. 1 9, and (h) FIG. 17, respectively.
- FIGS. 25A and 25B are a set of graphs showing that non-replicating rhabdovirus-derived particles (NRRPs) synergize with SMCs to cause cancer cell death.
- FIG. 25A is a set of graphs showing data from an experiment in which EMT6, DBT, and CT-2A cancer cells were co-treated with the SMC LCL1 61 (SMC; EMT6: 5 ⁇ , DBT and CT-2A: 1 5 ⁇ ) and different numbers of NRRPs for 48 hr (EMT6) or 72 hr (DBT, CT-2A), and cell viability was assessed by Alamar Blue.
- 25B is a pair of graphs showing data from an experiment in which unfractionated mouse splenocytes were incubated with 1 particle per cell of NRRP or 250 ⁇ CpG ODN 221 6 for 24 hr. Subsequently, the supernatant was applied to EMT6 cells in a dose-response fashion, and 5 ⁇ LCL1 61 was added. EMT6 viability was assessed 48 hr post- treatment by Alamar blue.
- FIGS. 26A and 26B are a graph and a set of image showing that vaccines synergize with SMCs to cause cancer cell death.
- FIG. 26A is a graph showing data from an experiment in which EMT6 cells were treated with vehicle or 5 ⁇ LCL1 61 (SMC) and 1 000 CFU/mL BCG or 1 ng/mL TN Fa for 48 hr, and viability was assessed by Alamar blue.
- SMC 5 ⁇ LCL1 61
- 26B is a set of representative I VI S images depicting survival of mice bearing mammary fat pad tumors (EMT6-Fluc) that were treated twice with vehicle or 50 mg/kg LCL1 61 (SMC) and PBS intratumorally (i.t.), BCG (1 x1 0 5 CFU) i.t, or BCG (1 x1 0 5 CFU) intraperitoneal ⁇ (i.p.) and subjected to live tumor bioluminescence imaging by I VIS CCD camera at various time points. Scale: p/sec/cm2/sr.
- FIGS. 27A and 27B are a pair of graphs and a set of images showing that SMCs synergize with type I I FN to cause mammary tumor regression.
- FIG. 27A is a pair of graphs showing data from an experiment in which mice were injected with EMT6-Fluc tumors in the mammary fat pad and were treated at eight days post-implantation with combinations of vehicle or 50 mg/kg LCL161 (SMC) orally and bovine serum albumin (BSA), 1 g IFNa intraperitoneally (i.p.), or 2 ⁇ g IFNa intratumorally (i.t.).
- the left panel depicts tumor growth.
- the right panel represents the Kaplan-Meier curve depicting mouse survival. Error bars, mean ⁇ s.e.m.
- FIG. 27B is a series of representative I VIS images from the experiment described in FIG. 27A. Scale: p/sec/cm2/sr.
- FIGS. 28A-28C are graphs showing that VSV-I FN or VSV synergizes with SMCs to cause cancer cell death.
- FIG. 28A shows data from an experiment in which EMT6 cells were co-treated with vehicle or 5 ⁇ LCL1 61 (SMC) and differing multiplicity of infection (MOI) of VSVA51 -GFP, VSV-IFN , or VSV-NIS-I FN . Cell viability was assessed 48 hr post-treatment by Alamar blue.
- FIG. 28B are a pair of graphs where EMT6 mammary tumor bearing mice were treated twice with vehicle or 50 mg/kg LCL1 61 (SMC) orally and PBS or 1 x1 08 PFU of VSV-I FN -NIS intratumourally.
- FIG. 28C are a pair of graphs where EMT6 mammary tumor bearing mice were treated twice with vehicle or 50 mg/kg LCL1 61 orally and 1 x1 08 PFU of VSV intratumourally.
- FIG. 29 is a graph showing that non-viral and viral triggers induce robust expression of TN Fa in vivo.
- Mice were treated with 50 mg of poly(l :C) intraperitoneally or with intravenous injections of 5x10 8 PFU VSVA51 , VSV-ml FNp, or Maraba-MG1 . At the indicated times, serum was isolated and processed for ELISA to quantify the levels of TNFa.
- FIGS. 30A-30C are a set of graphs and images showing that virally-expressed proinflammatory cytokines synergizes with SMCs to induce mammary tumor regression.
- FIG. 30A is a pair of graphs showing data from an experiment in which mice were injected with EMT6-Fluc tumors in the mammary fat pad, and were treated at seven days post-implantation with combinations of vehicle or 50 mg/kg LCL161 (SMC) orally and PBS, 1 x1 0 8 PFU VSVA51 -memTNFa (i.v.), or 1 x1 0 8 PFU VSVA51 -solTNFa (i.v.).
- the left panel depicts tumor growth.
- FIG. 30B is a set of representative bioluminescent I VI S images that were acquired from the experiment described in FIG. 30A. Scale: p/sec/cm2/sr.
- FIG. 30C is a pair of graphs showing data from an experiment in which mice were injected with CT-26 tumors subcutaneously and were treated 1 0 days post-implantation with combinations of vehicle or 50 mg/kg LCL161 orally and either PBS or 1 x1 0 PFU VSVA51 -solTNFa intratumorally.
- the left panel depicts tumor growth.
- the right panel represents the Kaplan-Meier curve depicting mouse survival. Error bars, mean ⁇ s.e.m.
- FIGS. 31 A and 31 B are a set of images showing that SMC treatment leads to down-regulation of clAPI /2 protein in vivo in an orthotopic, syngeneic mouse model of glioblastoma.
- FIG. 31 A is an image showing an immunoblot from an experiment in which CT-2A cells were implanted intracranially and treated with 50 mg/kg orally of LCL161 (SMC) and tumors were excised at the indicated time points and processed for western blotting using antibodies against clAP1 /2, XI AP, and ⁇ -tubulin.
- SMC LCL161
- 31 B is an image showing an immunoblot from an experiment in which CT-2A cells were implanted intracranially and treated with 1 0 uL of 1 00 ⁇ LCL1 61 intratumorally and tumors were excised at the indicated time points and processed for western blotting using antibodies against clAP1 /2, XIAP, and ⁇ -tubulin.
- FIGS. 32A-32E are a set of graphs and images showing that a transient proinflammatory response in the brain synergizes with SMCs to cause glioblastoma cell death.
- FIG. 32A is a graph showing data from an experiment in which an ELISA was conducted to determine the levels of soluble TNFa from 300 mg of crude brain protein extract that was derived from mice injected intraperitoneally (i.p.) with PBS or 50 mg poly(l :C) for 12 or 24 h. Brain protein extracts were obtained by mechanical homogenization in saline solution.
- FIG. 32A is a graph showing data from an experiment in which an ELISA was conducted to determine the levels of soluble TNFa from 300 mg of crude brain protein extract that was derived from mice injected intraperitoneally (i.p.) with PBS or 50 mg poly(l :C) for 12 or 24 h. Brain protein extracts were obtained by mechanical homogenization in saline solution.
- FIG. 32B is a graph showing data from Alamar blue viability assays of mouse glioblastoma cells (CT-2A, K1 580) that were treated with 70 mg of crude brain homogenates and 5 ⁇ LCL1 61 (SMC) in culture for 48 h. Brain homogenates were obtained from mice that were treated for 1 2 h with i.p. injections of poly(l :C), or intravenous injections of 5x1 0 8 PFU VSVA51 or VSV-ml FNp.
- FIG. 32C represents the Kaplan-Meier curve depicting survival of mice that received three intracranial treatments of 50 mg poly(l:C). Treatments were on days 0, 3, and 7.
- FIG. 32D represents the Kaplan- Meier curve depicting survival of mice bearing CT-2A intracranial tumors that received combinations of SMC, VSVA51 or poly(l :C).
- Mice received combinations of three treatments of vehicle, three treatments of 75 mg/kg LCL1 61 (oral), three treatments of 5x10 8 PFU VSVA51 (i.v.), or two treatments of 50 mg poly(l :C) (intracranial, i.e.). Mice were treated on day 7, 1 0, and 14 post tumor cell implantation with the different conditions, except for the poly(l :C) treated group that received i.e. injections on day 7 and 1 5. Numbers in brackets denote number of mice per group.
- FIG. 32E is a series of representative MRI images of mouse skulls from the experiments depicted in FIG. 32D, which shows an animal at endpoint and a representative mouse of the indicated groups at 50 days post-implantation. Dashed line denotes the brain tumor.
- FIG. 33 is a graph showing that SMCs synergize with type I IFN to eradicate brain tumors.
- the graph represents the Kaplan-Meier curve depicting survival of mice bearing CT-2A that received intracranial injections of vehicle or 1 00 ⁇ LCL161 (SMC) with PBS or 1 I FNa at 7 days post- implantation.
- FIG. 34 is an overview of the NF- ⁇ signalling pathway.
- RI P1 receives K63 ubiquitin linkages from clAP1 /2 to form a signalling complex, which allows phosphorylation of the inhibitor of ⁇ ( ⁇ ) following activation of the ⁇ - inase (IKK). Phosphorylated ⁇ is degraded, freeing the p50/p65 heterodimer.
- the alternative pathway is kept inactive by clAP1 /2 K48 linked ubiquitination of NF- ⁇ inducing kinase (NIK).
- NIK When NIK is stable, it allows phosphorylation of IKK and downstream p100, resulting in processing of p100 to p52.
- the pathway culminates with N F- ⁇ heterodimers translocating to the nucleus to act as transcription factors to regulate expression of target genes.
- FIGS. 35A-35C describe the process of combining SMC with monoclonal antibodies against PD-1 delayed disease progression and prolonged survival in a murine MM model.
- FIG. 35A shows images of mice bearing MPC-1 1 Flue cells that were treated with 250 g of ICI and 50mg/kg three times/week for two weeks. Mice are treated with SMC and monoclonal antibodies against either PD-1 or CTLA-4. Mice treated with the combination of anti-PD-1 and SMC showed almost no tumour burden as determined by S bioluminescence images of the cancer burden on the days post cell implantation.
- FIG. 35B shows the treatment regimen with anti-PD-1 , anti-CTLA-4 and SMC.
- FIG. 35C is a graph showing the number of days mice survived post implantation of M PC-1 1 Flue cells as indicated in a Kaplan-Meier curve
- FIGS. 36A-36C are a series of graphs demonstrating that innate immune stimulants synergize with SMC to cause MM cell death.
- FIG. 36A is a series of bar graphs showing the viability of human cell lines U266, MM1 R, and MM 1 S that were treated with 1 ⁇ / ⁇ _ I FNa, IFNp, and I FNy in the presence of either vehicle or 5 ⁇ SMC. Viability was determined by trypan blue exclusion after 24 hours.
- FIG. 36B and FIG. 36C are graphs showing the viability of the murine MM cell line M PC-1 1 that was treated with 5 ⁇ SMC and various multiplicity of infections (MOI) VSVA51 and VSVm l FN respectively. Viability was assessed after 24 hours with Alamar blue.
- MOI multiplicity of infections
- FIGS. 37A-37C show IFN and SMC synergize to delay MM disease progression in mice.
- Mice bearing M PC-1 1 Flue cells were treated with 1 ⁇ g of recombinant I FNa and 50 mg/kg SMC 3 times.
- FIG. 37A is a series of I VIS bioluminescence images of cancer burden taken at the indicated days post MM cell implantation.
- FIG. 37B is a Kaplan-Meier curve showing survival times.
- FIG. 37C is a schematic showing thetreatment regimen.
- FIGS. 38A-38C indicate that oncolytic virus can delay MM disease progression and increase survival.
- FIG. 38A is I VIS bioluminescence images taken at indicated days post implantation of mice bearing M PC-1 1 Flue cells that were treated 4 times with 5x10 8 pfu VSVA51 and 50 mg/kg SMC.
- FIG. 38A is I VIS bioluminescence images taken at indicated days post implantation of mice bearing M PC-1 1 Flue cells that were treated 4 times with 5x10 8 pfu VSVA51 and 50 mg/kg SMC.
- FIG. 38B is a Kaplan-Meier curve showing survival times.
- FIG. 38C shows the treatment regimen.
- FIGS. 39A-39C show glucocorticoid receptor ligands synergize with SMC to sensitize resistant cell lines to SMC-mediated cell death.
- FIG. 39A is a schematic showing protein was extracted from
- FIGS. 39B and 39C are graphs showing that cells were treated with 5 ⁇ SMC, 1 0 ⁇ Dex and 1 0 ⁇ RU486 for the indicated times and dead cells were determined as YOYO-1 positive, a cell impermeable DNA binding dye, and normalized to confluency of the cells within the well.
- FIGS. 40A-40C show SMC increases NF- ⁇ signalling and causes apoptosis.
- Human MM cell lines MM 1 R and MM1 S were treated with 5 ⁇ SMC then collected after 1 , 1 6 or 48 hours.
- FIG. 40A shows western blots for various components of N F- ⁇ pathway.
- FIGS. 40B and 40C are quantification of bands from FIG. 40A, expressed as ratios of p-p65 to p65 and p52:p1 00 respectively, that were normalized to an untreated control.
- FIG. 41 shows SMC and I FN combination treatment increases N F- ⁇ activity to cause apoptosis.
- Human cell lines U266, MM 1 R and MM1 S and murine cell line M PC-1 1 and a Flue tagged subline were treated with 5 ⁇ SMC and 1 ⁇ / ⁇ _ I FN for 1 or 1 6 hr. Cell pellets were harvested and lysates were loaded equally for western blotting.
- FIGS. 42A-42C shows an oncolytic virus combined with SMC activates NF- ⁇ signalling leading to apoptosis in murine MM cells.
- MPC-1 1 cells were treated with VSVA51 or VSVmlFN for 1 , 1 2, or 24 hours.
- FIGS. 42A and 42C are protein levels quantified from the bands in FIG. 42A and expressed as ratios of phospho-p65 to p65, or p52 to p1 00 respectively.
- FIG. 43 show PD-L1 and PD-L2 expression are increased in human MM cell lines after treatment with I FN .
- Expression of PD-L1 and PD-L2 mRNA are increased at 6, 1 2 and 24 hours posts I FN or IFN and SMC treatment relative to a no-treatment control.
- FIGS. 44A-44D are graphs showing that the combination of SMCs and immunomodulatory agents leads to cancer cell death that also involves CD8+ T cells.
- FIGS. 44A and 44B are graphs showing data from an experiment in which double treated cured mice were re-injected with EMT6 cells in the mammary fatpad (180 days from the initial post-implantation date) or reinjected with CT-2A cells intracranially (1 90 days from the initial post-implantation date).
- FIG. 44C is a graph showing data from an experiment in which CT-2A glioma or EMT6 breast cancer cells were trypsinized, surface stained with conjugated isotype control IgG or anti-PD-L1 and processed for flow cytometry.
- 44D is a graph showing data from an experiment in which CD8+ T-cells were enriched from splenocytes (from nal ' ve mice or mice previously cured of EMT6 tumours) using a CD8 T-cell positive magnetic selection kit, and subjected to ELISpot assays for the detection of I FNy and Granzyme B.
- CD8+ T-cells were co-cultured with media or cancer cells (12:1 ratio of cancer cells to CD8+ T-cells) and 1 0 mg of control IgG or anti- PD-1 for 48 hr. Three mice were used as independent biological replicates (were previously cured of EMT6 tumors). 4T1 cells serve as a negative control as 4T1 and EMT6 cells carry the same major histocompatibility antigens.
- FIGS. 45A-45D are graphs showing that SMCs synergize with immune checkpoint inhibitors in orthotopic mouse models of cancer.
- FIG. 45A is graph showing data in which EMT6 mammary tumor bearing mice were treated once with PBS or 1 x1 08 PFU VSVD51 intratumorally, and five days later, the mice were treated with combinations of vehicle or 50 mg/kg LCL1 61 (SMC) orally and 250 mg of anti-PD- intraperitoneally (i.p.).
- SMC LCL1 61
- 45B and 45C are graphs showing data in which mice bearing intracranial CT-2A or GL261 tumors were treated four times with vehicle or 75 mg/kg LCL161 (oral) and 250 mg (i.p.) of control IgG, anti-PD-1 or anti-CTLA-4.
- FIG. 45D is a graph showing data in which athymic CD-1 nude mice bearing CT-2A intracranial tumors were treated with 75 mg/kg LCL1 61 (oral) and 250 mg (i.p.) anti- PD-1 .
- FIGS. 46A-46C are graphs showing that SMCs induces the death of glioblastoma cells in the presence of cytokines or oncolytic viruses.
- Alamar blue viability assay of human (M059K, SNB75, U1 1 8) and mouse (CT-2A, GL261 ) glioblastoma cells treated with vehicle or 5 ⁇ LCL1 61 (SMC) and 0.1 ng mL-1 of TNF-a or 0.01 MOI of VSVA51 for 48 h (FIG. 46A). Error bars, mean, s.d. n 4.
- FIGS. 46A and 46B show representative data from three independent experiments using biological replicates. Statistical significance was compared to vehicle and BSA treatment using ANOVA using Dunnett's multiple comparison test. Significance is reported if p ⁇ 0.0001 (*).
- FIG. 47 is a graph showing that SMCs potently synergize with TN F-a to induce the death of glioblastoma cells.
- Viability of mouse glioblastoma CT-2A cells to the treatment of 0.01 % BSA or 0.1 ng mL-1 TNF-a and vehicle or 5 ⁇ of the indicated monomeric or dimeric for 48 h. Viability was assessed by Alamar blue. Error bars, mean, s.d. n 4. Representative data from two independent experiments using biological replicates. Statistical significance was compared to vehicle and BSA treatment using ANOVA using Dunnett's multiple comparison test. Significance is reported if p ⁇ 0.0001 (*).
- FIGS. 48A and 48B is a series of graphs and an image showing that resistance to SMC-based combinations in glioblastoma cells is circumvented with downregulation of cFLI P.
- Primary mouse NF1 - /+p53-/+ (K5001 ) or human (SF539) glioblastoma cells or human nontransformed cells (GM38) were transfected with nontargeting (NT) or cFLI P siRNA for 48 h and subsequently treated for 48 h with vehicle or 5 ⁇ LCL1 61 (SMC) and BSA, 0.1 ng mL-1 TNF-a or the indicated MOI of a nonspreading version of VSVA51 (VSVA51 AG; FIG. 48A).
- FIGS. 49A and 49B are images showing establishment of a mouse syngeneic orthotopic model of glioblastoma. Shown are MRI (FIG. 49A) and gross (FIG. 49B) images of a C57BL/6 mouse injected intracranially with PBS or 5x10 4 CT-2A cells and sacrificed at 35 days post-implantation. Scale bar, 2 mm. Ruler is in cm with mm divisions.
- 50B shows data representing the Kaplan- Meier curve depicting mouse survival.
- Numbers in parentheses represent number of mice per group.
- FIGS. 52A-52C are graphs showing that SMC-based combination treatment results in long-term immunological anti-tumor memory.
- CT-2A cells were treated for 24 h with vehicle or 5 ⁇ LCL1 61 (SMC) and 0.01 % BSA, 1 ng mL-1 TNF-a, 250 U mL-1 I FN- ⁇ or 0.1 MOI of VSVA51 , and viable cells (Zombie Green negative) were analyzed by flow cytometry using the indicated antibodies (FIG. 52A).
- FIG. 53 is a graph showing that SMC treatment does not abrogate expression of checkpoint inhibitor molecules or M HC l/l I proteins.
- SNB75 cells were treated for 24 h with vehicle or 5 ⁇ LCL1 61 (SMC) and 1 ng mL-1 TNF-a, 250 U mL-1 IFN- ⁇ or 0.1 MOI of VSVA51 , and viable cells (Zombie Green negative) were processed for flow cytometry using the indicated antibodies. Representative data from three independent experiments.
- FIGS. 54A-54G are graphs showing that SMCs synergize with antibodies targeting immune checkpoints mouse models of glioblastoma.
- Splenic CD8+ T-cells were enriched from naive mice or mice previously cured of CT-2A tumors, and subjected to ELISpot assays for the detection of I FN- ⁇ and GrzB.
- Cancer cells (CT- 2A, LLC) were cocultured with CD8+ cells (25:1 ratio) and 10 ⁇ g mL-1 of control IgG or a-PD-1 for 48 h.
- n 4 of mice per group (FIG. 54A).
- FIG. 54F and 250 Mg of IgG, a-PD-1 or a-CTLA4 (i.p.) or both combined (FIG. 54G).
- Data represents the Kaplan-Meier curve depicting mouse survival.
- Numbers in parentheses represent number of mice per group.
- FIG. 54D shows representative data from two independent experiments.
- FIG. 55 is a series of graphs showing that SMC treatment leads to the upregulation of PD-1 in CD8 T-cells.
- Mice bearing intracranial CT-2A tumors were treated with 75 mg kg-1 LCL1 61 orally (SMC) on post-implantation days 14, 1 6, 21 , and 23.
- Viable cells from CT-2A tumors were processed for flow cytometry using the antibodies CD45 (BV605), CD3 (APC-Cy7), CD8 (PE), and PD-1 (BV421 ).
- FIGS. 56A and 56B are graphs showing that SMCs synergize with immune checkpoint inhibitors for the treatment of a mouse model of multiple myeloma.
- FIGS. 57A-57C are graphs showing that the combination of SMCs with antibodies targeting immune checkpoint inhibitors in a mouse model of mammary cancer.
- Viability assay of EMT6 cells treated with vehicle or 5 ⁇ LCL1 61 (SMC) and 0.1 ng mL-1 TNF-a, 250 U mL-1 IFN- ⁇ or 0.1 MOI of VSVA51 for 48 h (FIG. 57A). Error bars, mean, s.d. n 4.
- Statistical significance was compared to vehicle and BSA treatment using ANOVA using Dunnett's multiple comparison test. Significance is reported if p ⁇ 0.0001 (***). Representative data from three independent experiments using biological replicates.
- EMT6 cells were dissociated and processed for flow cytometry with PE-Cy7-conjugated isotype IgG or PD-L1 (FIG. 57B). Representative data from three independent experiments. Mice bearing ⁇ 1 00 mm3 EMT6-Fluc tumors were treated at the indicated post-implantation times with PBS or 5x1 08 PFU of VSVA51 intratumorally, and then with vehicle or 50 mg/kg LCL1 61 (SMC) orally and 250 ⁇ g of IgG or a-PD-1 intraperitoneally (FIG. 57C). The left panel depicts tumor growth. Error bars, mean, s.e,m. Right panel represents the Kaplan-Meier curve depicting mouse survival. Log-rank with Holm- Sidak multiple comparison: *, p ⁇ 0.05; **, p ⁇ 0.01 . Numbers in parentheses represent number of mice per group.
- FIGS. 58A and 58B are graphs showing that the inclusion of SMCs increases the immune response in the presence of glioblastoma cells.
- the expression of the indicated factors was detected by ELISA from cell culture supernatants of CT-2A cells that were co-incubated for 48 h with splenocytes derived from naive mice or mice previously cured with intracranial CT-2A tumors by SMC and anti-PD-1 cotreatment (1 :20 ratio of CT-2A cells to splenocytes; FIG. 58A).
- Crosses depicts mean, solid horizontal line depicts median, box depicts 25th to 75th percentile, and whiskers depicts min-max range of the values.
- Statistical significance was compared to naive CD8+ T-cell as assessed by ANOVA with Dunnett's multiple comparison test. *, p ⁇ 0.05; ** p ⁇ 0.01 ; ***, p ⁇ 0.001 .
- the indicated cytokines were determined by ELISA from CT-2A cells that were cocultured with splenocytes derived from naive or cured mice and treated with vehicle or 5 ⁇ LCL1 61 (SMC) for 48 h (FIG. 58B). Crosses depicts mean, solid horizontal line depicts median, box depicts 25th to 75th percentile, and whiskers depicts min-max range of the values.
- Statistical significance was compared to vehicle and IgG treated T-cells as assessed by ANOVA with Dunnett's multiple comparison test. **p ⁇ 0.01 ; ***, p ⁇ 0.001 .
- FIGS. 59A-59E are images and graphs showing that CD8+ T-cells are required for synergy between SMC and immune checkpoint inhibitors for the treatment of glioblastoma.
- the expression of the indicated immune factors was detected by ELISA from cell culture supernatants of CT-2A cells that were co-incubated for 48 h with splenocytes derived from naive mice or mice previously cured of intracranial CT-2A tumors by SMC and anti-PD-1 cotreatment (1 :20 ratio of CT-2A cells to splenocytes; FIG. 59A).
- Data is plotted as heat maps using normalized scaling. Box and whisker plots of the data are shown in FIG. 58A.
- IgG, a-CD4 or a-CD8 all antibodies were 250 ⁇ g; FIG. 59D.
- CD-1 nude mice bearing intracranial CT-2A tumors were treated at the indicated times with combinations of vehicle or 75 mg kg-1 LCL161 orally and PBS or 250 ⁇ g of IgG or a-PD-1 intraperitoneally (i.p. ; FIG. 59E).
- Data represents the Kaplan-Meier curve depicting mouse survival. Log-rank with Holm-Sidak multiple comparison: *, p ⁇ 0.05; **, p ⁇ 0.01 . Numbers in parentheses represent number of mice per group.
- FIG. 60 is a series of graphs showing that combinatorial SMC and immune checkpoint inhibitor treatment leads to the increased systemic presence of proinflammatory cytokines.
- Serum from mice was processed for multiplex ELISA for the quantitation of the indicated proteins.
- FIGS. 61 A-61 G are graphs showing that SMC and immune checkpoint inhibitor treatment in mouse models of glioblastoma leads to changes in immune effector cell infiltration.
- Mice bearing intracranial CT-2A tumors were treated at the indicated times with vehicle or 75 mg kg-1 LCL1 61 orally (SMC) and 250 IgG or anti-PD-1 intraperitoneally (FIG. 61 A). Mice were sacrificed on d 27 post- implantation.
- Viable T-cells isolated from tumors were processed for flow cytometry using the following antibodies: CD45 (PE-Cy5), CD3 (APC), CD4 (PE-Cy7), CD8 (BV786), CD25 (BV605) and PD-1 (BV421 ;
- FIGS. 62A-62G are graphs and images showing that SMC and immune checkpoint inhibitor combination induces a proinflammatory cytokine response and efficacy is dependent on type I I FN signaling.
- Viable cells from brain tumors were isolated and processed for flow cytometry using the following antibodies: CD45 (BV605), CD3 (APC-Cy7), Cd4 (PE-Cy7), CD8 (BV786/0), I FN- ⁇ (BV421 ), TNF-a (PE) and GrzB (AF647; FIGS. 62A-62D).
- Crosses depicts mean, solid horizontal line depicts median, box depicts 25th to 75th percentile, and whiskers depicts min-max range of the values.
- mice bearing intracranial CT-2A tumors were treated at the indicated postimplantation day with vehicle or 75 mg kg-1 LCL1 61 (oral) or intraperitoneal ⁇ with the relevant isotype IgG control or 2.5 mg a-I FNAR1 , 350 ⁇ g a-I FN- ⁇ or 250 ⁇ g a-PD-1 (FIG. 62G). Significance was compared to vehicle and IgG treated mice as assessed by ANOVA with Dunnett's multiple comparison test. *, p ⁇ 0.05. Numbers in brackets denote the size of the treatment groups.
- FIG. 63 is an image showing that proinflammatory cytokine and chemoattractant chemokine gene signatures are upregulated with SMC and immune checkpoint inhibitor combinatorial treatment.
- FIG. 64 is a series of graphs showing that SMCs enhance clonal expansion of CD8+ T-cells in the presence of glioblastoma target cells.
- Isolated splenic CD8+ T-cells derived from mice previously cured of CT-2A tumors were loaded with CFSE and co-incubated with CT-2A cells (10:1 ratio) for 96 h in the presence of vehicle or 5 ⁇ LCL1 61 (SMC) or 20 ⁇ g mL-1 of control IgG or anti-PD1 .
- FIGS. 65A-65C are graphs and images showing that the proinflammatory cytokine TNF-a is required for T-cell mediated death of glioblastoma cells upon Smac mimetic and immune checkpoint inhibitor treatment.
- Isolated CD8 T-cells derived from the spleen and lymph nodes from mice previously cured of intracranial CT-2A tumors were cocultured with CT-2A cells in the presence of vehicle or 5 ⁇ LCL1 61 and 20 ⁇ g mL-1 isotype-matched IgG or a-PD-1 for 24 h.
- Viable T-cells were processed for flow cytometry using the following antibodies: CD3 (APC-Cy7), CD8 (BV71 1 ), GrzB (AF647) and TNF-a (PE; FIG. 65A).
- CD8+ T-cells were cocultured with mKate2-tagged CT-2A cells (CT-2A-mKate2) for 72 h in the presence of vehicle or 5 ⁇ LCL161 and 20 ⁇ g/mL of control IgG, a-PD-1 or a-TNF-a (FIG. 65B).
- Enumeration of mKate2-positive cells was acquired using the Incucyte Zoom software. Crosses depicts mean, solid horizontal line depicts median, box depicts 25th to 75th percentile, and whiskers depicts min-max range of the values.
- FIG. 66 is a schematic showing that SMCs are immunoregulatory drugs that act on tumor and immune cells to eradicate cancer through the innate and adaptive immune systems. Shown is a model depicting the single agent and combinatorial immunomodulatory effects of Smac mimetics based on our results.
- the effects of IAP antagonism on these immune or tumor cells are outlined below: (1 ) SMCs stimulates the production of cytokines and chemokines from various immune cells, such as macrophages or T-cells, which results in infiltration of immune cells within the tumor microenvironment. (2) SMC treatment decreases the immunosuppressive macrophage M2 population and concomitantly increases the pro-inflammatory M1 population.
- SMCs deplete clAP1 and clAP2 to sensitize tumors to death by immune ligands, such as TNF-a or TRAIL1 . Tumor cell death is sensed by the immune system resulting in the priming of a cytotoxic T-cell (CTL) response.
- CTL cytotoxic T-cell
- SMCs stimulate the TNF/TNFR family member CD40L/CD40 signaling pathway on antigen-presenting cells (APCs) to promote the TNF/TNFR family member CD40L/CD40 signaling pathway on antigen-presenting cells (APCs) to promote the TNF/TNFR family member CD40L/CD40 signaling pathway on antigen-presenting cells (APCs) to promote the TNF/TNFR family member CD40L/CD40 signaling pathway on antigen-presenting cells (APCs) to promote the TNF/TNFR family member CD40L/CD40 signaling pathway on antigen-presenting cells (APCs) to promote the TNF/TNFR family member CD40L/
- APCs dendritic cells
- APCs present tumor antigens to the immune system and further release cytotoxic inflammatory cytokines.
- SMCs activate the alternative NF- ⁇ pathway, removing the need for a TNF superfamily ligand (such as 4-1 BB) and therefore providing a T-cell costimulatory signal.
- SMCs have been shown to increase CTL and natural killer cell mediated cell death.
- Granzyme B-mediated cell death is blocked by the X-linked IAP, XIAP, and this block can be overcome by the mitochondrial release of Smac or by its drug mimic, SMC13-1 5.
- FIG. 67 is a schematic showing that cooperative and complimentary mechanisms for synergy between SMCs and immune checkpoint inhibitors (ICI).
- ICI immune checkpoint inhibitors
- TNFRSF Tumor Necrosis Factor Receptor Superfamily
- FIGS. 68A-68D are images showing full-length Western blots.
- the present invention includes methods and compositions for enhancing the efficacy of Smac mimetic compounds (SMCs) in the treatment of cancer.
- the present invention includes methods and compositions for combination therapies that include an SMC and a second agent that stimulates one or more cell death pathways that are inhibited by clAP1 and/or clAP2.
- the second agent may be, e.g., a TLR agonist a virus, such as an oncolytic virus, or an interferon or related agent.
- a pathogen mimetic e.g., a pathogen mimetic having a mechanism of action partially dependent on TRAIL
- this approach can evoke TN Fa-mediated apoptosis and necroptosis: given the plasticity and heterogeneity of some advanced cancers, treatments that simultaneously induce multiple distinct cell death mechanisms may have greater efficacy than those that do not.
- pathogen mimetics can elicit an integrated innate immune response that includes layers of negative feedback. These feedback mechanisms may act to temper the cytokine response in a manner difficult to replicate using recombinant proteins, and thus act as a safeguard to this combination therapy strategy.
- MM Multiple myeloma
- MM is an incurable cancer that is characterized by rapid expansion of plasma cells in the bone marrow.
- MM is the second most common haematological malignancy and has a median survival of only three to five years after diagnosis.
- the MM cells cause bone resorption leading to fractures and immune suppression as they populate the bone marrow compartment.
- MM cells can disseminate to other tissues to form plasmacytomas, and the disease can have an aggressive leukemic phase.
- Current therapies can prolong survival and mitigate symptoms, but they are no curative treatments. New therapies are urgent needed to combat treatment resistance and inevitable relapse.
- the malignant cells are reliant on the bone marrow microenvironment in early stages of the disease, specifically TNFa and interleukin-6 (IL-6) from cells within the bone marrow microenvironment. As the disease progresses, the cells become independent of their environment, surviving on high autocrine production of TNFa.
- TNFa tumor necrosis factor-6
- IL-6 interleukin-6
- N F-KB pathway contributes to the increase in efficacy of many standard therapeutics used in MM, such as the proteasome inhibitor bortezomib, immunomodulatory agents (IMiDs) thalidomide and lenalidomide and the synthetic glucocorticoid dexamethasone.
- IMS immunomodulatory agents
- TNFa-mediated NF- ⁇ signalling can be switched from a pro-survival signal to an apoptotic signal with the removal of the cellular inhibitors of apoptosis (clAPs); this process appears to be selective to cancer cells.
- clAP1 and clAP2 act interchangeably as E3 ligases in all members of the TNFa receptor superfamily, either ubiquitinating specific proteins to form a scaffold for signalling complexes, or targeting them for degradation.
- RI P1 is ubiquitinated via K63 linkages to form a scaffolding signalling complex that is required for the activation of the classical pathway whereas N IK receives a K48 linked ubiquitination targeting it for degradation, and keeping the alternative pathway inactive (FIG. 35).
- SMCs are a novel class of anti-cancer therapeutics that mimic the endogenous Smac protein, which is involved in the activation of the intrinsic apoptotic pathway. Smac peptide and SMCs bind to the BI R domain of clAPs, which causes them to auto- ubiquitinate, targeting them for proteasomal degradation.
- SMCs have been shown to have strong synergy with TN Fa to induce NF- ⁇ -mediated apoptosis in many cancer lines. SMCs also have synergistic cancer cell killing in combination other inflammatory cytokines such as I FNs, which can be induced by TLR agonists or oncolytic viruses. SMCs can even standardize therapeutics used for MM to enhance apoptosis of cancer cells. Several clinical trials that are currently being conducted for assessing the the efficacy of SMCs with chemotherapeutics in MM as well as other cancers have shown great therapeutic potential.
- cytokine production increases cytokine production, which is advantageous for SMC- mediated MM cell killing.
- cytokine production may have undesirable consequences on the MM cells.
- Many innate immune stimulants such as I FNs and TLR agonists, have been shown to upregulate ligands of the immune checkpoint PD-1 .
- PD-1 is expressed on the surface of T cells and NK cells.
- I FNs and TLR agonists have been shown to upregulate ligands of the immune checkpoint PD-1 .
- PD-1 is expressed on the surface of T cells and NK cells.
- PD-L1 and PD-L2 it acts as a co-inhibitory signal for the T cell receptor to supress the cytotoxic ability of T cells.
- PD-L1 is expressed constitutively at low levels in many tissues and can be upregulated, presumably to prevent autoimmune reactions.
- PD-L1 is upregulated on cancer cells, leading to the cells evading detection by the adaptive immune system.
- PD-L1 can be upregulated in MM in response to I FNy and TLR agonists such as LPS.
- PD-L2 has a much more selective expression compared to PD-L1 . It is present in a subset of B cells and upregulated on select cells in response to strong NF- ⁇ or STAT6 signalling.
- SMCs can also affect the function of T cells of SMC-treated mice both in vitro and in vivo, e.g., increased proliferation, increased cytokine production of activated T cells extracted from mouse spleens after exposure to SMCs, and higher cytokine production from NKT and NK cells. Additionally, mice treated with SMC exhibit hyperresponsive T cells upon antigen stimulation. Therefore a SMC-based combination therapy could not only increase the apoptosis of MM cells but may also stimulate a selective adaptive response. Combining SMCs with innate immune stimulants or immune checkpoint inhibitors (ICIs) may be the best approach to overcome the strong pro-survival signals the MM cells receive.
- ICIs immune checkpoint inhibitors
- Cancer cells are able to manipulate many of the pro-survival strategies healthy cells utilize in order to make them resistant to death-inducing signals.
- MM cells specifically are able to further amplify the constitutive N F- ⁇ signalling used in plasma cells to make them resistant to apoptotic stimuli. This is accomplished by increased expression of pro-survival NF- ⁇ target genes such as IL-6 and TNFa.
- MM cells are able to enhance expression of checkpoint inhibitors, which are presumably used to protect cells from inflammatory and cytotoxic environments; this helps them evade detection by T cells and NK cells. Targeting both apoptotic resistance and immune evasion in MM has the potential to overcome two of the major aspects of treatment resistance in this disease.
- PD-1 blockade is effective at delaying MM disease progression and improving the survival time of mice significantly as shown using the syngeneic murine MM model.
- Using a monoclonal antibody against PD-1 has several advantages compared to alternative approaches for immune checkpoint blockade. Firstly, it is able to block binding of both PD-I ligands, PD-L1 and PD-L2. Many cancers are able to upregulate PD-L1 in response to interferon treatment, and PD-1 /PD-L1 are upregulated in MM patients after treatment. Additionally, a subset of immature B cells, called B1 cells, which secrete non-specific antibodies, have shown high expression of PD-L2.
- PD-L2 expression can increase in response to certain stimuli, such as NF- ⁇ and STAT6 activation demonstrating the importance of examining expression levels of both ligands on MM cells.
- Human MM cells are able to upregulate both PD-1 ligands, making them unique in comparison to solid cancers.
- pembrolizumab and Curetech's pidilizumab
- it shows the value of using anti-PD-1 antibodies in MM.
- PD-1 targeted approaches have the potential to have a more robust response against the cancer in comparison to other ICIs such as anti-CTLA-4.
- the differences in activity may be due to the particular roles of these molecules in T cell regulation.
- PD-1 is often found on CD8+ T cells and engagement with its ligand inhibits the cytotoxic response activated by TCR signalling.
- CTLA-4 has a more prominent role in secondary lymphoid tissues on regulatory T cells.
- CTLA-4 engagement with its receptor, CD28 outcompetes and even down regulates the activating ligands for CD28, and causes dampening of T cell secondary clonal expansion. It is entirely possible that the lack of efficacy of anti-CTLA-4 treatment in Example 3 indicates MM invasion into secondary lymphoid organs.
- An SMC of the present invention may be any small molecule, compound, polypeptide, protein, or any complex thereof, capable, or predicted of being capable, of inhibiting clAP1 , clAP2 and/or XIAP, and, optionally, one or more additional endogenous Smac activities.
- An SMC of the present invention is capable of potentiating apoptosis by mimicking one or more activities of endogenous Smac, including but not limited to, the inhibition of clAP1 and the inhibition of clAP2.
- An endogenous Smac activity may be, e.g., interaction with a particular protein, inhibition of a particular protein's function, or inhibition of a particular IAP. In particular embodiments, the SMC inhibits both clAP1 and clAP2.
- the SMC inhibits one or more other lAPs in addition to clAP1 and clAP2, such as XIAP or Livin/ML-IAP, the single BI R-containing IAP.
- the SMC inhibits clAP1 , clAP2, and XIAP.
- an SMC having particular activities may be selected for combination with one or more particular immune stimulants.
- the SMC may be capable of activities of which Smac is not capable. In some instances, these additional activities may contribute to the efficacy of the methods or compositions of the present invention.
- Treatment with SMCs can deplete cells of clAP1 and clAP2, through, e.g., the induction of auto- or trans-ubiquitination and proteasomal-mediated degradation.
- SMCs can also de-repress XIAP's inhibition of caspases.
- SMCs may primarily function by targeting clAP1 and 2, and by converting TN Fa, and other cytokines or death ligands, from a survival signal to a death signal, e.g., for cancer cells.
- Certain SMCs inhibit at least XIAP and the clAPs.
- Such "pan-IAP" SMCs can intervene at multiple distinct yet interrelated stages of programmed cell death inhibition. This characteristic minimizes opportunities for cancers to develop resistance to treatment with a pan-IAP SMC, as multiple death pathways are affected by such an SMC, and allows synergy with existing and emerging cancer therapeutics that activate various apoptotic pathways in which SMCs can intervene.
- TNFa, TRAIL, and IL-1 ⁇ inflammatory cytokines or death ligands
- TNFa, TRAIL, and IL-1 ⁇ potently synergize with SMC therapy in many tumor-derived cell lines.
- TNFa, TRAIL, and dozens of other cytokines and chemokines can be upregulated in response to pathogen recognition by the innate immune system of a subject.
- this ancient response to microbial pathogens is usually self-limiting and safe for the subject, due to stringent negative regulation that limits the strength and duration of its activity.
- SMCs may be rationally designed based on Smac. The ability of a compound to potentiate apoptosis by mimicking one or more functions or activities of endogenous Smac can be predicted based on similarity to endogenous Smac or known SMCs.
- An SMC may be a compound, polypeptide, protein, or a complex of two or more compounds, polypeptides, or proteins.
- SMCs are small molecule IAP antagonists based on an N-terminal tetrapeptide sequence (revealed after processing) of the polypeptide Smac.
- an SMC is a monomer (monovalent) or dimer (bivalent).
- an SMC includes 1 or 2 moieties that mimic the tetrapeptide sequence of AVPI from Smac/DIABLO, the second mitochondrial activator of caspases, or other similar IBMs (e.g., IAP-binding motifs from other proteins like casp9).
- a dimeric SMC of the present invention may be a homodimer or a heterodimer.
- the dimer subunits are tethered by various linkers.
- the linkers may be in the same defined spot of either subunit, but could also be located at different anchor points (which may be 'aa' position, P1 , P2, P3 or P4, with sometimes a P5 group available).
- the dimer subunits may be in different orientations, e.g., head to tail, head to head, or tail to tail.
- the heterodimers can include two different monomers with differing affinities for different BI R domains or different lAPs.
- a heterodimer can include a Smac monomer and a ligand for another receptor or target which is not an IAP.
- an SMC can be cyclic. In some instances, an SMC can be trimeric or multimeric.
- a multimerized SMC can exhibit a fold increase in activity of 7,000-fold or more, such as 1 0-, 20-, 30-, 40-, 50-, 100-, 200-, 1 ,000-, 5,000-, 7,000-fold, or more (measured, e.g., by EC50 in vitro) over one or more corresponding monomers. This may occur, in some instances, e.g., because the tethering enhances the ubiquitination between lAPs or because the dual BI R binding enhances the stability of the interaction.
- multimers, such as dimers may exhibit increased activity, monomers may be preferable in some embodiments.
- a low molecular weight SMC may be preferable, e.g., for reasons related to bioavailability.
- an agent capable of inhibiting clAP1 /2 is a bestatin or
- Me-bestatin analog Bestatin or Me-bestatin analogs may induce clAP1 /2 autoubiquitination, mimicking the biological activity of Smac.
- an SMC combination treatment includes one or more SMCs and one or more interferon agents, such as an interferon type 1 agent, an interferon type 2 agent, and an interferon type 3 agent.
- interferon agents such as an interferon type 1 agent, an interferon type 2 agent, and an interferon type 3 agent.
- Combination treatments including an interferon agent may be useful in the treatment of cancer, such as multiple myeloma.
- a VSV expressing I FN, and optionally expressing a gene that enables imaging, such as N IS, the sodium-iodide symporter, is used in combination with an SMC.
- VSV may be used in combination with an SMC, such as the Ascentage Smac mimetic SM- 1387/APG-1387, the Novartis Smac mimetic LCL161 , or Birinapant.
- SMC such as the Ascentage Smac mimetic SM- 1387/APG-1387, the Novartis Smac mimetic LCL161 , or Birinapant.
- SMC Ascentage Smac mimetic SM- 1387/APG-1387
- Novartis Smac mimetic LCL161 the Novartis Smac mimetic LCL161
- Birinapant such as hepatocellular carcinoma or liver metastases.
- SMCs are known in the art. Non-limiting examples of SMCs are provided in Table 1 . While Table 1 includes suggested mechanisms by which various SMCs may function, methods and compositions of the present invention are not limited by or to these mechanisms.
- An immunostimulatory or immunomodulatory agent of the present invention may be any agent capable of inducing a receptor-mediated apoptotic program that is inhibited by clAP1 and clAP2 in one or more cells of a subject.
- An immune stimulant of the present invention may induce an apoptotic program regulated by clAP1 (BIRC2), clAP2 (BI RC3 or API2), and optionally, one or more additional lAPs, e.g., one or more of the human IAP proteins NAI P (BI RC1 ), XIAP (BIRC4), survivin (BI RC5), Apollon/Bruce (BIRC6), ML-IAP (BI RC7 or livin), and ILP-2 (BI RC8). It is additionally known that various aspects of the human IAP proteins NAI P (BI RC1 ), XIAP (BIRC4), survivin (BI RC5), Apollon/Bruce (BIRC6), ML-IAP
- immunomodulatory or agents such as CpGs or IAP antagonists, can change immune cell contexts.
- an immune stimulant may be a TLR agonist, such as a TLR ligand.
- a TLR agonist of the present invention may be an agonist of one or more of TLR-1 , TLR-2, TLR-3, TLR-4, TLR- 5, TLR-6, TLR-7, TLR-8, TLR-9, and TLR-1 0 in humans or related proteins in other species (e.g., murine TLR-1 to TLR-9 and TLR-1 1 to TLR-13).
- TLRs can recognize highly conserved structural motifs known as pathogen-associated microbial patterns (PAM Ps), which are exclusively expressed by microbial pathogens, as well as danger-associated molecular patterns (DAMPs) that are endogenous molecules released from necrotic or dying cells.
- PAM Ps pathogen-associated microbial patterns
- DAMPs danger-associated molecular patterns
- PAMPs include various bacterial cell wall components such as lipopolysaccharide (LPS), peptidoglycan (PGN), and lipopeptides, as well as flagellin, bacterial DNA, and viral double-stranded RNA.
- DAM Ps include intracellular proteins such as heat shock proteins as well as protein fragments from the extracellular matrix.
- Agonists of the present invention further include, for example, CpG oligodeoxynucleotides (CpG ODNs), such as Class A, B, and C CpG ODN's, base analogs, nucleic acids such as dsRNA or pathogen DNA, or pathogen or pathogen-like cells or virions.
- the agent is an agent that mimics a virus or bacteria or is a synthetic TLR agonist.
- TLR agonists are known in the art. Non-limiting examples of TLR agonists are provided in Table 2. While Table 2 includes suggested mechanisms, uses, or TLR targets by which various TLR agonists may function, methods and compositions of the present invention are not limited by or to these mechanisms, uses, or targets.
- AdilipolineTM (CL413;) Formula: C81 H145N17O12S Dual TLR agonist TLR-2 and TLR-7
- CL572 ( Formula: C41 H65N9O7S Dual TLR agonist Human TLR-2, mouse TLR-7, and human TLR-7
- AdiFectinTM (CL347;) Formula: TLR agonist and nucleic acid carrier TLR-7
- Imiquimod (InvivoGen) Imidazoquinoline compound; topical administration for treatment of basal cell carcinoma (see, e.g., Schulze HJ, Cribier B, Requena L, et al. Imiquimod 5% cream for the treatment of superficial basal cell carcinoma: results from a randomized vehicle-controlled Phase III study in Europe. Br. J. Dermatol. 2005; 152 (5): 939-947; Quirk C, Gebauer K, Owens M, Stampone P. Two-year interim results from a 5-year study evaluating clinical recurrence of superficial basal cell carcinoma after treatment with imiquimod 5% cream daily for 6 weeks. Australas. J. Dermatol. 2006; 47(4):258-265.);
- Topical administration for treatment of squamous cell carcinoma see, e.g., Ondo AL, Mings SM, Pestak RM, Shanler SD. Topical combination therapy for cutaneous squamous cell carcinoma in situ with 5-fluorouracil cream and imiquimod cream in patients who have failed topical monotherapy. J. Am. Acad. Dermatol. 2006; 55(6): 1092-1094.
- Topical administration for treatment of melanoma see, e.g., Turza K, Dengel LT, Harris RC, et al.
- imiquimod and intralesional interleukin-2 increase activated lymphocytes and restore the Th1 /Th2 balance in patients with metastatic melanoma.
- Topical administration for treatment of vulvar intraepithelial neoplasia see, e.g., Van Seters M, Van Beurden M, Ten Kate FJ, et al. Treatment of vulvar intraepithelial neoplasia with topical imiquimod. N. Engl. J. Med. 2008; 358(14):1465- 1473.);
- Topical administration for treatment of cutaneous lymphoma see, e.g., Stavrakoglou A, Brown VL, Coutts I. Successful treatment of primary cutaneous follicle centre lymphoma with topical 5% imiquimod. Br. J. Dermatol. 2007; 157(3): 620-622.);
- Topical treatment as Human papillomavirus (HPV) vaccine see, e.g., Daayana S, Elkord E, Winters U, et al. Phase II trial of imiquimod and HPV therapeutic vaccination in patients with vulval intraepithelial neoplasia. Br. J. Cancer. 2010; 102(7):1 129- 1 136.);
- Subcutaneous/intramuscular administration New York esophageal squamous cell carcinoma 1 cancer antigen (NY- ESO-1 ) protein vaccine for melanoma (see, e.g., Adams S, O'Neill DW, Nonaka D, et al. Immunization of malignant melanoma patients with full- length
- Monophosphoryl lipid A Subcutaneous/intramuscular TLR-4 (MPL) administration for vaccination
- CpG 7909 i.e., PF- Subcutaneous/intramuscular TLR-9 3512676 administration for treatment of non- small-cell lung cancer (see, e.g., PF- Subcutaneous/intramuscular TLR-9 3512676) administration for treatment of non- small-cell lung cancer (see, e.g., PF- Subcutaneous/intramuscular TLR-9 3512676) administration for treatment of non- small-cell lung cancer (see, e.g.,
- NSCLC non-small cell lung cancer
- NY-ESO-1 protein vaccine see, e.g., Valmori D, Souleimanian NE, Tosello V, et al. Vaccination with NY-ESO-1 protein and CpG in Montanide induces integrated antibody/Th1 responses and CD8 T cells through cross-
- an immune stimulant may be a virus, e.g., an oncolytic virus.
- An oncolytic virus is a virus that selectively infects, replicates, and/or selectively kills cancer cells.
- Viruses of the present invention include, without limitation, adenoviruses, Herpes simplex viruses, measles viruses, Newcastle disease viruses, parvoviruses, polioviruses, reoviruses, Seneca Valley viruses, retroviruses, Vaccinia viruses, vesicular stomatitis viruses, lentiviruses, rhabdoviruses, Sindvis viruses,
- the agent is a rhabodvirus, e.g., VSV. Rhabdoviruses can replicate quickly with high IFN production.
- the agent is a feral member, such as Maraba virus, with the MG1 double mutation, Farmington virus, Carajas virus.
- Viral agents of the present invention include mutant viruses (e.g., VSV with a ⁇ 51 mutation in the Matrix, or M, protein), transgene-modified viruses (e.g., VSV- hl FN ), viruses carrying -TNFa, -LTa/TNF , -TRAIL, FasL, -TL1 a, chimeric viruses (eg rabies), or pseudotyped viruses (e.g., viruses pseudotyped with G proteins from LCMV or other viruses).
- the virus of the present invention will be selected to reduce neurotoxicity. Viruses in general, and in particular oncolytic viruses, are known in the art.
- the agent is a killed VSV NRRP particle or a prime-and-boost tumor vaccine.
- NRRPs are wild type VSV that have been modified to produce an infectious vector that can no longer replicate or spread, but that retains oncolytic and immunostimulatory properties.
- NRRPs may be produced using gamma irradiation, UV, or busulfan.
- Particular combination therapies include prime-and- boost with adeno-MAGE3 (melanoma antigen) and/or Maraba-MG1 -MAGE3.
- Other particular combination therapies include UV-killed or gamma irradiation-killed wild-type VSV NRRPs.
- N RRPs may demonstrate low or absent neurotixicity.
- NRRPs may be useful, e.g., in the treatment of glioma, hematological (liquid) tumors, or multiple myeloma.
- the agent of the present invention is a vaccine strain, attenuated virus or microorganism, or killed virus or microorganism.
- the agent may be, e.g., BCG, live or dead Rabies vaccines, or an influenza vaccine.
- Non-limiting examples of viruses of the present invention e.g., oncolytic viruses, are provided in Table 3. While Table 3 includes suggested mechanisms or uses for the provided viruses, methods and compositions of the present invention are not limited by or to these mechanisms or uses.
- Talimogene GM-CSF Herpes simplex Phase 1 ; Solid tumors; IT; Completed; Hu JC, Coffin RS, Davis CJ, Graham laherparepvec virus NJ, Groves N, Guest PJ, Harrington KJ, James ND, Love CA, McNeish I,
- OncoVEXGM-CSF a second-generation oncolytic herpes simplex virus expressing granulocyte macrophage colony-stimulating factor. Clin Cancer Res. 2006 Nov 15;12(22):6737-47.
- Talimogene Us1 1 ⁇ Herpes simplex Phase 1 /2; SCCHN; IT; Completed; Harrington KJ, Hingorani M, Tanay MA, laherparepvec virus Hickey J, Bhide SA, Clarke PM, Renouf LC, Thway K, Sibtain A, McNeish IA,
- Oncolytic vaccinia virus expressing the human somatostatin receptor SSTR2 molecular imaging after systemic delivery using 1 1 1 ln-pentetreotide. Mol Ther. 2004 Sep;10(3):553-61 .
- VSV-hlFNp IFN- ⁇ Vesicular Phase 1 HCC; IT; recruiting
- DNX-2401 DNAtrix Adenovirus See, e.g., Molecular Therapy 21 (10): 1814-1818, 2013 and Journal of
- M and L genes originate from Grdzelishvili VZ.
- Vesicular stomatitis virus as a flexible platform for oncolytic the San Juan strain; G gene virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: from the Orsay strain (both 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Whelan SP, Ball LA, Barr JN, Indiana serotype).
- Rarely used Wertz GT Efficient recovery of infectious vesicular stomatitis virus entirely from in OV studies cDNA clones. Proc Natl Acad Sci U S A. 1995 Aug 29;92(18):8388-92.)
- VSV-WT-GFP - WT VSV encoding reporter Recombinant VSV used as oncolytic agent against cancer
- VSV-WT-GFP - WT VSV encoding reporter Recombinant VSV used as oncolytic agent against cancer
- oncolytic agent against cancer see, e.g., Hastie E, RFP, -Luc, - genes (between G and L) to Grdzelishvili VZ.
- Vesicular stomatitis virus as a flexible platform for oncolytic LacZ track virus infection. Based on virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi:
- VSV-G/GFP GFP sequence fused to VSV G Recombinant VSV used as oncolytic agent against cancer see, e.g., Hastie E, gene is inserted between the Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic WT G and L genes (in addition virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: to WT G). Toxicity similar to that 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Dalton, K. P. & Rose, J. K. (2001 ). of VSV-WT Vesicular stomatitis virus glycoprotein containing the entire green fluorescent protein on its cytoplasmic domain is incorporated efficiently into virus particles. Virology 279, 414-421 .)
- VSV-rp30 Derivative of VSV-G/GFP.
- Recombinant VSV used as oncolytic agent against cancer see, e.g., Hastie E,
- VSV-pl -GFP VSV expressing GFP or red Recombinant VSV used as oncolytic agent against cancer
- VSV-pl -RFP fluorescent protein RFP or Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic dsRed reporter gene at virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: position 1 . Attenuated because 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Wollmann, G., Rogulin, V., Simon, all VSV genes are moved I., Rose, J. K.
- VSV-c!G-GFP Similar to VSV-p1 -GFP or VSV- Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, (or RFP) pl -RFP described above, but Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic (replication- with the G gene deleted. virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: defective) Cannot generate a second 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Wollmann, G., Rogulin, V., Simon, round of infection. Poor ability I., Rose, J. K. & van den Pol, A. N. (2010). Some attenuated variants of to kill tumor cells vesicular stomatitis virus show enhanced oncolytic activity against human
- VSV-M6PY M mutant the M51 R mutation Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, >A4-R34E and was introduced into the M gene, Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic other M mutants and, in addition, the mutations virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi:
- VSV-M(mut) M mutant VSV M residues 52- Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E,
- Vesicular stomatitis virus expressing tumor suppressor p53 is a highly attenuated, potent oncolytic agent. J Virol 85, 10440-10450.
- VSV-G5, -G5R, G mutant VSV-expressing Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, -G6, -G6R mutant G with amino acid Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic substitutions at various virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: positions (between residues 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Janelle, V., Brassard, F., Lapierre, 100 and 471 ). Triggers type I P., Lamarre, A. & Poliquin, L.
- VSV-CT1 G mutant the cytoplasmic tail of Recombinant VSV used as oncolytic agent against cancer
- the G protein was truncated Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic from 29 to 1 aa. Decreased virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: neuropathology, but marginal 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Ozduman, K., Wollmann, G., oncolytic efficacy Ahmadi, S. A. & van den Pol, A. N. (2009).
- VSV-CT9-M51 G mutant the cytoplasmic tail of Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E,
- VSV-G was reduced from 29 to Grdzelishvili VZ.
- Vesicular stomatitis virus as a flexible platform for oncolytic 9 aa, also has ⁇ 51 mutation. virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: Attenuated neurotoxicity and 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Ozduman, K., Wollmann, G., good OV abilities Ahmadi, S. A. & van den Pol, A. N. (2009). Peripheral immunization blocks lethal actions of vesicular stomatitis virus within the brain.
- VSV Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E,
- VSV-S-GP Foreign glycoprotein; VSV with Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, the native G gene deleted and Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic replaced with a modified virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: glycoprotein protein (GP) from 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Bergman, I., Griffin, J. A., Gao, Y. Sindbis virus (SV). Also & Whitaker-Dowling, P. (2007).
- VSV-AG-SV5-F Foreign glycoprotein
- VSV G Recombinant VSV used as oncolytic agent against cancer see, e.g., Hastie E, gene is replaced with the Grdzelishvili VZ.
- Vesicular stomatitis virus as a flexible platform for oncolytic fusogenic simian parainfluenza virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: virus 5 fusion protein (SV5-F) 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Chang, G., Xu, S., Watanabe, M., gene Jayakar, H. R., Whitt, M. A. & Gingrich, J. R. (2010). Enhanced oncolytic activity of vesicular stomatitis virus encoding SV5-F protein against prostate cancer. J Urol 183, 161 1 -1618.)
- VSV-FAST Foreign glycoprotein
- VSV or Recombinant VSV used as oncolytic agent against cancer see, e.g., Hastie E,
- Vesicular stomatitis virus as a flexible platform for oncolytic
- VSV-LCMV-GP Foreign glycoprotein
- VSV Recombinant VSV used as oncolytic agent against cancer see, e.g., Hastie E, (replication- lacking the G gene was Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic defective) pseudotyped with the non- virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi:
- VSV-(MA51 )- Suicide gene VSV-MA51 Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, NIS expressing the human NIS Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic gene (for 'radiovirotherapy' virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: with 131 1) 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Goel, A., Carlson, S. K., Classic, K.
- VSV(D51 )-NIS an attenuated vesicular stomatitis virus encoding the sodium iodide symporter gene.
- VSV-TK Suicide gene VSV expressing Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E,
- TK can improve oncolysis if Grdzelishvili VZ.
- Vesicular stomatitis virus as a flexible platform for oncolytic used with non-toxic prodrug virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: ganciclovir 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Fernandez, M., Porosnicu, M.,
- VSV-mlFNp VSV-mlFNp, - Immunomodulation; VSV Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, hlFNp, VSV- expressing the murine (m), Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic rlFNp human (h) or rat (r) IFN- ⁇ gene virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi:
- VSV-IL4 Immunomodulation VSV Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, expressing IL-4 Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Fernandez, M., Porosnicu, M., Markovic, D. & Barber, G. N. (2002). Genetically engineered vesicular stomatitis virus in gene therapy: application for treatment of malignant disease. J Virol 76, 895-904.)
- VSV-IL12 Immunomodulation VSV Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, expressing IL-12 Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi:
- VSV-(A51 )-M3 Immunomodulation VSV-MA51 Recombinant VSV used as oncolytic agent against cancer (see, e.g., Hastie E, expressing the murine Grdzelishvili VZ. Vesicular stomatitis virus as a flexible platform for oncolytic gammaherpesvirus-68 virotherapy against cancer. J Gen Virol. 2012 Dec;93(Pt 12):2529-45. doi: chemokine-binding protein M3 10.1099/vir.0.046672-0. Epub 2012 Oct 10; Wu, L, Huang, T. G.,Meseck, M.,
- rVSV(MD51 )-M3 is an effective and safe oncolytic virus for cancer therapy.
- HSV-1 Genome and Structure ds Herpesviridae Clinical phase l/ll; Glioma; Wollmann et al. Oncolytic virus therapy for
- NDV Genome and Structure ss (-) Paramyxoviridae Clinical phase l/ll; Glioma; Wollmann et al. Oncolytic virus therapy for
- RNA; Enveloped glioblastoma multiforme concepts and candidates. Cancer J. 2012 Jan- Representative Host: Avian Feb;18(1 ):69-81
- Adeno Genome and Structure ds Adenoviridae Clinical phase I; Glioma; Wollmann et al. Oncolytic virus therapy for
- Vaccinia Genome and Structure ds Poxviridae Preclinical in vivo; Glioma; Wollmann et al. Oncolytic virus therapy for
- Polio Genome and Structure ss (+) Picornaviridae Clinical phase I; Glioma; Wollmann et al. Oncolytic virus therapy for
- VSV Genome and Structure ss (-) Rhabdoviridae Preclinical in vivo; Glioma; Wollmann et al. Oncolytic virus therapy for
- RNA; Enveloped glioblastoma multiforme concepts and candidates. Cancer J. 2012 Jan- Representative Host: Feb;18(1 ):69-81
- MVM Genome and Structure ss Parvoviridae Preclinical in vitro; Glioma; Wollmann et al. Oncolytic virus therapy for
- Sindbis Genome and Structure ss (+) Togaviridae Preclinical in vitro; Glioma; Wollmann et al. Oncolytic virus therapy for
- RNA; Enveloped glioblastoma multiforme concepts and candidates. Cancer J. 2012 Jan- Representative Host: Feb;18(1 ):69-81
- PRV Genome and Structure ds Herpesviridae Preclinical in vitro; Glioma; Wollmann et al. Oncolytic virus therapy for
- the methods and compositions of the present invention may be used to treat a wide variety of cancer types.
- One of skill in the art will appreciate that, since cells of many if not all cancers are capable of receptor-mediated apoptosis, the methods and compositions of the present invention are broadly applicable to many if not all cancers.
- the combinatorial approach of the present invention is efficacious in various aggressive, treatment refractory tumor models.
- the cancer treated by a method of the present invention may be adrenal cancer, basal cell carcinoma, biliary tract cancer, bladder cancer, bone cancer, brain and other central nervous system (CNS) cancer, breast cancer, cervical cancer, choriocarcinoma, colon cancer, colorectal cancer, connective tissue cancer, cancer of the digestive system, endometrial cancer, epipharyngeal carcinoma, esophageal cancer, eye cancer, gallbladder cancer, gastric cancer, cancer of the head and neck, hepatocellular carcinoma, intraepithelial neoplasm, kidney cancer, laryngeal cancer, leukemia, liver cancer, liver metastases, lung cancer, lymphomas including Hodgkin's and non-Hodgkin's lymphomas, melanoma, myeloma, multiple myeloma, neuroblastoma, mesothelioma, neuroglioma, myelodysplasia syndrome, multiple myelom
- CNS central nervous system
- ovarian cancer paediatric cancer, pancreatic cancer, pancreatic endocrine tumors, penile cancer, plasma cell tumors, pituitary adenomathymoma, prostate cancer, renal cell carcinoma, cancer of the respiratory system, rhabdomyosarcoma, salivary gland cancer, sarcoma, skin cancer, small bowel cancer, stomach cancer, testicular cancer, thyroid cancer, ureteral cancer, cancer of the urinary system, and other carcinomas and sarcomas.
- Other cancers are known in the art.
- the cancer may be a cancer that is refractory to treatment by SMCs alone.
- the methods and compositions of the present invention may be particularly useful in cancers that are refractory to treatment by SMCs alone.
- a cancer refractory to treatment with SMCs alone may be a cancer in which lAP-mediated apoptotic pathways are not significantly induced.
- a cancer of the present invention is a cancer in which one or more apoptotic pathways are not significantly induced, i.e., is not activated in a manner such that treatment with SMCs alone is sufficient to effectively treat the cancer.
- a cancer of the present invention can be a cancer in which a clAP1 /2-mediated apoptotic pathway is not significantly induced.
- a cancer of the present invention may be a cancer refractory to treatment by one or more agents.
- a cancer of the present invention may be a cancer refractory to treatment by one or more agents (absent an SMC) and also refractory to treatment by one or more SMCs (absent an agent).
- SMCs and/or agents may be administered in the form of salts, esters, amides, prodrugs, derivatives, and the like, provided the salt, ester, amide, prodrug or derivative is suitably pharmacologically effective, e.g., capable of potentiating apoptosis and/or treating cancer.
- Salts, esters, amides, prodrugs and other derivatives of an SMC or agent can be prepared using standard procedures known in the art of synthetic organic chemistry.
- an acid salt of SMCs and/or agents may be prepared from a free base form of the SMC or agent using conventional methodology that typically involves reaction with a suitable acid.
- the base form of the SMC or agent is dissolved in a polar organic solvent, such as methanol or ethanol, and the acid is added thereto.
- the resulting salt either precipitates or can be brought out of solution by addition of a less polar solvent.
- Suitable acids for preparing acid addition salts include, but are not limited to, both organic acids, e.g., acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, cinnamic acid, mandelic acid, methanesulfonic acid, ethanesulfonic acid, p-toluenesulfonic acid, salicylic acid, and the like, as well as inorganic acids, e.g., hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like.
- organic acids e.g., acetic acid, propionic acid, glycolic acid, pyruvic acid, oxalic acid, malic acid, malonic acid, succinic acid, maleic acid, fumaric acid, tartaric acid,
- An acid addition salt can be reconverted to the free base by treatment with a suitable base.
- Certain typical acid addition salts of SMCs and/or agents for example, halide salts, such as may be prepared using hydrochloric or hydrobromic acids.
- preparation of basic salts of SMCs and/or agents of the present invention may be prepared in a similar manner using a pharmaceutically acceptable base, such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, calcium hydroxide, trimethylamine, or the like.
- Certain typical basic salts include, but are not limited to, alkali metal salts, e.g., sodium salt, and copper salts.
- esters may involve functionalization of, e.g., hydroxyl and/or carboxyl groups that are present within the molecular structure of SMCs and/or agents.
- the esters are acyl-substituted derivatives of free alcohol groups, i.e., moieties derived from carboxylic acids of the formula RCOOH where R is alky, and preferably is lower alkyl.
- Esters may be reconverted to the free acids, if desired, by using conventional hydrogenolysis or hydrolysis procedures.
- Amides may also be prepared using techniques known in the art. For example, an amide may be prepared from an ester using suitable amine reactants or prepared from an anhydride or an acid chloride by reaction with ammonia or a lower alkyl amine.
- An SMC or agent of the present invention may be combined with a pharmaceutically acceptable carrier (excipient) to form a pharmacological composition.
- Pharmaceutically acceptable carriers can contain one or more physiologically acceptable compound(s) that act, e.g., to stabilize the composition, increase or decrease the absorption of the SMC or agent, or improve penetration of the blood brain barrier (where appropriate).
- physiologically acceptable compounds may include, e.g., carbohydrates (e.g., glucose, sucrose, or dextrans), antioxidants (e.g.
- a pharmaceutical formulation may enhance delivery or efficacy of an SMC or agent.
- an SMC or agent of the present invention may be prepared for parenteral, topical, oral, nasal (or otherwise inhaled), rectal, or local administration. Administration may occur, for example, transdermal ⁇ , prophylactically, or by aerosol.
- a pharmaceutical composition of the present invention may be administered in a variety of unit dosage forms depending upon the method of administration.
- Suitable unit dosage forms include, but are not limited to, powders, tablets, pills, capsules, lozenges, suppositories, patches, nasal sprays, injectibles, implantable sustained-release formulations, and lipid complexes.
- an excipient e.g., lactose, sucrose, starch, mannitol, etc.
- an optional disintegrator e.g. calcium carbonate, carboxymethylcellulose calcium, sodium starch glycollate, crospovidone, etc.
- a binder e.g. alpha-starch, gum arabic, microcrystalline cellulose
- a compressed product may be coated, e.g., to mask the taste of the compressed product, to promote enteric dissolution of the compressed product, or to promote sustained release of the SMC or agent.
- Suitable coating materials include, but are not limited to, ethyl-cellulose, hydroxymethylcellulose, polyoxyethylene glycol, cellulose acetate phthalate,
- physiologically acceptable compounds that may be included in a pharmaceutical composition including an SMC or agent may include wetting agents, emulsifying agents, dispersing agents or preservatives that are particularly useful for preventing the growth or action of microorganisms.
- Various preservatives are well known and include, for example, phenol and ascorbic acid.
- the choice of pharmaceutically acceptable carrier(s), including a physiologically acceptable compound depends, e.g., on the route of administration of the SMC or agent and on the particular physio-chemical characteristics of the SMC or agent.
- one or more excipients for use in a pharmaceutical composition including an SMC or agent may be sterile and/or substantially free of undesirable matter.
- Such compositions may be sterilized by conventional techniques known in the art.
- sterility is not required. Standards are known in the art, e.g., the USP/NF standard.
- An SMC or agent pharmaceutical composition of the present invention may be administered in a single or in multiple administrations depending on the dosage, the required frequency of administration, and the known or anticipated tolerance of the subject for the pharmaceutical composition with respect to dosages and frequency of administration.
- the composition may provide a sufficient quantity of an SMC or agent of the present invention to effectively treat cancer.
- the amount and/or concentration of an SMC or agent to be administered to a subject may vary widely, and will typically be selected primarily based on activity of the SMC or agent and the
- Dosages may be varied to optimize a therapeutic and/or prophylactic regimen in a particular subject or group of subjects.
- an SMC or agent of the present invention is administered to the oral cavity, e.g. , by the use of a lozenge, aersol spray, mouthwash, coated swab, or other mechanism known in the art.
- an SMC or agent of the present invention is administered using a slow- release solid wafer inserted in the brain cavity left upon tumor resection at the time of surgery.
- the wafer may be a biodegradable polyanhydride wafer containing an SMC or poly(l :C).
- the number of wafers placed may depend on the size of the resection cavity following surgical excision of the primary brain tumor. Delivery of drug from a slow-release wafer directly to brain tissue bypasses the problem of delivering systemic treatment across the blood-brain barrier.
- the polymer matrix may be comprised of a copolymer of 1 ,3-bis-(p-carboxyphenoxy) propane and sebacic acid (PCPP-SA; 80:20 molar ratio) that is dissolved in an organic solvent with drug, spraydried into microparticles ranging from 1 -20 ⁇ , and compression molded into wafers.
- PCPP-SA 1 ,3-bis-(p-carboxyphenoxy) propane and sebacic acid
- the rigid wafers degrade in a two-step process wherein water penetration hydrolyzes the anyhydride bonds during the first 1 0 hours followed by erosion of the copolymer into the surrounding aqueous environment.
- an SMC or agent of the present invention may be administered systemically (e.g., orally or as an injectable) in accordance with standard methods known in the art.
- the SMC or agent may be delivered through the skin using a transdermal drug delivery systems, i.e., transdermal "patches," wherein the SMCs or agents are typically contained within a laminated structure that serves as a drug delivery device to be affixed to the skin.
- the drug composition is typically contained in a layer or reservoir underlying an upper backing layer.
- the reservoir of a transdermal patch includes a quantity of an SMC or agent that is ultimately available for delivery to the surface of the skin.
- the reservoir may include, e.g., an SMC or agent of the present invention in an adhesive on a backing layer of the patch or in any of a variety of different matrix formulations known in the art.
- the patch may contain a single reservoir or multiple reservoirs.
- a reservoir may comprise a polymeric matrix of a pharmaceutically acceptable contact adhesive material that serves to affix the system to the skin during drug delivery.
- suitable skin contact adhesive materials include, but are not limited to, polyethylenes, polysiloxanes, polyisobutylenes, polyacrylates, and polyurethanes.
- the SMC and/or agent-containing reservoir and skin contact adhesive are present as separate and distinct layers, with the adhesive underlying the reservoir which, in this case, may be either a polymeric matrix as described above, a liquid or hydrogel reservoir, or another form of reservoir known in the art.
- the backing layer in these laminates which serves as the upper surface of the device, preferably functions as a primary structural element of the patch and provides the device with a substantial portion of flexibility.
- the material selected for the backing layer is preferably substantially impermeable to the SMC and/or agent and to any other materials that are present.
- Additional formulations for topical delivery include, but are not limited to, ointments, gels, sprays, fluids, and creams.
- Ointments are semisolid preparations that are typically based on petrolatum or other petroleum derivatives.
- Creams including an SMC or agent are typically viscous liquids or semisolid emulsions, e.g. oil-in-water or water-in-oil emulsions.
- Cream bases are typically water-washable and include an oil phase, an emulsifier, and an aqueous phase.
- the oil phase also sometimes called the "internal" phase, of a cream base is generally comprised of petrolatum and a fatty alcohol, e.g., cetyl alcohol or stearyl alcohol; the aqueous phase usually, although not necessarily, exceeds the oil phase in volume, and generally contains a humectant.
- the emulsifier in a cream formulation is generally a nonionic, anionic, cationic, or amphoteric surfactant.
- the specific ointment or cream base to be used may be selected to provide for optimum drug delivery according to the art. As with other carriers or vehicles, an ointment base may be inert, stable, non-irritating, and non-sensitizing.
- parenteral administration may include intraspinal, epidural, intrathecal, subcutaneous, or intravenous administration. Means of parenteral administration are known in the art. In particular embodiments, parenteral administration may include a subcutaneously implanted device.
- an SMC or agent it may be desirable to deliver an SMC or agent to the brain. In embodiments including system administration, this could require that the SMC or agent cross the blood brain barrier. In various embodiments this may be facilitated by co-administering an SMC or agent with carrier molecules, such as cationic dendrimers or arginine-rich peptides, which may carry an SMC or agent over the blood brain barrier.
- carrier molecules such as cationic dendrimers or arginine-rich peptides
- an SMC or agent may be delivered directly to the brain by administration through the implantation of a biocompatible release system (e.g., a reservoir), by direct administration through an implanted cannula, by administration through an implanted or partially implanted drug pump, or mechanisms of similar function known the art.
- a biocompatible release system e.g., a reservoir
- an SMC or agent may be systemically administered (e.g., injected into a vein).
- it is expected that the SMC or agent will be transported across the blood brain barrier without the use of additional compounds included in a pharmaceutical composition to enhance transport across the blood brain barrier.
- one or more an SMCs or agents of the present invention may be provided as a concentrate, e.g., in a storage container or soluble capsule ready for dilution or addition to a volume of water, alcohol, hydrogen peroxide, or other diluent.
- a concentrate of the present invention may be provided in a particular amount of an SMC or agent and/or a particular total volume. The concentrate may be formulated for dilution in a particular volume of diluents prior to administration.
- An SMC or agent may be administered orally in the form of tablets, capsules, elixirs or syrups, or rectally in the form of suppositories.
- the compound may also be administered topically in the form of foams, lotions, drops, creams, ointments, emollients, or gels.
- Parenteral administration of a compound is suitably performed, for example, in the form of saline solutions or with the compound incorporated into liposomes.
- a solubilizer such as ethanol, can be applied.
- Other suitable formulations and modes of administration are known or may be derived from the art.
- An SMC or agent of the present invention may be administered to a mammal in need thereof, such as a mammal diagnosed as having cancer.
- An SMC or agent of the present invention may be administered to potentiate apoptosis and/or treat cancer.
- a therapeutically effective dose of a pharmaceutical composition of the present invention may depend upon the age of the subject, the gender of the subject, the species of the subject, the particular pathology, the severity of the symptoms, and the general state of the subject's health.
- the present invention includes compositions and methods for the treatment of a human subject, such as a human subject having been diagnosed with cancer.
- a pharmaceutical composition of the present invention may be suitable for administration to an animal, e.g., for veterinary use.
- Certain embodiments of the present invention may include administration of a pharmaceutical composition of the present invention to non-human organisms, e.g., a non-human primates, canine, equine, feline, porcine, ungulate, or lagomorphs organism or other vertebrate species.
- Therapy according to the invention may be performed alone or in conjunction with another therapy, e.g., another cancer therapy, and may be provided at home, the doctor's office, a clinic, a hospital's outpatient department, or a hospital. Treatment optionally begins at a hospital so that the doctor can observe the therapy's effects closely and make any adjustments that are needed or it may begin on an outpatient basis.
- the duration of the therapy depends on the type of disease or disorder being treated, the age and condition of the subject, the stage and type of the subject's disease, and how the patient responds to the treatment.
- the combination of therapy of the present invention further includes treatment with a recombinant interferon, such as I FN-a, I FN- ⁇ , I FN- ⁇ , pegylated I FN, or liposomal interferon.
- a recombinant interferon such as I FN-a, I FN- ⁇ , I FN- ⁇ , pegylated I FN, or liposomal interferon.
- the combination of therapy of the present invention further includes treatment with recombinant TN F-a, e.g., for isolated-limb perfusion.
- the combination therapy of the present invention further includes treatment with one or more of a TN F-a or IFN-inducing compound, such as DMXAA, Ribavirin, or the like.
- CDNs Cyclic dinucleotides
- CDG cyclic di-GM P (guanosine 5'-monophosphate)
- CDA cyclic di-AM P (adenosine 5'-monophosphate)
- cGAM P cyclic GM P-AM P
- PAM Ps pathogen-associated molecular pattern molecules
- I RF3 interferon regulatory factor 3
- I FN type 1 interferon
- Routes of administration for the various embodiments include, but are not limited to, topical, transdermal, nasal, and systemic administration (such as, intravenous, intramuscular, subcutaneous, inhalation, rectal, buccal, vaginal, intraperitoneal, intraarticular, ophthalmic, otic, or oral administration).
- systemic administration refers to all nondermal routes of administration, and specifically excludes topical and transdermal routes of administration.
- the route of administration may be optimized based on the characteristics of the SMC or agent.
- the SMC or agent is a small molecule or compound.
- the SMC or agent is a nucleic acid.
- the agent may be a cell or virus.
- appropriate formulations and routes of administration will be selected in accordance with the art.
- an SMC and an agent are administered to a subject in need thereof, e.g., a subject having cancer.
- the SMC and agent will be administered simultaneously.
- the SMC and agent may be present in a single therapeutic dosage form.
- the SMC and agent may be administered separately to the subject in need thereof.
- the SMC and agent may be administered simultaneously or at different times.
- a subject will receive a single dosage of an SMC and a single dosage of an agent.
- one or more of the SMC and agent will be administered to a subject in two or more doses.
- the frequency of administration of an SMC and the frequency of administration of an agent are non-identical, i.e., the SMC is administered at a first frequence and the agent is administered at a second frequency.
- an SMC is administered within one week of the administration of an agent. In particular embodiments, an SMC is administered within 3 days (72 hours) of the administration of an agent. In still more particular embodiments, an SMC is administered within 1 day (24 hours) of the administration of an agent.
- the SMC and agent are administered within 28 days of each other or less, e.g., within 14 days of each other.
- the SMC and agent are administered, e.g., simultaneously or within 1 minute, 5 minutes, 1 0 minutes, 15 minutes, 30 minutes, 1 hour, 2 hours, 4 hours, 6 hours, 1 2 hours, 1 8 hours, 24 hours, 36 hours, 2 days, 4 days, 8 days, 1 0 days, 12 days, 16 days, 20 days, 24 days, or 28 days of each other.
- the first administration of an SMC of the present invention may precede the first administration of an agent of the present invention.
- the first administration of an SMC of the present invention may follow the first administration of an agent of the present invention.
- an SMC and/or agent of the present invention may be administered to a subject in two more doses, and because, in such instances, doses of the SMC and agent of the present invention may be administered at different frequencies, it is not required that the period of time between the administration of an SMC and the administration of an agent remain constant within a given course of treatment or for a given subject.
- the SMC and the agent may be administered in a low dosage or in a high dosage.
- the pharmacokinetic profiles for each agent can be suitably matched to the formulation, dosage, and route of administration, etc.
- the SMC is administered at a standard or high dosage and the agent is administered at a low dosage.
- the SMC is administered at a low dosage and the agent is administered at a standard or high dosage.
- both of the SMC and the agent are administered at a standard or high dosage.
- both of the SMC and the agent are administered at a low dosage.
- each component of the combination can be controlled independently. For example, one component may be administered three times per day, while the second component may be administered once per day or one component may be administered once per week, while the second component may be administered once per two weeks.
- Combination therapy may be given in on-and-off cycles that include rest periods so that the subject's body has a chance to recover from effects of treatment.
- kits of the invention contain one or more SMCs and one or more agents. These can be provided in the kit as separate compositions, or combined into a single composition as described above.
- the kits of the invention can also contain instructions for the administration of one or more SMCs and one or more agents.
- Kits of the invention can also contain instructions for administering an additional
- pharmacologically acceptable substance such as an agent known to treat cancer that is not an SMC or agent of the present invention.
- kits that contain, e.g. , two pills, a pill and a powder, a suppository and a liquid in a vial, two topical creams, ointments, foams etc.
- the kit can include optional components that aid in the administration of the unit dose to subjects, such as vials for reconstituting powder forms, syringes for injection, customized IV delivery systems, inhalers, etc.
- the unit dose kit can contain instructions for preparation and administration of the compositions.
- the kit may be manufactured as a single use unit dose for one subject, multiple uses for a particular subject (at a constant dosage regimen or in which the individual compounds may vary in potency as therapy progresses); or the kit may contain multiple doses suitable for administration to multiple subjects ("bulk packaging").
- the kit components may be assembled in cartons, blister packs, bottles, tubes, and the like.
- each compound of the claimed combinations depends on several factors, including: the administration method, the disease (e.g. , a type of cancer) to be treated, the severity of the disease, and the age, weight, and health of the person to be treated. Additionally, pharmacogenomic (the effect of genotype on the pharmacokinetic, pharmacodynamic or efficacy profile of a therapeutic) information about a particular subject may affect the dosage regimen or other aspects of administration.
- the disease e.g. , a type of cancer
- pharmacogenomic the effect of genotype on the pharmacokinetic, pharmacodynamic or efficacy profile of a therapeutic
- Example 1 Smac mimetics prime tumors for destruction by the innate immune system
- Smac mimetic compounds are a class of apoptosis sensitizing drugs that have proven safe in cancer patient Phase I trials. Stimulating an innate anti-pathogen response may generate a potent yet safe inflammatory "cytokine storm" that would trigger death of tumors treated with Smac mimetics.
- the present example demonstrates that activation of innate immune responses via oncolytic viruses and adjuvants, such as poly(l:C) and CpG, induces bystander death of cancer cells treated with Smac mimetics in a manner mediated by I FN , TNFa or TRAIL. This therapeutic strategy may lead to durable cures, e.g., in several aggressive mouse models of cancer. With these and other innate immune stimulants having demonstrated safety in human clinical trials, the data provided herein points strongly towards their combined use with Smac mimetics for treating cancer.
- the present example examines whether stimulating the innate immune system using pathogen mimetics would be a safe and effective strategy to generate a cytokine milieu necessary to initiate apoptosis in tumors treated with an SMC.
- non-pathogenic oncolytic viruses, as well as mimetics of microbial RNA or DNA, such as poly (l :C) and CpG induce bystander killing of cancer cells treated with an SMC that is dependent either upon I FN , TNFa, or TRAIL production.
- this therapeutic strategy was tolerable in vivo and led to durable cures in several aggressive mouse models of cancer.
- SMC therapy sensitizes cancer cells to bystander cell death during oncolytic virus infection
- Oncolytic viruses are emerging biotherapies for cancer currently in phase l-l l l clinical evaluation.
- LCL1 61 because this compound is the most clinically advanced drug in the SMC class, and VSVA51 because it is known to induce a robust antiviral cytokine response.
- SMC treatment enhanced sensitivity the EC50 of VSVA51 by 1 0 - 1 0,000 fold (FIG. 6, and representative examples in FIGS. 1 A and 1 B).
- low dose of VSVA51 reduced the EC50 of SMC therapy from undetermined levels (>2500 nM) to 4.5 and 21 .9 nM in two representative cell lines: the mouse mammary carcinoma EMT6 and the human glioblastoma SNB75 cells, respectively (FIG. 1 C).
- Combination index analyses determined that the interaction between SMC therapy and VSVA51 was synergistic (FIG. 7).
- rhabdoviruses VSVA51 and Maraba-MG1 are superior in eliciting bystander killing in synergizing with SMCs, compared to HSV, reovirus, vaccinia and wild-type VSV platforms, all of which have elaborate mechanisms to disarm aspects of innate immune signalling (FIGS. 9A and 9B).
- Genetic experiments using RNAi-mediated silencing demonstrated that both XIAP and the clAPs must be inhibited to obtain synergy with VSVA51 (FIGS. 1 0A, 10B, and 24C).
- VSVA51 elicits bystander cell death in IAP-depleted neighbouring cells not infected by the virus
- SMCs a low dose of VSVA51
- MOI 0.01 infectious particles per cell
- the cellular innate immune response to an RNA virus infection in mammalian tumor cells can be initiated by members of a family of cytosolic (RIG-l-like receptors, RLRs) and endosomal (toll-like receptors, TLRs) viral RNA sensors. Once triggered, these receptors can seed parallel I FN-response factor (I RF) 3/7 and nuclear-factor kappa B (NF- ⁇ ) cell signalling cascades. These signals can culminate in the production of IFNs and their responsive genes as well as an array of inflammatory chemokines and cytokines.
- I RF I FN-response factor
- NF- ⁇ nuclear-factor kappa B
- I FN production was measured in EMT6 and SNB75 cells treated with VSVA51 and SMCs.
- This experiment revealed that the SMC treated cancer cells respond to VSVA51 by secreting IFN (FIG. 2C), although at slightly lower levels as compared to VSVA51 alone. It was asked whether the dampened IFN secretion from SMC treated cells had any bearing on the induction of downstream IFN stimulated genes (ISGs).
- Quantitative RT-PCR analyses of a small panel of ISGs in cells treated with VSVA51 and SMC revealed that IAP inhibition had no bearing on ISG gene expression in response to an oncolytic VSV infection (FIG. 2D).
- I FNAR1 type I I FN receptor
- TRAIL is a well-established ISG that is responsive to type I I FN28.
- TN Fa and IL-1 ⁇ are considered to be independent of IFN signaling, but they are nevertheless responsive to N F- ⁇ signaling downstream of virus detection. This result suggests the possibility of a non-canonical type I I FN-dependant pathway for the production of TNFa and/or IL-1 ⁇ .
- type I I FNs I FNo/ ⁇
- type II I FN I FNy
- type I I I I FNs IL28/29
- Tumor cells infected by an oncolytic RNA virus up-regulate type I I FN, and this process is not affected by SMC antagonism of the IAP proteins.
- Those IFNs in turn signal to neighboring, uninfected cancer cells to express and secrete TNFa and TRAIL, a process that is enhanced by SMC treatment, which
- N/A LTB Lymphotoxin beta (TNF superfamily, member 3)
- Neurotrophin 5 Neurotrophin 4/5
- TNFSF13B Tumor necrosis factor (ligand) superfamily
- TNFSF4 Tumor necrosis factor (ligand) superfamily
- Fibroblast growth factor 9 (glia-activating factor)
- N/A N/A BMP15 Bone morphogenetic protein 15
- N/A N/A IL28A Interleukin 28A (interferon, lambda 2)
- N/A N/A TNFSF1 1 Tumor necrosis factor (ligand) superfamily, member 1 1
- N/A N/A TNFSF13 Tumor necrosis factor (ligand) superfamily member 13
- TNFSF9 Tumor necrosis factor (ligand) superfamily
- Oncolytic VSV potentiates SMC therapy in preclinical animal models of cancer
- HT-29 is a cell line that is highly responsive to bystander killing by SMC and VSVA51 co-treatment in vitro (FIGS. 21 A and 21 B). Similar to our findings in the EMT6 model system, combination therapy with SMC and VSVA51 induced tumor regression and a significant extension of mouse survival (FIG. 21 C). In contrast, neither monotherapy had any effect on HT-29 tumors. Furthermore, there was no additional weight loss in the double treated mice compared to SMC treated mice (FIG. 21 D). These results indicate that the synergy is highly efficacious in a refractory xenograft model and that the adaptive immune response does not have a major role initially in the efficacy of SMC and OV co-therapy.
- TNFa- or I FNp-mediated cell death in vivo It was investigated whether blocking TNFa signalling via neutralizing antibodies would affect SMC and VSVA51 synergy in the EMT6 tumor model. Compared to isotype matched antibody controls, the application of TN Fa neutralizing antibodies reverted the tumor regression and decreased the survival rate to values close to the control and single treatment groups (FIGS. 4F and 4G). This demonstrates that TNFa is required in vivo for the anti-tumor combination efficacy of SMC and oncolytic VSV.
- mice bearing EMT6 tumors were treated with I FNAR1 blocking antibodies.
- Mice treated with the I FNAR1 blocking antibody succumbed to viremia within 24-48 hours post infection. Prior to death, tumors were collected at 1 8-20 hours after virus infection, and the tumors were analyzed for caspase activity. Even though these animals with defective type I I FN signaling were ill due to a large viral burden, the excised tumors did not demonstrate signs of caspase-8 activity and only showed minimal signs of caspase-3 activity (FIG. 22) in contrast to the control group, which showed the expected activation of caspases within the tumor (FIG. 22). These results support the hypothesis that intact type I I FN signaling is required to mediate the anti-tumor effects of the combination approach.
- OV/SMC combination therapy treating EMT6 tumors was first attempted in immunodeficient NOD-scid or NSG (NOD-scid-IL2Rgamma nu ”) mice.
- NOD-scid-IL2Rgamma nu immunodeficient NOD-scid or NSG
- these mice also died rapidly due to viremia. Therefore, the contribution of innate immune cells was addressed by employing an ex vivo splenocyte culture system as a surrogate model. Innate immune populations that have the capacity to produce TNFa were positively selected and further sorted from naive splenocytes.
- Macrophages (CD1 1 b+ F4/80+), neutrophils (CD1 1 b+ Gr1 +), NK cells (CD1 1 b- CD49b+) and myeloid-negative (lymphoid) population (CD1 1 b- CD49-) were stimulated with VSVA51 , and the conditioned medium was transferred to EMT6 cells to measure cytotoxicity in the presence of SMC.
- VSVA51 -stimulated macrophages and neutrophils, but not NK cells are capable of producing factors that lead to cancer cell death in the presence of SMCs (FIG. 23A).
- Primary macrophages from bone marrow were also isolated and these macrophages also responded to oncolytic VSV infection in a dose-dependent manner to produce factors which kill EMT6 cells (FIG. 23B).
- Immune adjuvants poly(l:C) and CpG potentiate SMC therapy in vivo
- TLR agonists which are known to induce an innate proinflammatory response, would synergize with SMC therapy.
- EMT6 cells were co-cultured with mouse splenocytes in a transwell insert system, and the splenocytes were treated with SMC and agonists of TLR 3, 4, 7 or 9. All of the tested TLR agonists were found to induce the bystander death of SMC treated EMT6 cells (FIG. 5A).
- TLR3 agonist poly(l :C) led to EMT6 cell death directly in the presence of SMCs.
- Poly(l:C) and CpG were next tested in combination with SMC therapy in vivo. These agonists were chosen as they have proven to be safe in humans and are currently in numerous mid to late stage clinical trials for cancer.
- EMT6 tumors were established and treated as described above. While poly(l :C) treatment had no bearing on tumor growth as a single agent, combination with SMCs induced substantial tumor regression and, when delivered intraperitoneally, led to durable cures in 60% of the treated mice (FIGS. 5B and 5C).
- CpG monotherapy had no bearing on tumor size or survival, but when combined with SMC therapy led to tumor regressions and durable cures in 88% of the treated mice (FIGS. 5D and 5E).
- these combination therapies were well tolerated by the mice, and their body weight returned to pre-treatment levels shortly after the cessation of therapy (FIGS. 20B and 20C).
- the data demonstrate that a series of clinically advanced innate immune adjuvants strongly and safely synergize with SMC therapy in vivo, inducing tumor regression and durable cures in several treatment refractory, aggressive mouse models of cancer.
- Example 2 Inactivated viral particles, cancer vaccines, and stimulatory cytokines synergize with SMCs to kill tumors
- NRRPs non-replicating rhabdovirus-derived particles
- Type I IFN synergizes with SMCs in vivo
- VSVA51 is a preclinical candidate
- the oncolytic rhabdoviruses VSV-I FN and Maraba- MG1 are currently undergoing clinical testing in cancer patients.
- Maraba-MG1 synergizes with SMCs in vitro (FIG. 9).
- VSV-I FN and VSV-NIS-I FN i.e. carrying the imaging gene, NIS, sodium iodide symporter
- Example 1 we documented that a form of VSVA51 that was engineered to express full-length TNFa can enhance oncolytic virus induced death in the presence of SMC (FIG. 1 5). To expand on these findings, we also engineered VSVA51 to express a form of TNFa that had its intracellular and transmembrane components replaced with the secretory signal from human serum albumin (VSVA51 -solTNFa).
- solTNFa is constitutively secreted from host cells, while the memTNFa form may be anchored on plasma membrane (and still capable of inducing cell death in a juxtacrine manner) or is released due to endogenous processing by metalloproteases (such as ADAM 17) to kill cells in a paracrine fashion.
- metalloproteases such as ADAM 17
- TN Fa transgene within oncolytic viruses is a significant advantage for the combination of SMC.
- SMCs with immune stimulatory agents is applicable to many different types of cancer, including brain malignancies for which effective therapies are lacking and for which
- SM-1 22 and SM-1 64 were provided by Dr. Shaomeng Wang (University of Michigan, USA) (Sun, H. et al. Design, synthesis, and characterization of a potent, nonpeptide, cellpermeable, bivalent Smac mimetic that concurrently targets both the BIR2 and BI R3 domains in XIAP. J Am Chem Sod 29: 15279-1 5294 (2007)).
- AEG40730 (Bertrand, M. J. et al. clAP1 and clAP2 facilitate cancer cell survival by functioning as E3 ligases that promote RI P1 ubiquitination. Mol Cell 30: 689-700 (2008)) was synthesized by Vibrant Pharma Inc (Brantford, Canada). OICR720 was synthesized by the Ontario Institute for Cancer Research (Toronto, Canada) (Enwere, E. K. et al. TWEAK and clAP1 regulate myoblast fusion through the noncanonical NF-kappaB signalling pathway. Sci Signal 5: ra75 (2013)).
- I FNa, IFN , IL28 and IL29 were obtained from PBL Interferonsource (Piscataway, USA). All siRNAs were obtained from Dharmacon (Ottawa, Canada; ON TARGETplus SMARTpool).
- CpG-ODN 2216 was synthesized by I DT (5'- gggGGACGATCGTCgggggg-3' (SEQ I D NO: 1 ), lowercase indicates phosphorothioate linkages between these nucleotides, while italics identify three CpG motifs with phosphodiester linkages).
- Imiquimod was purchased from BioVision Inc. (Milpitas, USA).
- poly(l:C) was obtained from InvivoGen (San Diego, USA). LPS was from Sigma (Oakville, Canada).
- Cells were maintained at 37 °C and 5% C02 in DM EM media supplemented with 10% heat inactivated fetal calf serum, penicillin, streptomycin, and 1 % non-essential amino acids (Invitrogen, Burlington, USA). All of the cell lines were obtained from ATCC, with the following exceptions: SNB75 (Dr. D. Stojdl, Children's Hospital of Eastern Ontario Research Institute) and SF539 (UCSF Brain Tumor Bank). Cell lines were regularly tested for mycoplasma contamination. For siRNA transfections, cells were reverse transfected with Lipofectamine RNAiMAX (Invitrogen) or DharmaFECT I (Dharmacon) for 48 hours as per the manufacturer's protocol.
- RNAiMAX Invitrogen
- DharmaFECT I Dharmacon
- VSVA51 -GFP is a recombinant derivative of VSVA51 expressing jellyfish green fluorescent protein.
- VSVA51 -Fluc expresses firefly luciferase.
- VSVA51 with the deletion of the gene encoding for glycoprotein was propagated in HEK293T cells that were transfected with pMD2-G using Lipofectamine2000 (Invitrogen).
- VSVA51 -TNFa construct full-length human TNFa gene was inserted between the G and L viral genes. All VSVA51 viruses were purified on a sucrose cushion.
- Maraba-MG1 , VVDD-B1 8R-, Reovirus and HSV1 ICP34.5 were generated as previously described (Brun, J. et al. Identification of genetically modified Maraba virus as an oncolytic rhabdovirus. Mol Ther 1 8, 1440-1449 (201 0); Le Boeuf, F.
- Cell lines were seeded in 96-well plates and incubated overnight. Cells were treated with vehicle (0.05% DMSO) or 5 ⁇ LCL1 61 and infected with the indicated MOI of OV or treated with 250 U/mL IFN , 500 U/mL I FNa, 500 U/mL IFNy, 1 0 ng/mL IL28, or 1 0 ng/mL IL29 for 48 hours. Cell viability was determined by Alamar blue (Resazurin sodium salt (Sigma)) and data was normalized to vehicle treatment. The chosen sample size is consistent with previous reports that used similar analyses for viability assays.
- a confluent monolayer of 786-0 cells was overlaid with 0.7% agarose in complete media.
- a small hole was made with a pipette in the agarose overlay in the middle of the well where 5x10 3 PFU of VSVA51 -GFP was administered.
- Media containing vehicle or 5 ⁇ LCL1 61 was added on top of the overlay, cells were incubated for 4 days, fluorescent images were acquired, and cells were stained with crystal violet.
- Cells were treated with vehicle or 5 MM LCL161 for 2 hours and subsequently infected at the indicated MOI of VSVA51 for 1 hour. Cells were washed with PBS, and cells were replenished with vehicle or 5 MM LCL161 and incubated at 37°C. Aliquots were obtained at the indicated times and viral titers assessed by a standard plaque assay using African green monkey VERO cells.
- RNA was isolated from cells using the RNAEasy Mini Plus kit (Qiagen, Toronto, Canada). Two-step RT-qPCR was performed using Superscript I I I (Invitrogen) and SsoAdvanced SYBR Green supermix (BioRad, Mississauga, Canada) on a Mastercycler ep realplex (Eppendorf, Mississauga, Canada). All primers were obtained from realtimeprimers.com. An n 3 of biological replicates was used to determine statistical measures (mean, standard deviation). ELISA
- Mammary tumors were established by injecting 1 x1 0 5 wild-type EMT6 or firefly luciferase-tagged EMT6 (EMT6-Fluc) cells in the mammary fat pad of 6-week old female BALB/c mice.
- Mice with palpable tumors (-100 mm 3 ) were co-treated with either vehicle (30% 0.1 M HCI, 70% 0.1 M NaOAc pH 4.63) or 50 mg/kg LCL1 61 per os and either i.v. injections of either PBS or 5x1 0 8 PFU of VSVA51 twice weekly for two weeks.
- Tumor bioluminescence imaging was captured with a Xenogen 2000 I VIS CCD-camera system (Caliper Life Sciences
- a-TNFa XT3.1 1
- HRPN isotype control
- a-I FNAR1 MAR1 -5A3
- MOPC-21 isotype control
- EMT6 cells were co-treated with 0.1 MOI of VSVA51 -GFP and 5 ⁇ LCL1 61 for 20 hours.
- Cells were trypsinized, permeabilized with the CytoFix/CytoPerm kit (BD Biosciences) and stained with APC- TNFa (MP6-XT22) (BD Biosciences).
- Cells were analyzed on a Cyan ADP 9 flow cytometer (Beckman Coulter, Mississauga, Canada) and data was analyzed with FlowJo (Tree Star, Ashland, USA).
- Splenocytes were enriched for CD1 1 b using the EasySep CD1 1 b positive selection kit (StemCell Technologies, Vancouver, Canada).
- CD49+ cells were enriched using the EasySep CD49b positive selection kit (StemCell Technologies) from the CD1 1 b- fraction.
- CD1 1 b+ cells were stained with F4/80- PE-Cy5 (BM8, eBioscience) and GM -FITC (RB6-8C5, BD Biosciences) and further sorted with MoFlo Astrios (Beckman Coulter). Flow cytometry data was analyzed using Kaluza (Beckman Coulter). Isolated cells were infected with VSVA51 for 24 hours and clarified cell culture supernatants were applied to EMT6 cells for 24 hours in the presence of 5 ⁇ LCL1 61 . Bone marrow derived macrophages
- Excised tumors were fixed in 4% PFA, embedded in a 1 :1 mixture of OCT compound and 30% sucrose, and sectioned on a cryostat at 1 2 ⁇ . Sections were permeablized with 0.1 % Triton X-100 in blocking solution (50 mM Tris-HCI pH 7.4, 100 mM L-lysine, 145 mM NaCI and 1 % BSA, 1 0% goat serum), a-cleaved caspase 3 (C92-605, BD Pharmingen, Mississauga, Canada) and polyclonal antiserum VSV (Dr. Earl Brown, University of Ottawa, Canada) were incubated overnight followed by secondary incubation with AlexaFluor-coupled secondary antibodies (Invitrogen).
- Example 3 SMC-containing immunotherapies demonstrate anti-myeloma activity Immune checkpoint blockade synergizes with SMC treatment to delay disease progression in MM
- MPC-1 1 cells stably expressing a luciferase transgene were implanted via intravenous injection in to BALB/c mice.
- This in vivo MM model mimics the human disease well and follows predictable disease progression.
- MPC-1 1 cells are obtained from a murine plasmacytoma. Following two rounds of treatment with SMC and monoclonal antibodies against either PD-1 or CTLA-4, only anti-PD-1 based treatments showed response in terms of delayed disease progression.
- Type 1 interferons synergize with SMCs to cause MM cell death
- I FNa and I FN showed very strong synergistic killing of MM cells with SMC in most cell lines tested (FIG. 36A).
- mice were treated with recombinant I FNa and SMC at three different time points (FIG. 37).
- Oncolytic viruses synergize with SMCs to cause MM cell death
- SMC treatment effectively caused rapid degradation of clAP1 and clAP2 (FIG. 40A).
- SMC treatment increased NF- ⁇ signalling; beginning with a slight short-term boost in the classical pathway, as evidenced by a higher ratio of phosphorylated-p65 to p65, followed by prolonged reduction (FIG. 40B).
- the alternative N F- ⁇ pathway was very strongly activated, shown by an increased ratio of p52 to p1 00 (FIG. 40C).
- Apoptosis in the cells was confirmed by the presence of cleaved poly(ADP-ribose) polymerase (PARP). Cleavage of PARP is often used as an apoptotic marker because it is a substrate of caspases in early stages of apoptosis.
- PARP cleaved poly(ADP-ribose) polymerase
- Sensitivity to SMC in MM1 R and MM1S is related to glucocorticoid receptor expression
- MM 1 R and MM1 S Responsiveness to SMC-mediated cell death varies drastically between the related human MM cell lines MM 1 R and MM1 S, which are derived from the same parent line and differ only in expression of GCR.
- MM1 R which has no detectable expression of GCR (FIG. 39A)
- SMC FIG. 39C
- MM1 S which has high GCR expression
- MM 1 S can become sensitive to SMC treatments when treated with either Dex, or with a GCR antagonist RU486 (FIG. 39B).
- Innate immune stimulants upregulate inhibitors of the adaptive immune response
- FIGS. 44A and 44B are graphs showing data from an experiment in which double treated cured mice were re-injected with EMT6 cells in the mammary fatpad (1 80 days from the initial post-implantation date) or reinjected with CT-2A cells intracranially (1 90 days from the initial post-implantation date).
- FIG. 44C is a graph showing data from an experiment in which CT-2A glioma or EMT6 breast cancer cells were trypsinized, surface stained with conjugated isotype control IgG or anti-PD-L1 and processed for flow cytometry.
- FIG. 44A and 44B are graphs showing data from an experiment in which double treated cured mice were re-injected with EMT6 cells in the mammary fatpad (1 80 days from the initial post-implantation date) or reinjected with CT-2A cells intracranially (1 90 days from the initial post-implantation date).
- FIG. 44C is a graph showing data from an experiment in which CT-2A glioma or EMT6 breast cancer cells were trypsin
- 44D is a graph showing data from an experiment in which CD8+ T-cells were enriched from splenocytes (from naive mice or mice previously cured of EMT6 tumours) using a CD8 T- cell positive magnetic selection kit, and subjected to ELISpot assays for the detection of I FNy and Granzyme B.
- CD8+ T-cells were co-cultured with media or cancer cells (12:1 ratio of cancer cells to CD8+ T-cells) and 1 0 mg of control IgG or anti-PD-1 for 48 hr. Three mice were used as independent biological replicates (were previously cured of EMT6 tumors). 4T1 cells serve as a negative control as 4T1 and EMT6 cells carry the same major histocompatibility antigens.
- FIG. 45A is graph showing data in which EMT6 mammary tumor bearing mice were treated once with PBS or 1 x1 0 8 PFU VSVD51 intratumorally, and five days later, the mice were treated with combinations of vehicle or 50 mg/kg LCL1 61 (SMC) orally and 250 mg of anti-PD- intraperitoneally (i.p.).
- FIGS. 45B and 45C are graphs showing data in which mice bearing intracranial CT-2A or GL261 tumors were treated four times with vehicle or 75 mg/kg LCL1 61 (oral) and 250 mg (i.p.) of control IgG, anti-PD-1 or anti-CTLA-4.
- FIG. 45D is a graph showing data in which athymic CD-1 nude mice bearing CT-2A intracranial tumors were treated with 75 mg/kg LCL1 61 (oral) and 250 mg (i.p.) anti-PD-1 .
- Example 4 Smac mimetics synergize with immune checkpoint inhibitors to promote tumor immunity Cell culture
- MPC-1 1 was cultured in DM EM (Hyclone) with 10% FBS (Hyclone), U266 was cultured in RPMI-1 640 (Hyclone) with 15% FBS, all other lines were cultured in RPM I-1 640 with 1 0% FBS.
- NF1 -/+p53-/+ cells were derived from C57BI/6J p53+/-/NF1+/- mice. Cell lines were regularly tested for mycoplasma contamination. BTICs were cultured in serum-free culture medium supplemented with EGF and FGF- 250. For siRNA transfections, cells were reverse transfected with Lipofectamine RNAiMAX (Invitrogen) for 48 h as per the manufacturer's protocol. Cell lines were regularly tested for mycoplasma
- BTICs were cultured in serum-free culture medium supplemented with EGF and FGF-2.
- siRNA transfections cells were reverse transfected with Lipofectamine RNAiMAX (Invitrogen) for 48 h as per the manufacturer's protocol.
- LCL1 61 was a generous gift from Novartis.
- Anti-PD-1 (clone J43) was purchased from BioXcell.
- Poly(l :C) (HMW vaccigrade, Invivogen).
- I FNa (for in vivo use) was a generous gift from Dr Peter Staeheli in Germany.
- Tetralogic Pharmaceuticals provided Birinapant.
- I FNs were obtained from PBL assay science; Dexamethasone and RU486 were purchased from Sigma Aldrich.
- Antibodies used include RIAP1 (in house), PD-L1 (Abeam), PD-L2 (R&D Systems), GCR (Santa Cruz), P1 00 (Cell Signalling), P65 (cell signalling), p-P65 (cell signalling), IFNAR1 (Abeam), PARP (Cell Signalling), tubulin (Developmental Studies Hybridoma Bank), RI P1 (R&D Systems), capsase 8 (R&D Systems).
- AT-406, GDC-0917, and AZD-5582 were purchased from Active Biochem.
- TNF-a was purchased from Enzo.
- I FN- ⁇ was obtained from PBL Assay Science. Broad host range I FN-aB/D was produced in yeast and purified by affinity immunochromatography.
- Nontargeting siRNA or siRNA targeting cFLI P were obtained from Dharmacon (ON-TARGETplus SMARTpool).
- High molecular weight poly(l :C) was obtained from Invivogen.
- mice 4-5 week old BALB/c mice were purchased from Charles River and injected IV with 1 x1 0 6 M PC- 1 1 Flue cells stably expressing a firefly luciferase (Flue) transgene. Treatments include 50mg/kg LCL161 , 250 Mg anti-PD-1 , 250 Mg anti-CTLA4, 25Mg poly(l :C), 5x1 0 8 pfu VSVA51 , 1 ug I FNa. Imaging of mice was done with the in vivo imaging system I VIS, after I P injection of 200 ⁇ of luciferin to measure luminescence.
- I VIS in vivo imaging system
- VSV-EGFP, VSVA51 (lacking amino acid 51 in the M gene) and Maraba-MG1 were propagated in Vero cells and purified on an OptiPrep gradient.
- VSVA51 with the deletion of the gene encoding for glycoprotein (VSVA51 AG) was propagated in HEK293T-cells that were transfected with pM D2-G using Lipofectamine2000 (I nvitrogen), and purified on a sucrose cushion.
- NRRPs were generated by exposing VSV-EGFP to UV (250mJ cm-2) using a XL- 1000 UV crosslinker (Spectrolinker). In vitro viability assay
- Cell lines were seeded in 96-well plates and incubated overnight. Cells were treated with vehicle (0.05% DMSO) or LCL161 and infected with the indicated MOI of virus or treated with 1 ⁇ g ml_ "1 I FN- aB/D, 0.1 ng ml_ "1 TN F-a, or the indicated of NRRPs for 48 h. Cell viability was determined by Alamar blue (Resazurin sodium salt (Sigma)), and data were normalized to vehicle treatment. The chosen sample size is consistent with previous reports that used similar analyses for viability assays, but no statistical methods were used to determine sample size.
- AlexaFluor680 (Invitrogen) or I RDye800 (Li-Cor) (1 :2500) were used to detect the primary antibodies, and infrared fluorescent signals were detected using the Odyssey Infrared Imaging System (Li-Cor). Full-length blots are shown in FIGS. 68A-68D.
- mice were treated with 50 ⁇ g poly(l :C) intraperitoneally (i.p.) or 5x1 0 8 PFU of VSVA51 intravenously (i.v.). Brains were homogenized in 20 mM HEPES-KOH (pH 7.4), 150 mM NaCI, 10% glycerol and 1 mM MgCI2, supplemented with EDTA-free protease inhibitor cocktail (Roche). N P-40 was added to final concentration of 0.1 % and clarified through centrifugation. Equal amounts were processed for the detection of TNF-a with the TNF-a Quantikine assay kits (R&D Systems).
- mice cured of CT-2A tumors by SMC and anti-PD-1 treatment and age-matched control (nal ' ve) C57BL/6 female mice were injected subcutaneously with 1 x1 0 6 CT-2A cells. After seven days, splenocytes were isolated and cocultured with CT-2A cells for 48 hours (20:1 ratio of splenocytes to cancer cells) in the presence of vehicle or 5 ⁇ SMC or 20 Mg mL "1 of the indicated antibodies.
- the secretion of I FN- ⁇ , GrzB, TNF-a, IL-1 7, IL-6, and IL- 10 was determined by ELISA (kits are from R&D Systems).
- mice Female 5-week old C57BL/6 or CD-1 nude mice were anesthetized with isofluorane and the surgical site was shaved and prepared with 70% ethanol. 5x10 4 cells were stereotactically injected in a 10- ⁇ volume into the left striatum over 1 minute into the following coordinates: 0.5 mm anterior, 2 mm lateral from bregma, and 3.5 mm deep. The skin was closed using surgical glue.
- mice were treated with either vehicle (30% 0.1 M HCI, 70% 0.1 M NaOAc pH 4.63) or 75 mg kg-1 LCL161 orally and intratumorally (i.t.) in 1 0 ⁇ with 50 ⁇ g poly(l :C), intravenously (i.v.) with 5x10 8 VSVA51 or intraperitoneally (i.p.) with 250 Mg of anti-CD4 (GK1 .5), anti-CD8 (YTS1 69.4), anti-PD1 (J43), or CTLA-4 (9H 10).
- mice were treated with vehicle (12.5% Captisol) or 30 mg kg "1 birinapant (i.p.). In some cases, animals were treated with anti-IFNAR1 (MAR1 -5A3), anti-I FN- ⁇ (R4-6A2) or anti-TNF-a (XT3.1 1 ).
- Isotype control IgG antibodies were used as appropriately: BE0091 , BE0087, BP0090, MOPC-21 , or H PRN. All neutralizing and control antibodies were from BioXCell.
- mice were injected 1 0 ⁇ _ i.t.
- mice were treated orally with vehicle or 75 mg kg-1 LCL1 61 and 1 [ig I FN-a B/D (i.p.). Animals were euthanized when they showed predetermined signs of neurologic deficits (failure to ambulate, weight loss >20% body mass, lethargy, hunched posture). Treatment groups were assigned by cages and each group had 5 to 9 mice for statistical measures (Kaplan-Meier with log rank analysis). There was no randomization and the lead investigator was blinded to group allocation.
- sample size is consistent with previous reports that examined tumor growth and mouse survival following cancer treatment but no statistical methods were used to determine sample size.
- Live mouse brain MRI was performed at the University of Ottawa pre-clinical imaging core using a 7 Tesla GE/Agilent M R 901 . Mice were anaesthetized for the M RI procedure using isoflurane.
- the FSE sequence was performed in both transverse and coronal planes, for a total imaging time of about 5 minutes.
- Mammary tumors were established by injecting 1 x1 05 EMT6 cells in the mammary fat pad of 5- week old female BALB/c mice. Mice with palpable tumors ( ⁇ 1 00 mm3) were cotreated with either vehicle
- a mouse model of multiple myeloma and plasmacytoma was established by injecting 1 x1 0 6 luciferase-tagged MPC-1 1 cells (i.v.) into female 4-5 week old BALB/c mice. Mice were treated with vehicle (30% 0.1 M HCI, 70% 0.1 M NaOAc pH 4.63) or 75 mg kg-1 LCL1 61 orally and with 250 Mg of control IgG or a-PD-1 antibodies (i.p). Bioluminescence imaging was captured with a Xenogen2000 I VIS CCD-camera system (Caliper Life Sciences) following i.p. injection of 4 mg luciferin (Gold Biotechnology). Treatment groups were assigned by cages and each group had 3 to 4 mice for statistical measures (Kaplan-Meier with log rank analysis). There was no randomization and the lead investigator was blinded to group allocation.
- Nal ' ve age-matched female C57BL/6 mice or mice previously cured of intracranial CT-2A tumors by SMC-based combination treatment with immunostimulants were reinjected with CT-2A cells i.e. as described above or with 5x1 0 5 cells subcutaneously.
- Naive BALB/c or mice previously cured of luciferase-tagged EMT6 mammary tumors with SMC and VSVA51 combination treatment were reinjected with 5x1 0 5 untagged EMT6 cells in the fat pad. Animals were euthanized as described above. Blinding or randomization was not possible. All animal experiments were conducted with the approval of the University of Ottawa Animal Care and Veterinary Service in accordance with guidelines established by the Canadian Council on Animal Care.
- cells were treated with vehicle (0.01 % DMSO) or 5 ⁇ LCL1 61 and 0.01 % BSA, 1 ng mL-1 TN F-a, 250 U mL-1 I FN- ⁇ or 0.1 MOI of VSVA51 for 24 hr.
- Cells were released from plates with enzyme-free dissociation buffer (Gibco) and stained with Zombie Green and the indicated antibodies.
- enzyme-free dissociation buffer Gabco
- intracranial CT-2A tumors were mechanically dissociated, RBCs lysed in ACK lysis buffer and stained with Zombie Green and the indicated antibodies.
- cells were stimulated with 5 ng/ml PMA and 500 ng/ml lonomycin in the presence of Brefeldin A for 5 h, and intracellular antigens were processed using BD Cytofix/Cytoperm kit.
- Antibodies include Fc Block (1 0131 9, 1 :500), PD-L1 (1 0F.9G2, 1 :250), PD-L2 (TY25, 1 :1 00), l-A/l-E (M5/1 14.15.2, 1 :200) and H-2Kd/H-2Dd- (34-1 -2S, 1 :200), CD45 (30-F1 1 , 1 :300), CD3 (17A2, 1 :500), CD4 (GK1 .5, 1 :500), CD8 (53-6.7, 1 :500), PD-1 (29.1 A1 2, 1 :200), CD25 (PC61 , 1 :1 50), Gr1 (RB6-AC5, 1 :200), F4/80 (BM8, 1 :200), GrzB (GB1 1 , 1 :1 50) and I FN- ⁇ (XMG1 .2, 1 :200).
- TNF-a MP6-XT22, 1 :200
- CD1 1 b M 1 /70, 1 :1 00
- Cells were analyzed on a Cyan ADP 9 (Beckman Coulter) or BD Fortessa (BD Biosciences) and data was analyzed with FlowJo (Tree Star).
- Detection of mKate2-CT-2A cells was performed in an incubator outfitted with an Incucyte Zoom microscope equipped with a 1 0X objective. Enumeration of fluorescent signals from the Incucyte Zoom was processed using the integrated object counting algorithm within the Incucyte Zoom software. Multiplex ELISA
- CD8+ T-cells were enriched from splenocytes of female age-matched nal ' ve mice or mice previously cured of intracranial CT-2A (1 80 days post-implantation) or mammary EMT6 tumors (120 days post-implantation) using a CD8 magnetic selection kit (Stemcell Technologies).
- CD8+ cells were co- cultured with cancer cells (1 :20 for CT-2A, LLC, and 1 :1 2.5 for EMT6 or 4T1 cells) and with 1 0 ig mL-1 IgG (BE0091 ) or anti-PD-1 (J43) for 48 h using the IFN- ⁇ or Granzyme B ELISpot kits (R&D Systems).
- Example 5 Combining immunostimulatory agents for glioblastoma therapy
- N RRPs Non-replicating rhabdovirus particles
- VSVA51 is neurotoxic, and since issues remain about the 'immune privileged' brain microenvironment and penetration of drugs across the blood-brain barrier (BBB), we set out to test the effects of systemic and intracranial immunotherapy agent delivery.
- BBB blood-brain barrier
- SMCs have the capacity to reach tumors within the brain that have a compromised BBB.
- immunostimulatory agents such as the synthetic TLR3 agonist poly(l :C) injected intraperitoneally (i.p.) or the oncolytic virus VSVA51 administered intravenously (i.v.), induced the production of cytokine TN F-a in the serum and brain of non-tumor bearing mice.
- mice bearing intracranial CT-2A glioblastoma were treated singly with SMC (oral gavage), VSVA51 (i.v.)m or poly(l :C) (intracranially, i.e.), the extension of mouse survival was minimal for this aggressive cancer (1 7% survival rate) (FIG. 51 C).
- SMC oral gavage
- VSVA51 i.v.
- poly(l :C) intracranially, i.e.
- the combination of systemic SMC with an immunostimulatory trigger, VSVA51 or poly(l :C) significantly extended survival and resulted in durable cures for 71 % or 86% of the mice, respectively.
- Tumors (which were not tagged with a foreign protein to avoid enhanced immunity) were imaged at day 40 post-implantation by MRI to confirm the observed treatment outcomes.
- the innate immune system is a key player in the SMC-mediated death of tumor cells.
- mice previously cured of orthotopic EMT6 mammary carcinomas by combined SMC treatments were completely resistant to tumor engraftment when rechallenged with EMT6 cells (FIG. 52B).
- another syngeneic cell line, 4T1 that shares the major histocompatibility proteins, was not rejected from these cured mice.
- mice cured with intracranial CT-2A tumors were also resistant to tumor engraftment of CT-2A cells injected either subcutaneously or intracranially (FIG. 52C).
- FIG. 52C We next evaluated the cytotoxic potential of CD8 T-cells from cured mice via an ELISpot assay.
- SMCs There are two structural classes of SMCs: monomers and dimers. Monomeric SMCs consist of a single chemical molecule that binds to the BI R domains of the lAPs while dimeric SMCs consist of two SMC molecules connected by a linker allowing for cooperative binding and/or tethering of lAPs.
- a clinically advanced SMC, LCL161 is the focus of most of our studies, and is a potent monomer.
- Example 8 CD8+ T-cells are required for efficacy of SMCs and ICIs
- the immunosuppressive cytokine IL-1 0 had a general trend of decreased secretion with combined SMC and anti-PD-1 treatment.
- GrzB a cytotoxic factor that is partially blocked by XIAP31 - 33 and TNF-a
- SMCs we saw a statistically significant increase in the death of CT-2A cells in the presence of SMCs, and this response was increased with the inclusion of anti-PD-1 antibodies (FIG. 59C).
- Example 9 SMC treatment affects intratumoral immune cell infiltration
- M DSC myeloid-derived suppressor cells
- astrocytes/microglia In addition to the observed T-cell infiltration of intracranial glioblastoma tumors, we next characterized the presence of myeloid-derived suppressor cells (M DSC) and astrocytes/microglia. In contrast to a previous report, we did not detect differences in the M DSC population (CD1 1 b+ Gr1 +) in any treatment cohorts (FIG. 61 F). However we noted that the astrocyte/microglia population was significantly decreased in the treatment cohorts that included anti-PD-1 (FIG. 61 G). Overall, these results indicate that the consequence of combinatorial treatment is the decrease of an immunosuppressive CD4 T-cell population with a concomitant decrease of PD-1 presentation in T-cells and a reduction of astrocytes and/or microglia.
- Example 10 SMC synergy with ICIs is dependent on TNF-a
- FIGS. 62F and 63 Among these candidates from SMC or combined SMC and ICI treatment were the proinflammatory cytokines I FN- ⁇ , IL-1 ⁇ , IL-17, Osm, and TNF-a, the chemokines Ccl2 (also known as MCP-1 ), Ccl5, Ccl7, Ccl22, Cxcl9, CscM 0, and CxcM 1 , and multifaceted factors, such as FasL, IL-2, IL-1 2 and I FN- ⁇ .
- cytotoxic T-cells in response to SMC and anti-PD-1 treatment, may lead to enhanced tumor cell death due to the increased production of GrzB and TNF-a, pro-death factors that induce tumor cell death due to the antagonism of the lAPs.
- systemic blockade of TNF-a was applied, we observed almost a complete reversal of the efficacy of combined SMC and ICI treatment (FIG. 65C), highlighting the importance of TNF-a for the synergistic effect of these disparate agents.
- SMCs The immunomodulatory anti-cancer effects of SMCs are multimodal (FIGS. 66 and 67). SMCs can polarize macrophages away from the immunosuppressive M2 type towards the inflammatory TNF-a- producing M1 phenotype. Moreover, SMC anticancer effects are highly potentiated by proinflammatory cytokines, and the presence of these cytokines, such as TNF-a or TRAIL, within the tumor
- microenvironment leads to tumor cell death. Specifically, SMC mediated depletion of the clAPs converts the TNF-a-mediated survival response into a death pathway in cancer cells.
- SMC-mediated T-cell co-stimulatory signals provide the drive for adaptive immune responses that develop against the tumor and this is fully realized when the brakes imposed by co-inhibitory signals, such as PD-1 or PD-L1 , are removed with IC Is.
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EA201891904A EA201891904A1 (en) | 2016-02-24 | 2017-02-23 | SMC COMBINED THERAPY FOR THE TREATMENT OF MALIGNANT NUMER FORMATION |
KR1020187027746A KR20180120208A (en) | 2016-02-24 | 2017-02-23 | SMC Combination Therapy for Cancer |
TNP/2018/000294A TN2018000294A1 (en) | 2016-02-24 | 2017-02-23 | Smc combination therapy for the treatment of cancer |
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CN201780021033.6A CN108883187A (en) | 2016-02-24 | 2017-02-23 | SMC conjoint therapy use for cancer treatment |
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AU2022202181A1 (en) | 2022-04-21 |
TN2018000294A1 (en) | 2020-01-16 |
IL261171A (en) | 2018-10-31 |
KR20180120208A (en) | 2018-11-05 |
JP2019506438A (en) | 2019-03-07 |
EA201891904A1 (en) | 2019-04-30 |
US20210322545A1 (en) | 2021-10-21 |
IL291844B1 (en) | 2023-06-01 |
EP3419643A1 (en) | 2019-01-02 |
AU2017223233A1 (en) | 2018-08-30 |
IL291844A (en) | 2022-06-01 |
SG11201807003UA (en) | 2018-09-27 |
EP3419643A4 (en) | 2020-04-01 |
CL2018002408A1 (en) | 2019-01-18 |
PH12018501751A1 (en) | 2019-05-15 |
MX2018010202A (en) | 2019-06-06 |
IL291844B2 (en) | 2023-10-01 |
BR112018017195A2 (en) | 2019-01-02 |
CN108883187A (en) | 2018-11-23 |
CA3014504A1 (en) | 2017-08-31 |
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