Classifications

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  • A61K38/177—Receptors; Cell surface antigens; Cell surface determinants
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  • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
  • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
  • A61K47/62—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being a protein, peptide or polyamino acid
  • A61K47/64—Drug-peptide, drug-protein or drug-polyamino acid conjugates, i.e. the modifying agent being a peptide, protein or polyamino acid which is covalently bonded or complexed to a therapeutically active agent
• • A—HUMAN NECESSITIES
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  • A61K47/50—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates
  • A61K47/51—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent
  • A61K47/62—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being a protein, peptide or polyamino acid
  • A61K47/64—Drug-peptide, drug-protein or drug-polyamino acid conjugates, i.e. the modifying agent being a peptide, protein or polyamino acid which is covalently bonded or complexed to a therapeutically active agent
  • A61K47/643—Albumins, e.g. HSA, BSA, ovalbumin or a Keyhole Limpet Hemocyanin [KHL]
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• • A—HUMAN NECESSITIES
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  • A61P37/00—Drugs for immunological or allergic disorders
  • A61P37/02—Immunomodulators
  • A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
  • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
  • C07K16/24—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against cytokines, lymphokines or interferons
  • C07K16/241—Tumor Necrosis Factors
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  • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07K—PEPTIDES
  • C07K2317/00—Immunoglobulins specific features
  • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
  • C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding

Definitions

• the invention generally relates to the field of medicine. More particularly, it concerns compositions and methods involving nucleotide constructs and proteins - including engineered anti-inflammatory agents for targeting inflamed tissues.
• the EPR effect results from loose endothelial junctions allowing extravasation of macromolecules and nonfunctional lymphatics, resulting in prolonged retention of macromolecules within the solid tumors and inflamed tissues (11-15).
• inflammatory tissue has functional lymphatic system to excrete agents from there (14-16).
• the disclosure relates to the engineering of collagen-binding modification of anti inflammatory agents using collagen-binding peptide (CBP) and vWF A3 to achieve targeted therapy for inflammatory diseases.
• CBP collagen-binding peptide
• vWF A3 collagen-binding peptide
• embodiments of the disclosure relate to a composition comprising an anti-inflammatory agent operatively linked to an extracellular matrix (ECM)-affinity peptide.
• ECM extracellular matrix
• aspects of the disclosure also relate to an anti-inflammatory agent operatively linked to a serum protein and compositions containing an anti-inflammatory agent operatively linked to a serum protein.
• Further aspects of the disclosure relate to a method for treating an autoimmune or inflammatory condition in a subject comprising administering a composition of the disclosure to the subject.
• FIG. 1 Further aspects of the disclosure relate to a method for reducing inflammation in a subject comprising administering a composition comprising an anti-inflammatory agent operatively linked to an extracellular matrix (ECM)-affmity peptide to the subject.
• the inflammation is due to and autoimmune or inflammatory condition and wherein the autoimmune or inflammatory condition comprises inflammatory bowel disease, idiopathic pulmonary fibrosis, multiple sclerosis, type 1 diabetes, or arthritis.
• the anti-inflammatory agent operatively linked to an ECM- affmity peptide comprises a collagen binding domain conjugated to anti-TNFa. In some embodiments, the anti-inflammatory agent operatively linked to an ECM-affmity peptide comprises vWF-A3 operatively linked to IL-4. In some embodiments, the anti-inflammatory agent operatively linked to an ECM-affmity peptide comprises a collagen binding domain conjugated to anti-TGF-b. In some embodiments, the composition is administered systemically. In some embodiments, the composition is administered locally. In some embodiments, the administered dose of the anti-inflammatory agent operatively linked to the ECM-affmity peptide is at least 20% less than the minimum effective dose of the anti inflammatory agent administered locally without the peptide.
• the anti-inflammatory agent comprises an anti-inflammatory antibody.
• the anti-inflammatory antibody comprises an antibody that is specific for TNF-a, IL-1, IL-5, IL-6, IL-6R, IL-12, IL-17A, IL-18, IFN-g, GM-CSF, CD3, CD20, VLA-4, VLA-5, VCAM-1, TGF-bI, ow-integrin, or ⁇ 7-integrin, connective tissue growth factor, platelet-derived growth factor, plasminogen activator inhibitor- 1, or insulin-like growth factor-binding protein.
• the antibody is an anti-TNF-a, anti-IL-1, anti- IL-5, anti-IL-6, anti-IL-6R, anti-IL-12, anti-IL-17A, anti-IL-18, anti-IFN-g, anti-GM-CSF, anti-CD3, anti-CD20, anti-VLA-4, anti-VLA-5, anti-VCAM-1, anti-TGF-bI, anti-ow-integrin, anti-or ⁇ 7-integrin, anti -connective tissue growth factor, anti -platelet-derived growth factor, anti-plasminogen activator inhibitor- 1, or anti-insulin-like growth factor-binding protein antibody.
• the anti-inflammatory antibody is a blocking antibody.
• the anti-inflammatory antibody is a neutralizing antibody.
• the anti-inflammatory antibody is an antagonistic antibody. One or more of these antibodies may be specifically excluded from an embodiment.
• the anti-inflammatory agent comprises an antigen-binding fragment of anti-TNF-a, anti-IL-1, anti-IL-5, anti-IL-6, anti-IL-6R, anti-IL-12, anti-IL-17A, anti-IL-18, anti-IFN-g, anti-GM-CSF, anti-CD3, anti-CD20, anti-VLA-4, anti-VLA-5, anti- VCAM-1, anti-TGF-bI, anti-ou-integrin, anti-a ⁇ -integrin, anti-connective tissue growth factor, anti-platelet-derived growth factor, anti-plasminogen activator inhibitor- 1, or anti- insulin-like growth factor-binding protein antibody.
• the antigen binding fragment may comprise a variable light chain region comprising CDR1, CDR2, and CDR3 from an anti-TNF- a, anti-IL-1, anti-IL-5, anti-IL-6, anti-IL-6R, anti-IL-12, anti-IL-17A, anti-IL-18, anti-IFN-g, anti-GM-CSF, anti-CD3, anti-CD20, anti-VLA-4, anti-VLA-5, anti-VCAM-1, anti-TGF-bI, anti-ow-integrin, anti-or ⁇ 7-integrin, anti-connective tissue growth factor, anti-platelet-derived growth factor, anti-plasminogen activator inhibitor- 1, or anti-insulin-like growth factor binding protein antibody and/or a variable heavy chain region comprising CDR1, CDR2, and CDR3 from an anti-TNF-a, anti-IL-1, anti-IL-5, anti-IL-6, anti-IL-6R, anti-IL-12, anti-IL-17A, anti-IL-18, anti-IFN-g, anti-GM-
• the antibody comprises adalimumab, certolizumab, infliximab, golimumab, tocilizumab, rituximab, ustekinumab, natalizumab, vedolizumab, secukinumab, or ixekizumab.
• the anti-inflammatory agent comprises an antigen binding fragment derived from adalimumab, certolizumab, infliximab, golimumab, tocilizumab, rituximab, ustekinumab, natalizumab, vedolizumab, secukinumab, or ixekizumab.
• the antigen binding fragment may comprise a variable light chain region comprising CDR1, CDR2, and CDR3 from adalimumab, certolizumab, infliximab, golimumab, tocilizumab, rituximab, ustekinumab, natalizumab, vedolizumab, secukinumab, or ixekizumab and/or a variable heavy chain region comprising CDR1, CDR2, and CDR3 from adalimumab, certolizumab, infliximab, golimumab, tocilizumab, rituximab, ustekinumab, natalizumab, vedolizumab, secukinumab, or ixekizumab.
• antigen binding fragments derived from whole antibodies include minibodies, scFv, chimeric antigen receptors, and diabodies.
• the antibody is humanized.
• the antibody is a chimeric antibody.
• One or more of these antibodies or antigen binding fragments may be specifically excluded
• the antibody comprises an anti-TNF-a antibody. In some embodiments, the antibody comprises an anti-IL-1 antibody. In some embodiments, the antibody comprises an anti-IL-5 antibody. In some embodiments, the antibody comprises an anti-IL-6 antibody. In some embodiments, the antibody comprises an anti-IL-6R antibody. In some embodiments, the antibody comprises an anti-IL-12 antibody. In some embodiments, the antibody comprises an anti-IL-17A antibody. In some embodiments, the antibody comprises an anti-IL-18 antibody. In some embodiments, the antibody comprises an anti-IFN-g antibody. In some embodiments, the antibody comprises an anti-GM-CSF antibody. In some embodiments, the antibody comprises an anti-CD3 antibody. In some embodiments, the antibody comprises an anti-CD20 antibody.
• the antibody comprises an anti-VLA-4 antibody. In some embodiments, the antibody comprises an anti-VLA-5 antibody. In some embodiments, the antibody comprises an anti-VCAM-1 antibody. In some embodiments, the antibody comprises an anti-TGF-bI antibody. In some embodiments, the antibody comprises an anti-ow-integrin antibody. In some embodiments, the antibody comprises an anti -aib -integrin antibody. In some embodiments, the antibody comprises an anti-connective tissue growth factor antibody. In some embodiments, the antibody comprises an anti -platelet-derived growth factor antibody. In some embodiments, the antibody comprises an anti -plasminogen activator inhibitor- 1 antibody. In some embodiments, the antibody comprises an anti-insulin-like growth factor-binding protein antibody.
• the anti-inflammatory agent comprises an anti-inflammatory cytokine polypeptide.
• the cytokine polypeptide comprises a polypeptide from IL-4, IL-lra, IL-5, IL-10, IL-11, IL-23, IL-35, IL-36ra, IL-37, interferon-b, TGF-bI, TNF receptor I, and TNF receptor II.
• the cytokine polypeptide derived from a mouse, dog, horse, pig, or goat cytokine polypeptide.
• the cytokine polypeptide comprises an effector region from one or more of IL- 4, IL-lra, IL-5, IL-10, IL-11, IL-23, IL-35, IL-36ra, IL-37, interferon-b, TGF-bI, TNF receptor I, and TNF receptor II.
• the cytokine polypeptide comprises a polypeptide from IL-4.
• the cytokine polypeptide comprises a polypeptide from IL-lra.
• the cytokine polypeptide comprises a polypeptide from IL-5. In some embodiments, the cytokine polypeptide comprises a polypeptide from IL-10. In some embodiments, the cytokine polypeptide comprises a polypeptide from IL-11. In some embodiments, the cytokine polypeptide comprises a polypeptide from IL-23, IL-35. In some embodiments, the cytokine polypeptide comprises a polypeptide from IL-36ra. In some embodiments, the cytokine polypeptide comprises a polypeptide from IL-37. In some embodiments, the cytokine polypeptide comprises a polypeptide from interferon-b.
• the cytokine polypeptide comprises a polypeptide from TGF-bI . In some embodiments, the cytokine polypeptide comprises a polypeptide from TNF receptor I. In some embodiments, the cytokine polypeptide comprises a polypeptide from TNF receptor II. One or more of these anti-inflammatory polypeptides may be specifically excluded from an embodiment. In some embodiments, the cytokine polypeptide is a human cytokine polypeptide or derived from a human cytokine polypeptide.
• the cytokine polypeptide comprises a polypeptide of SEQ ID NO: 18-44 or a fragment thereof or a polypeptide with at least 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80. 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% sequence identity (or any derivable range therein) to a polypeptide having an amino acid sequence of one of SEQ ID NO: 18-44 or a fragment thereof.
• the anti-inflammatory agent comprises a polypeptide of SEQ ID NO:58 or 59, or fragments thereof or a polypeptide with at least 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80. 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% sequence identity (or any derivable range therein) to a polypeptide having an amino acid sequence of one of SEQ ID NO:58 or 59, or a fragment thereof.
• the anti-inflammatory agent comprises a polypeptide from CD200.
• the CD200 polypeptide comprises the extracellular domain of CD200.
• CD200 (UniProt identifier 054901) is a type-I transmembrane protein that can exert immunosuppressive functions through interaction with its receptor, CD200R1. When cleaved from the surface of the cell, the soluble extracellular domain of CD200 can still bind to and activate CD200R.
• Embodiments of the disclosure relate to polypeptides comprising at least or at most the extracellular portion of CD200 and a serum protein, such as serum albumin. The polypeptides are useful in the method embodiments of the disclosure.
• a polypeptide comprising at least or at most the extracellular portion of CD200, serum albumin, and an ECM-affmity polypeptide.
• the ECM-affmity peptide comprises a collagen binding domain.
• the polypeptide comprises a collagen binding domain from decorin or von Willebrand factor (VWF).
• the ECM-affmity peptide comprises a peptide from placenta growth factor-2 (P1GF-2) or CXCL- 12g
• the ECM-affmity peptide comprises a peptide that is at least 85% identical to one of SEQ ID NOS: 1-17, 47, or 52 or a peptide that is at least 85% identical to a fragment of one of SEQ ID NOS: 1-17, 47, or 52.
• the ECM-affmity peptide comprises a peptide that has at least 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80.
• the anti-inflammatory agent operatively linked to an extracellular matrix (ECM)-affmity peptide further comprises a serum protein operatively linked to the peptide or agent.
• the serum protein is operatively linked to the peptide.
• the serum protein is operatively linked to the peptide through a peptide bond.
• the serum protein comprises albumin.
• the anti-inflammatory agent is amino-proximal to the serum protein.
• the anti-inflammatory agent is carboxy-proximal to the serum protein.
• the ECM-affmity peptide is amino-proximal to the anti-inflammatory agent.
• the ECM-affmity peptide is carboxy-proximal to the anti-inflammatory agent.
• the serum protein is amino-proximal to the ECM-affmity peptide. In some embodiments, the serum protein is carboxy-proximal to the ECM-affmity peptide.
• a first region is carboxy-proximal to a second region when the first region is attached to the carboxy terminus of the second region.
• the regions need not be immediately adjacent, unless specifically specified as not having intervening amino acid residues.
• amino-proximal is similarly defined in that a first region is amino-proximal to a second region when the first region is attached to the amino terminus of the second region.
• the composition comprises a collagen binding domain amino-amino proximal to a serum albumin protein, and an IL-10 polypeptide carboxy proximal to the serum albumin protein.
• the peptide is covalently linked to the anti-inflammatory agent and/or other molecules, such as a serum protein.
• the peptide is crosslinked to the anti-inflammatory agent through a bifunctional linker.
• Linkers such as amino acid or peptidomimetic sequences may be inserted between the peptide and/or antibody sequence.
• a fynomer domain is joined to a Heavy (H) chain or Light (L) chain immediately after the last amino acid at the amino(NH2)-terminus or the carboxy(C)- terminus of the Heavy (H) chain or the Light (L) chain.
• Linkers may have one or more properties that include a flexible conformation, an inability to form an ordered secondary structure or a hydrophobic or charged character which could promote or interact with either domain.
• Examples of amino acids typically found in flexible protein regions may include Gly, Asn and Ser.
• Other near neutral amino acids, such as Thr and Ala may also be used in the linker sequence.
• the length of the linker sequence may vary without significantly affecting the function or activity of the fusion protein (see, e.g., U.S. Pat. No.
• linkers may also include chemical moieties and conjugating agents, such as sulfo-succinimidyl derivatives (sulfo-SMCC, sulfo- SMPB), disuccinimidyl suberate (DSS), disuccinimidyl glutarate (DSG) and disuccinimidyl tartrate (DST).
• the linker can be a dipeptide linker, such as a valine-citrulline (val-cit), a phenylalanine-lysine (phe-lys) linker, or maleimidocapronic-valine-citruline-p-aminobenzyloxycarbonyl (vc) linker.
• the linker is sulfosuccinimidyl-4-[N-maleimidomethyl]cyclohexane-l- carboxylate (smcc).
• Sulfo-smcc conjugation occurs via a maleimide group which reacts with sulfhydryls (thiols,— SH), while its sulfo-NHS ester is reactive toward primary amines (as found in lysine and the protein or peptide N-terminus).
• the linker may be maleimidocaproyl (me).
• the peptide is linked to the anti-inflammatory agent through a peptide bond.
• the peptide may be linked to the amino or carboxy terminus of the anti-inflammatory agent.
• the peptide is linked to the heavy chain of an anti-inflammatory antibody.
• the peptide is linked to the light chain of an anti-inflammatory antibody.
• the ratio of peptide to the anti- inflammatory agent is about 1 : 1 to 5 : 1. In some embodiments, the ratio of peptide to the anti inflammatory agent is about 1 : 1, 2: 1, 3 : 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, 9: 1, 10: 1, 11 : 1, 12: 1, 13 : 1, 14: 1, 15: 1, 16: 1, 17: 1, 18: 1, 19: 1, or 20: 1 (or any derivable range therein). One or more of these linkers may be specifically excluded from an embodiment.
• the composition further comprises a second anti inflammatory agent operatively linked to an extracellular matrix (ECM)-affmity peptide. In some embodiments, the composition further comprises a third, fourth, fifth, or sixth anti inflammatory agent operatively linked to an extracellular matrix (ECM)-affmity peptide.
• ECM extracellular matrix
• the autoimmune or inflammatory condition comprises inflammatory bowel disease, idiopathic pulmonary fibrosis, multiple sclerosis, type 1 diabetes, Crohn’s disease, psoriasis, acute inflammation, chronic inflammation, neuroinflammation, arthritis, rheumatoid arthritis, fibrosis, infection, allergy, inflammatory therapy-related adverse events, and -related inflammatory illness.
• inflammatory bowel disease idiopathic pulmonary fibrosis, multiple sclerosis, type 1 diabetes, Crohn’s disease
• psoriasis psoriasis
• acute inflammation chronic inflammation
• neuroinflammation arthritis
• rheumatoid arthritis fibrosis
• infection allergy
• inflammatory therapy-related adverse events e.g., inflammatory therapy-related adverse events, and -related inflammatory illness.
• the composition is administered systemically. In some embodiments, the composition is administered by intravenous injection. In some embodiments, the composition is administered locally. In some embodiments, the composition is administered to or adjacent to a site of inflammation.
• the administered dose of the composition comprising the anti-inflammatory agent operatively linked to the peptide is less than the minimum effective dose of the anti-inflammatory agent administered without the peptide. In some embodiments, the administered dose of the composition comprising the anti-inflammatory agent operatively linked to the peptide is less than the minimum effective dose of the anti-inflammatory agent administered without the peptide by the same route of administration. In some embodiments, the administered dose of the anti-inflammatory agent operatively linked to the peptide is at least 10% less than the minimum effective dose of the anti-inflammatory agent administered without the peptide.
• the administered dose of the anti-inflammatory agent operatively linked to the peptide is at least 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, or 70% less (or any range derivable therein) than the minimum effective dose of the anti inflammatory agent administered without the peptide.
• the subject has been previously treated with an anti inflammatory agent, anti-inflammatory therapy, or autoimmune therapy. In some embodiments, the subject has been determined to be non-responsive to the previous treatment. In some embodiments, the subject has not been treated previously for the inflammatory or autoimmune disease. In some embodiments, the method further comprises administration of an additional inflammatory or autoimmune therapy. In some embodiments, the method further comprises administration of a second anti-inflammatory agent operatively linked to an extracellular matrix (ECM)-affmity peptide.
• ECM extracellular matrix
• cytokine polypeptide refers to a polypeptide, which is cytokine or a receptor binding domain thereof and retains at a portion of cytokine activity.
• the terms“subject,”“mammal,” and“patient” are used interchangeably.
• the subject is a mammal.
• the subject is a human.
• the subject is a mouse, rat, rabbit, dog, donkey, or a laboratory test animal such as fruit fly, zebrafish, etc.
• the terms “or” and “and/or” are utilized to describe multiple components in combination or exclusive of one another.
• “x, y, and/or z” can refer to“x” alone,“y” alone,“z” alone,“x, y, and z,”“(x and y) or z,”“x or (y and z),” or“x or y or z.” Is is specifically contemplated that x, y, or z may be specifically excluded from an embodiment.
• any limitation discussed with respect to one embodiment of the invention may apply to any other embodiment of the invention.
• any composition of the invention may be used in any method of the invention, and any method of the invention may be used to produce or to utilize any composition of the invention.
• Aspects of an embodiment set forth in the Examples are also embodiments that may be implemented in the context of embodiments discussed elsewhere in a different Example or elsewhere in the application, such as in the Summary of Invention, Detailed Description of the Embodiments, Claims, and description of Figure Legends.
• FIG. 1A-B CBP-conjugation provided collagen affinity to aTNF.
• A WT-aTNF and CBP-aTNF analyzed by MALDI-TOF MS. Abscissa is mass to charge ratio (m/z) and ordinate is intensity of doubly charged ions.
• FIG 2A-D CBP-aTNF accumulated in the inflamed paw.
• Arthritis CAIA
• Cy7 labeled CBP-aTNF and Cy7 labeled WT-aTNF were intravenously injected into naive and CAIA mice. Representative images of accumulation in arthritic or non-arthritic paws of mice injected with CBP-aTNF (A) and WT-aTNF (B).
• D Representative histology images of joints in CBP-aTNF-injected CAIA mouse (left, H&E staining; right, immunohistochemistry staining against anti-rat IgG).
• FIG. 3A-B CBP-aTNF suppressed arthritis development more effectively than WT-aTNF.
• Arthritis was induced by passive immunization of anti-collagen antibodies, followed by intraperitoneal injection of LPS. On the day of LPS injection, control IgG, WT- aTNF, or CBP-aTNF was injected intravenously into the arthritis mice.
• Arthritis scores represent the mean + SE from six mice. * P ⁇ 0.05, compared with control (Dunnett’s multiple comparison test). # P ⁇ 0.05, compared with the scores on day 8 of each treatment group (Tukey’s multiple comparison test).
• B Representative H&E image of joints on day 8 in each treatment group. The severity of synovial hyperplasia and bone resorption was scored 0 to 4 as described in Materials and Method. Statistical analysis was performed using the Dunnett’s multiple comparison test for the difference between control and the aTNF treatment groups.
• FIG. 4A-B Subcutaneous injection of CBP-aTNF also accumulated in the arthritic paw and suppressed arthritis development.
• Arthritis was induced selectively in right hind paw by passive immunization of anti-collagen antibodies, followed by subcutaneous injection of LPS at right hind footpad and PBS at left hind footpad.
• Cy7 labeled CBP-aTNF was subcutaneously injected at the back of the mouse. Representative images of accumulation in arthritic or non-arthritic paws of mice injected with CBP-aTNF (indicated by arrows).
• FIG. 5A-B Effect of local injection on arthritis development. Arthritis was induced by passive immunization of anti-collagen antibodies, followed by intraperitoneal injection of LPS. On the day of LPS injection, (A) Cy7 labeled PlGF-2i23-i44-aTNF and Cy7 labeled WT- aTNF or (B) control IgG, WT-aTNF, and PlGF-2i23-i44-aTNF were injected subcutaneously into left hind paw of the arthritis mice. (A) Representative images of retention in the injected site of mice with WT-aTNF and PlGF-2i23-i44-aTNF. (B) Arthritis scores represent the mean ⁇ SE from eight mice. # P ⁇ 0.05, compared with the scores on day 6 of each group (Tukey’s multiple comparison test).
• Dy Light 800-labeled A3-IL4, A3 protein (C) or Cy7 labeled CBP- aTNF (D) was intravenously injected into naive or EAE mice. Spinal cord was harvested 4 hours after the injection and fluorescent intensity was measured.
• FIG. 7A-C Localization of A3 protein and CBP-conjugate in inflamed tissues of other inflammatory disease models.
• DyLight 800-labeled A3 protein, or Cy7 labeled CBP- aTNF was intravenously injected into IL- 10 /_ x TLR-4 (DKO) mice that spontaneously developed or non-developed IBD, or normal (C57BL/6) mice. Colon was harvested 4 hours after the injection, and was provided for fluorescent imaging (upper) and histological analyses (lower). Colon of IBD-developed mouse injected Cy7 labeled CBP-aTNF was stained with H&E and periodic acid-Schiff (PAS).
• the injected antibody was detected by immunohistochemistry (IHC) against anti-rat IgG.
• Cy7 labeled CBP-aTGF or Cy7 labeled aTGF was intravenously injected into naive mice or bleomycin-induced pulmonary fibrosis model 7 days after the bleomycin instillation. Lung was harvested 4 hours after the fluorescence injection, then fluorescent intensity was measured.
• C Dy Light 800-labeled A3 protein was intravenously injected into type I diabetes (T1D) spontaneously developed mouse, cyclophosphamide-induced T1D mouse, and non-diabetic mouse. Pancreas was harvested 15 minutes after the fluorescence injection, then fluorescent intensity was measured.
• FIG. 8A-D Albumin fusion to IL-10 provided FcRn binding and resulted in LN accumulation.
• A SDS-PAGE analysis for wt IL-10 and SA-IL-10.
• B Binding analysis of SA-IL-10 to FcRn.
• C Splenocytes (i) or single cells from the popliteal LN (ii) were incubated with SA, SA-IL-10 or CBD-SA-IL-10 for 30 min on ice. Shown in (i) for each cell type (x axis) is, from left to right, a bar representing the % binding (y-axis) for SA, SA-IL-10, and CBD-SA-IL-10.
• FIG. 9A-B Albumin fusion to IL-10 provided prolonged blood circulation, and CBD fusion improved biodistribution to the inflamed joint.
• AUC Area under curve
• ANOVA analysis of variance
• FIG. 10A-D Albumin-fused IL-10 suppressed arthritis development more effectively than wt IL-10.
• A Arthritis (CAIA) was induced by passive immunization with anti-collagen antibodies, followed by intraperitoneal injection of LPS. On the day of LPS injection, PBS, wt IL-10, SA-IL-10 or CBD-SA-IL-10 (equivalent to 43.5 pg of IL-10) was injected intravenously into the arthritic mice. Arthritis scores represent the mean + SEM from 7 mice.
• FIG. 11A-D Albumin-fused IL-10 showed improved therapeutic effect on established arthritis.
• DBA/1J male mice were subcutaneously injected with bovine collagen/CFA emulsion in the tail base. After three weeks, bovine collagen/IFA emulsion was further injected as a boost.
• arthritis scores become 2-4 (defined as Day 0) mice were intravenously injected with PBS, SA-IL-10, or CBD-SA-IL-10 (each equivalent to 43.5 pg of IL-10), or with 200 pg of anti-TNF-a antibody.
• the same treatments were additionally injected to the mice on Day 3.
• a and B Arthritis scores represent the mean + SEM from 9 mice.
• FIG. 12A-F Albumin-fused IL-10 accumulated within and suppressed Thl7 activation in LNs.
• Arthritis (CAIA) was induced by passive immunization of anti-collagen antibodies, followed by intraperitoneal injection of LPS (defined as Day 3). On the day LPS injection, wt IL-10, SA-IL-10 or CBD-SA-IL-10 were intravenously injected into the arthritic mice. IL-10 levels and Thl7-relating cytokines in LNs were measured using ELISA.
• A Comparison of IL-10 levels 4 hr after injection of each protein.
• (B) Pharmacokinetics of wt IL- 10 or SA-IL-10 in LNs after intravenous injection (mean ⁇ SEM; n 4)
• (F) GM-CSF levels in the popliteal LN. (mean ⁇ SEM; n 7)
• Statistical analyses were done using analysis of variance (ANOVA) with Tukey’s test. *P ⁇ 0.05; **P ⁇ 0.01; ***P ⁇ 0.001; ****P ⁇ 0.0001; ns; not significant.
• FIG. 13A-C Albumin-fused IL-10 suppressed inflammatory responses within the paws.
• Arthritis (CAIA) was induced by passive immunization of anti-collagen antibodies, followed by intraperitoneal injection of LPS. On the day of LPS injection (defined as Day 3), PBS, wt IL-10, SA-IL-10 or CBD- SA-IL-10 were intravenously injected into the arthritic mice.
• A Single cells were extracted from the hind paws on day 11, followed by flow cytometric analysis.
• FIG. 14A-B CBD-conjugation provided collagen affinity to IL-10.
• A SDS-PAGE analysis for CBD-SA-IL-10.
• B Binding analysis of CBD-SA-IL-10 to type I or type III collagens and FcRn.
• FIG. 15A-B Effect of albumin-fused IL-10 on immune cell populations in the spleen (A) and LNs (B).
• Arthritis (CAIA) was induced by passive immunization of anti collagen antibodies, followed by intraperitoneal injection of LPS (defined as Day 3).
• LPS Long Term Evolution
• PBS wt IL-10
• SA-IL-10 were intravenously injected to mice. Single cells were extracted from the spleen and the popliteal LN on the day following the last injection, followed by flow cytometric analysis.
• Statistical analyses were done using analysis of variance (ANOVA) with Tukey’s test except for the following graphs.
• FIG. 16A-B Effect of albumin-fused IL-10 on T cell populations in paws and blood.
• Arthritis (CAIA) was induced by passive immunization of anti-collagen antibodies, followed by intraperitoneal injection of LPS (defined as Day 3). On the day of LPS injection, PBS, wt IL-10, SA-IL-10 or CBD-SA-IL-10 were intravenously injected to mice.
• A Single cells were extracted from the hind paws on day 11, followed by flow cytometric analysis.
• Lymphocytes were extracted from blood on day 11, followed by flow cytometric analysis.
• Graphs depict the frequency of CD3 + T cells within CD45 + lymphocytes, CD3 + CD4 + T cells within CD45 + lymphocytes, Treg (Foxp3 + CD25 + ) of CD3 + CD4 + T cells, CD3 + CD8 + T cells within CD45 + lymphocytes (mean ⁇ SEM; n 5-7)
• Statistical analyses were done using analysis of variance (ANOVA) with Tukey’s test except for the following graphs: for analysis of %NK1.1 + within CD45 + cells, %Foxp3 + within CD4 + cells, %CD44 + /CD62L- within CD8 + cells, %CD44 + /CD62L + within CD8 + cells and %PD-1 + within CD8 + cells in (A), Kruskal-Wallis test followed by Dunn’s multiple comparison test was employed.
• FIG. 17A-B Safety assessments of albumin-fused IL-10. wt IL-10, SA-IL-10, or CBD-SA-IL-10 were intravenously injected to healthy BALB/c mice.
• A Two days after injection, white blood cell counts, red blood cell counts, platelet counts, the concentration of hemoglobin in blood and the weight of spleen were assessed.
• Wt IL-4 and SA-IL-4 were analyzed by SDS-PAGE under reducing and non-reducing conditions with Coomassie blue staining
• b SA-IL-4 binding to freshly isolated immune cells from LN and spleen, measured by flow cytometry
• Wt IL-4 and SA-IL-4 activity assay Phosphorylation of STAT6 in the T cells was analyzed by flow cytometry after culturing T cells in vitro with indicated concentrations of wt IL-4 or SA-IL-4.
• FIG. 19A-H SA fusion to IL-4 increased the amount of IL-4 in the secondary lymphoid organs after intravenous injection
• T cells and high endothelial venules were respectively stained by anti-CD3 or anti-PNAd antibodies. Scale bars represent (g) 200 pm and (h) 100 pm. Data are mean ⁇ SEM. Two experimental replicates. Statistical analyses were performed using one-way ANOVA with Tukey’s test. **P ⁇ 0.01.
• PBS phosphate-buffered saline
• Myelin expression was detected by immunohistochemistry with anti-myelin basic protein antibody (brown). Arrows indicate demyelination.
• Graph represents % of mice showing demyelination in each treatment group by blinded pathology analysis. Two experimental replicates. Data are mean ⁇ SEM. Statistical analyses were performed using one-way ANOVA with Tukey’s test. **P ⁇ 0.01.
• FIG. 21A-H SA-IL-4 treatment inhibits leukocyte infiltration to the spinal cord and induces immune suppressive cells in the draining LN.
• Mice were injected with wt IL-4, SA- IL-4, or PBS i.p. or SA-IL-4 s.c. every other day for 10 days from day 8 after immunization, or FTY720 1 mg/kg body weight was administered orally every day from day 8 after immunization.
• FIG. 22A-P SA-IL-4 treatment activates the PD-1/PD-L1 axis and decreases integrin and cytokine expression in T cells.
• MOG35-55-induced EAE mice were injected with PBS, wt IL-4 or SA-IL-4 s.c. on days 8, 10 and 12 after immunization.
• the spinal cord and spleen were isolated on day 13 and (a-i) immune cells were analyzed. Frequencies of (a) Tetramer + (recognizing MOG35-55) cells within CD4 + T cells in the spinal cord.
• aEb2 integrin + cells within Tetramer + CD4 + T cells (b) aEb2 integrin + cells within Tetramer + CD4 + T cells, (c) a4b1 integrin + cells within Tetramer + CD4 + T cells, (d) aEb2 integrin + cells within CD8 + T cells, and (e) a4b1 integrin + cells within CD8 + T cells, are shown (f) Mean fluorescence intensity (MFI) of PD-1 of central memory (CM) CD44 + CD62L + CD4 + T cells, (g) MFI of PD-1 of CM CD44 + CD62L + CD8 + T cells, (h) MFI of PD-L1 of Ly6C + Ly6G CDl lb + M-MDSC, (i) frequency of PD-L L of Ly6C + Ly6G CDl lb + M-MDSC, (j) MFI of PD-L1 of Ly6C + Ly6G + CDl l
• Cytokine expression within CD4 + T cells was characterized by flow cytometry. Data are mean ⁇ SEM. The experiment was performed once. Statistical analyses were performed using one-way ANOVA with Tukey’s test. *P ⁇ 0.05, **P ⁇ 0.01.
• FIG. 23A-K SA-IL-4 treatment in the chronic phase of EAE decreases the clinical score and prevents immune cell infiltration to the spinal cord.
• EAE was induced in C57BL/6 mice using MOG35-55.
• c-d PBS, wt IL-4 or SA-IL-4 was injected s.c.
• Graphs represent frequencies of (e) CD45+ cells within live cells in spinal cord, (f) CD4 + CD3 + CD45 + T cells within live cells in spinal cord, (g) Tetramer + (recognizing MOG35-55) RoRyt + CD4 + Thl7 cells within live cells in spinal cord, (h) IL-23R + cells within Tetramer + CD4 + cells in spleen (i-j) Splenocytes were cultured in vitro in the presence of MOG protein for 3 days (i) IL-17A, (j) GM-CSF concentrations in the culture media were analyzed by ELISA (k) Splenocytes were cultured in vitro in the presence of MOG35-55 peptide for 6 h.
• Cytokine expression within CD4 + T cells was characterized by flow cytometry. The experiment was performed once. Data are mean ⁇ SEM. Statistical analyses were performed using one-way ANOVA with Tukey’s test. *P ⁇ 0.05, **P ⁇ 0.01.
• FIG. 25A-B SA(P573K) mutation to SA-IL-4 decreases blood concentration and abolished FcRn binding.
• Mice were injected with 40 pg of wt IL-4, SA-IL-4, or SA(P573K)- IL-4 i.v.. After 1 hr, blood was collected and IL-4 concentration in the plasma was determined by ELISA. Data are mean ⁇ SEM.
• FIG. 27 FcRn binding is crucial for SA-IL-4 to suppresses EAE disease development and progression.
• Disease progression in C57BL/6 MOG35-55 EAE mice injected i.p. every other day from day 8 after immunization with PBS or SA-IL-4 (10 pg on an IL-4 basis) (n 6).
• Data are mean ⁇ SEM. Two experimental replicates.
• Statistical analyses were performed using Student’s t-test. **P ⁇ 0.01.
• FIG. 28A-B SA-IL-4 did not affect the number of macrophages and dendritic cells in the spinal cord and draining LN.
• Mice were injected with wt IL-4, SA-IL-4, or PBS i.p. or SA-IL-4 s.c. every other day for 10 days from day 8 after immunization.
• FTY720 1 mg/kg body weight was administered orally every day from day 8 after immunization.
• 17 days after immunization cells from the draining LN (dLN) and spinal cord were isolated and analyzed by flow cytometry.
• FIG. 29A-0 Blood and organ analysis of SA-IL-4 revealed SA-IL-4 is safe. Toxicity analysis of SA-IL-4. 10 pg of wt IL-4 or equimolar SA-IL-4 was injected i.v. to naive mice. After 2 days, (a-i) serum was tested using a biochemistry analyzer and (j-m) blood was tested using a hematology analyzer. Lung water content was determined by weighing the lungs before and after lyophilization. Data are mean ⁇ SEM. The experiment was performed once. Statistical analyses were performed using one-way ANOVA with Tukey’s test.
• FIG. 30A-D Gating strategy for flow cytometry.
• A Re-stimulation (cytokine expression).
• B Integrin expression.
• C MDSCs.
• D CD45 + and T cells.
• Enhancing therapeutic efficacy of drugs for inflammatory and autoimmune diseases is of huge demand.
• One possible approach is that targeting anti-inflammatory drugs to inflamed area. Collagens are not accessible in most tissues due to the low permeability of the vasculature, yet are exposed to the bloodstream in the inflamed area due to the hyperpermeability of the vasculature.
• This disclosure describes ECM-binding anti-inflammatory agents conjugated to ECM-affmity peptides.
• One such peptide is a collagen-binding peptide (CBP).
• CBP- conjugation provided collagen affinity to anti-TNFa antibody (aTNF).
• aTNF anti-TNFa antibody
• CBP-aTNF accumulated in inflamed areas of the collagen antibody-induced arthritis model (Example 1).
• antibody refers to an intact immunoglobulin of any isotype, or a fragment thereof that can compete with the intact antibody for specific binding to the target antigen, and includes chimeric, humanized, fully human, and bispecific antibodies.
• antibody or“immunoglobulin” are used interchangeably and refer to any of several classes of structurally related proteins that function as part of the immune response of an animal, including IgG, IgD, IgE, IgA, IgM, and related proteins, as well as polypeptides comprising antibody CDR domains that retain antigen-binding activity.
• antigen refers to a molecule or a portion of a molecule capable of being bound by a selective binding agent, such as an antibody.
• An antigen may possess one or more epitopes that are capable of interacting with different antibodies.
• epitope includes any region or portion of molecule capable eliciting an immune response by binding to an immunoglobulin or to a T-cell receptor.
• Epitope determinants may include chemically active surface groups such as amino acids, sugar side chains, phosphoryl or sulfonyl groups, and may have specific three-dimensional structural characteristics and/or specific charge characteristics.
• antibodies specific for a particular target antigen will preferentially recognize an epitope on the target antigen within a complex mixture.
• epitope regions of a given polypeptide can be identified using many different epitope mapping techniques are well known in the art, including: x-ray crystallography, nuclear magnetic resonance spectroscopy, site-directed mutagenesis mapping, protein display arrays, see, e.g., Epitope Mapping Protocols, (Johan Rockb erg and Johan Nilvebrant , Ed., 2018) Humana Press, New York, N.Y. Such techniques are known in the art and described in, e.g., U.S. Pat. No. 4,708,871; Geysen et al. Proc. Natl. Acad. Sci. USA 81 :3998-4002 (1984); Geysen et al.
• antigenic regions of proteins can also be predicted and identified using standard antigenicity and hydropathy plots.
• an intact antibody is generally composed of two full-length heavy chains and two full-length light chains, but in some instances may include fewer chains, such as antibodies naturally occurring in camelids that may comprise only heavy chains.
• Antibodies as disclosed herein may be derived solely from a single source or may be“chimeric,” that is, different portions of the antibody may be derived from two different antibodies.
• the variable or CDR regions may be derived from a rat or murine source, while the constant region is derived from a different animal source, such as a human.
• the antibodies or binding fragments may be produced in hybridomas, by recombinant DNA techniques, or by enzymatic or chemical cleavage of intact antibodies.
• the term“antibody” includes derivatives, variants, fragments, and muteins thereof, examples of which are described below (Sela-Culang et al. Front Immunol. 2013; 4: 302; 2013)
• the term“light chain” includes a full-length light chain and fragments thereof having sufficient variable region sequence to confer binding specificity.
• a full-length light chain has a molecular weight of around 25,000 Daltons and includes a variable region domain (abbreviated herein as VL), and a constant region domain (abbreviated herein as CL).
• VL variable region domain
• CL constant region domain
• VL fragment means a fragment of the light chain of a monoclonal antibody that includes all or part of the light chain variable region, including CDRs.
• a VL fragment can further include light chain constant region sequences.
• the variable region domain of the light chain is at the amino-terminus of the polypeptide.
• the term“heavy chain” includes a full-length heavy chain and fragments thereof having sufficient variable region sequence to confer binding specificity.
• a full-length heavy chain has a molecular weight of around 50,000 Daltons and includes a variable region domain (abbreviated herein as VH), and three constant region domains (abbreviated herein as CHI, CH2, and CH3).
• VH variable region domain
• CHI constant region domain
• CH2 constant region domains
• VH fragment means a fragment of the heavy chain of a monoclonal antibody that includes all or part of the heavy chain variable region, including CDRs.
• a VH fragment can further include heavy chain constant region sequences. The number of heavy chain constant region domains will depend on the isotype.
• the VH domain is at the amino- terminus of the polypeptide, and the CH domains are at the carboxy-terminus, with the CH3 being closest to the— COOH end.
• the isotype of an antibody can be IgM, IgD, IgG, IgA, or IgE and is defined by the heavy chains present of which there are five classifications: mu (m), delta (d), gamma (g), alpha (a), or epsilon (e) chains, respectively.
• IgG has several subtypes, including, but not limited to, IgGl, IgG2, IgG3, and IgG4.
• IgM subtypes include IgMl and IgM2.
• IgA subtypes include IgAl and IgA2.
• Antibodies can be whole immunoglobulins of any isotype or classification, chimeric antibodies, or hybrid antibodies with specificity to two or more antigens. They may also be fragments (e.g., F(ab')2, Fab', Fab, Fv, and the like), including hybrid fragments.
• An immunoglobulin also includes natural, synthetic, or genetically engineered proteins that act like an antibody by binding to specific antigens to form a complex.
• the term antibody includes genetically engineered or otherwise modified forms of immunoglobulins, such as the following:
• the term“monomer” means an antibody containing only one Ig unit. Monomers are the basic functional units of antibodies.
• the term“dimer” means an antibody containing two Ig units attached to one another via constant domains of the antibody heavy chains (the Fc, or fragment crystallizable, region). The complex may be stabilized by a joining (J) chain protein.
• the term“multimer” means an antibody containing more than two Ig units attached to one another via constant domains of the antibody heavy chains (the Fc region). The complex may be stabilized by a joining (J) chain protein.
• bivalent antibody means an antibody that comprises two antigen-binding sites.
• the two binding sites may have the same antigen specificities or they may be bi-specific, meaning the two antigen-binding sites have different antigen specificities.
• Bispecific antibodies are a class of antibodies that have two paratopes with different binding sites for two or more distinct epitopes.
• bispecific antibodies can be biparatopic, wherein a bispecific antibody may specifically recognize a different epitope from the same antigen.
• bispecific antibodies can be constructed from a pair of different single domain antibodies termed“nanobodies”. Single domain antibodies are sourced and modified from cartilaginous fish and camelids. Nanobodies can be joined together by a linker using techniques typical to a person skilled in the art; such methods for selection and joining of nanobodies are described in PCT Publication No. WO2015044386A1, No. WO2010037838 A2, and Bever et al., Anal Chem. 86:7875-7882 (2014), each of which are specifically incorporated herein by reference in their entirety.
• Bispecific antibodies can be constructed as: a whole IgG, Fab '2, Fab 'PEG, a diabody, or alternatively as scFv. Diabodies and scFvs can be constructed without an Fc region, using only variable domains, potentially reducing the effects of anti-idiotypic reaction. Bispecific antibodies may be produced by a variety of methods including, but not limited to, fusion of hybridomas or linking of Fab' fragments. See, e.g., Songsivilai and Lachmann, Clin. Exp. Immunol. 79:315-321 (1990); Kostelny et al., J. Immunol. 148: 1547-1553 (1992), each of which are specifically incorporated by reference in their entirety.
• the antigen-binding domain may be multispecific or heterospecific by multimerizing with VH and VL region pairs that bind a different antigen.
• the antibody may bind to, or interact with, (a) a cell surface antigen, (b) an Fc receptor on the surface of an effector cell, or (c) at least one other component.
• aspects may include, but are not limited to, bispecific, trispecific, tetraspecific, and other multispecific antibodies or antigen-binding fragments thereof that are directed to epitopes and to other targets, such as Fc receptors on effector cells.
• multispecific antibodies can be used and directly linked via a short flexible polypeptide chain, using routine methods known in the art.
• diabodies that are bivalent, bispecific antibodies in which the VH and VL domains are expressed on a single polypeptide chain, and utilize a linker that is too short to allow for pairing between domains on the same chain, thereby forcing the domains to pair with complementary domains of another chain creating two antigen binding sites.
• the linker functionality is applicable for embodiments of triabodies, tetrabodies, and higher order antibody multimers. (see, e.g., Hollinger et al., Proc Natl. Acad. Sci. USA 90:6444-6448 (1993); Polijak et al., Structure 2: 1121-1123 (1994); Todorovska et al., J. Immunol. Methods 248:47-66 (2001)).
• Bispecific diabodies as opposed to bispecific whole antibodies, may also be advantageous because they can be readily constructed and expressed in E. coli.
• Diabodies (and other polypeptides such as antibody fragments) of appropriate binding specificities can be readily selected using phage display (WO94/13804) from libraries. If one arm of the diabody is kept constant, for instance, with a specificity directed against a protein, then a library can be made where the other arm is varied and an antibody of appropriate specificity selected.
• Bispecific whole antibodies may be made by alternative engineering methods as described in Ridgeway et al., (Protein Eng., 9:616-621, 1996) and Krah et al., (N Biotechnol. 39: 167-173, 2017), each of which is hereby incorporated by reference in their entirety.
• Heteroconjugate antibodies are composed of two covalently linked monoclonal antibodies with different specificities. See, e.g., US Patent No. 6,010,902, incorporated herein by reference in its entirety.
• the part of the Fv fragment of an antibody molecule that binds with high specificity to the epitope of the antigen is referred to herein as the“paratope.”
• the paratope consists of the amino acid residues that make contact with the epitope of an antigen to facilitate antigen recognition.
• Each of the two Fv fragments of an antibody is composed of the two variable domains, VH and VL, in dimerized configuration.
• the primary structure of each of the variable domains includes three hypervariable loops separated by, and flanked by, Framework Regions (FR).
• the hypervariable loops are the regions of highest primary sequences variability among the antibody molecules from any mammal.
• hypervariable loop is sometimes used interchangeably with the term“Complementarity Determining Region (CDR).”
• CDR Complementarity Determining Region
• the length of the hypervariable loops (or CDRs) varies between antibody molecules.
• the framework regions of all antibody molecules from a given mammal have high primary sequence similarity/consensus.
• the consensus of framework regions can be used by one skilled in the art to identify both the framework regions and the hypervariable loops (or CDRs) which are interspersed among the framework regions.
• the hypervariable loops are given identifying names which distinguish their position within the polypeptide, and on which domain they occur.
• CDRs in the VL domain are identified as LI, L2, and L3, with LI occurring at the most distal end and L3 occurring closest to the CL domain.
• the CDRs may also be given the names CDR-1, CDR-2, and CDR-3.
• the L3 (CDR-3) is generally the region of highest variability among all antibody molecules produced by a given organism.
• the CDRs are regions of the polypeptide chain arranged linearly in the primary structure, and separated from each other by Framework Regions.
• the amino terminal (N-terminal) end of the VL chain is named FR1.
• the region identified as FR2 occurs between LI and L2 hypervariable loops.
• FR3 occurs between L2 and L3 hypervariable loops, and the FR4 region is closest to the CL domain. This structure and nomenclature is repeated for the VH chain, which includes three CDRs identified as HI, H2 and H3.
• the majority of amino acid residues in the variable domains, or Fv fragments are part of the framework regions (approximately 85%).
• the three dimensional, or tertiary, structure of an antibody molecule is such that the framework regions are more internal to the molecule and provide the majority of the structure, with the CDRs on the external surface of the molecule.
• Several methods have been developed and can be used by one skilled in the art to identify the exact amino acids that constitute each of these regions. This can be done using any of a number of multiple sequence alignment methods and algorithms, which identify the conserved amino acid residues that make up the framework regions, therefore identifying the CDRs that may vary in length but are located between framework regions.
• affinity matured antibodies are enhanced with one or more modifications in one or more CDRs thereof that result in an improvement in the affinity of the antibody for a target antigen as compared to a parent antibody that does not possess those alteration(s).
• Certain affinity matured antibodies will have nanomolar or picomolar affinities for the target antigen.
• Affinity matured antibodies are produced by procedures known in the art, e.g., Marks et al., Bio/Technology 10:779 (1992) describes affinity maturation by VH and VL domain shuffling, random mutagenesis of CDR and/or framework residues employed in phage display is described by Rajpal et al., PNAS. 24: 8466-8471 (2005) and Thie et al., Methods Mol Biol. 525:309-22 (2009) in conjugation with computation methods as demonstrated in Tiller et al., Front. Immunol. 8:986 (2017).
• Chimeric immunoglobulins are the products of fused genes derived from different species; “humanized” chimeras generally have the framework region (FR) from human immunoglobulins and one or more CDRs are from a non-human source.
• FR framework region
• portions of the heavy and/or light chain are identical or homologous to corresponding sequences from another particular species or belonging to a particular antibody class or subclass, while the remainder of the chain(s) is identical or homologous to corresponding sequences in antibodies derived from another species or belonging to another antibody class or subclass, as well as fragments of such antibodies, so long as they exhibit the desired biological activity.
• For methods relating to chimeric antibodies see, e.g., U.S. Pat. No. 4,816,567; and Morrison et al., Proc. Natl.
• CDR grafting is described, for example, in U.S. Pat. Nos. 6,180,370, 5,693,762, 5,693,761, 5,585,089, and 5,530, 101, which are all hereby incorporated by reference for all purposes.
• minimizing the antibody polypeptide sequence from the non human species optimizes chimeric antibody function and reduces immunogenicity.
• Specific amino acid residues from non-antigen recognizing regions of the non-human antibody are modified to be homologous to corresponding residues in a human antibody or isotype.
• One example is the“CDR-grafted” antibody, in which an antibody comprises one or more CDRs from a particular species or belonging to a specific antibody class or subclass, while the remainder of the antibody chain(s) is identical or homologous to a corresponding sequence in antibodies derived from another species or belonging to another antibody class or subclass.
• the V region composed of CDR1, CDR2, and partial CDR3 for both the light and heavy chain variance region from a non-human immunoglobulin are grafted with a human antibody framework region, replacing the naturally occurring antigen receptors of the human antibody with the non-human CDRs.
• corresponding non-human residues replace framework region residues of the human immunoglobulin.
• humanized antibodies may comprise residues that are not found in the recipient antibody or in the donor antibody to further refine performance.
• the humanized antibody may also comprise at least a portion of an immunoglobulin constant region (Fc), typically that of a human immunoglobulin.
• Fc immunoglobulin constant region
• Intrabodies are intracellularly localized immunoglobulins that bind to intracellular antigens as opposed to secreted antibodies, which bind antigens in the extracellular space.
• Polyclonal antibody preparations typically include different antibodies against different determinants (epitopes).
• a host such as a rabbit or goat
• the antigen or antigen fragment generally with an adjuvant and, if necessary, coupled to a carrier.
• Antibodies to the antigen are subsequently collected from the sera of the host.
• the polyclonal antibody can be affinity purified against the antigen rendering it monospecific.
• Monoclonal antibodies or“mAh” refer to an antibody obtained from a population of homogeneous antibodies from an exclusive parental cell, e.g., the population is identical except for naturally occurring mutations that may be present in minor amounts. Each monoclonal antibody is directed against a single antigenic determinant.
• antibody fragments such as antibody fragments that bind to and/or neutralize inflammatory mediators.
• the term functional antibody fragment includes antigen-binding fragments of an antibody that retain the ability to specifically bind to an antigen. These fragments are constituted of various arrangements of the variable region heavy chain (VH) and/or light chain (VL); and in some embodiments, include constant region heavy chain 1 (CHI) and light chain (CL). In some embodiments, they lack the Fc region constituted of heavy chain 2 (CH2) and 3 (CH3) domains.
• Embodiments of antigen binding fragments and the modifications thereof may include: (i) the Fab fragment type constituted with the VL, VH, CL, and CHI domains; (ii) the Fd fragment type constituted with the VH and CHI domains; (iii) the Fv fragment type constituted with the VH and VL domains; (iv) the single domain fragment type, dAb, (Ward, 1989; McCafferty et al., 1990; Holt et al., 2003) constituted with a single VH or VL domain; (v) isolated complementarity determining region (CDR) regions.
• CDR complementarity determining region
• Antigen-binding fragments also include fragments of an antibody that retain exactly, at least, or at most 1, 2, or 3 complementarity determining regions (CDRs) from a light chain variable region. Fusions of CDR-containing sequences to an Fc region (or a CH2 or CH3 region thereof) are included within the scope of this definition including, for example, scFv fused, directly or indirectly, to an Fc region are included herein.
• CDRs complementarity determining regions
• Fab fragment means a monovalent antigen-binding fragment of an antibody containing the VL, VH, CL and CHI domains.
• Fab' fragment means a monovalent antigen-binding fragment of a monoclonal antibody that is larger than a Fab fragment.
• a Fab' fragment includes the VL, VH, CL and CHI domains and all or part of the hinge region.
• F(ab')2 fragment means a bivalent antigen-binding fragment of a monoclonal antibody comprising two Fab' fragments linked by a disulfide bridge at the hinge region.
• An F(ab')2 fragment includes, for example, all or part of the two VH and VL domains, and can further include all or part of the two CL and CHI domains.
• Fd fragment means a fragment of the heavy chain of a monoclonal antibody, which includes all or part of the VH, including the CDRs.
• An Fd fragment can further include CHI region sequences.
• Fv fragment means a monovalent antigen-binding fragment of a monoclonal antibody, including all or part of the VL and VH, and absent of the CL and CHI domains.
• the VL and VH include, for example, the CDRs.
• Single-chain antibodies are Fv molecules in which the VL and VH regions have been connected by a flexible linker to form a single polypeptide chain, which forms an antigen-binding fragment. Single chain antibodies are discussed in detail in International Patent Application Publication No. WO 88/01649 and U.S. Pat. Nos. 4,946,778 and 5,260,203, the disclosures of which are herein incorporated by reference.
• (scFv)2 means bivalent or bispecific sFv polypeptide chains that include oligomerization domains at their C-termini, separated from the sFv by a hinge region (Pack et al. 1992).
• the oligomerization domain comprises self-associating a- helices, e.g., leucine zippers, which can be further stabilized by additional disulfide bonds.
• (scFv)2 fragments are also known as“miniantibodies” or“minibodies.”
• a single domain antibody is an antigen-binding fragment containing only a VH or the VL domain.
• two or more VH regions are covalently joined with a peptide linker to create a bivalent domain antibody.
• the two VH regions of a bivalent domain antibody may target the same or different antigens.
• An Fc region contains two heavy chain fragments comprising the CH2 and CH3 domains of an antibody.
• the two heavy chain fragments are held together by two or more disulfide bonds and by hydrophobic interactions of the CH3 domains.
• the term “Fc polypeptide” as used herein includes native and mutein forms of polypeptides derived from the
• Truncated forms of such polypeptides containing the hinge region that promotes dimerization are included.
• Antigen-binding peptide scaffolds such as complementarity-determining regions (CDRs) are used to generate protein-binding molecules in accordance with the embodiments.
• CDRs complementarity-determining regions
• a person skilled in the art can determine the type of protein scaffold on which to graft at least one of the CDRs. It is known that scaffolds, optimally, must meet a number of criteria such as: good phylogenetic conservation; known three-dimensional structure; small size; few or no post-transcriptional modifications; and/or be easy to produce, express, and purify. Skerra, J Mol Recognit, 13 : 167-87 (2000).
• the protein scaffolds can be sourced from, but not limited to: fibronectin type III FN3 domain (known as“monobodies”), fibronectin type III domain 10, lipocalin, anticalin, Z- domain of protein A of Staphylococcus aureus, thioredoxin A or proteins with a repeated motif such as the “ankyrin repeat”, the “armadillo repeat”, the “leucine-rich repeat” and the “tetratricopeptide repeat”.
• Such proteins are described in US Patent Publication Nos. 2010/0285564, 2006/0058510, 2006/0088908, 2005/0106660, and PCT Publication No. W02006/056464, each of which are specifically incorporated herein by reference in their entirety. Scaffolds derived from toxins from scorpions, insects, plants, mollusks, etc., and the protein inhibiters of neuronal NO synthase (PIN) may also be used.
• PIN neuronal NO synthase
• Cytokines are a group of proteins that cells release upon excitation (only very few cytokines are expressed on cell membranes). Cytokines produced by cells can affect target cells nearby or through blood circulation at very low concentration. They have broad functions on promoting growth, differentiation, and activation of target cells. Many cytokines can target immune cells and play a role in immune response. Based on structural and functional differences, cytokines may be broadly divided into chemokines, interleukins, growth factors, transforming growth factors, colony stimulating factors, tumor necrosis factors, and interferons.
• cytokines may be used as anti-inflammatory agents in methods and compositions of the disclosure. While exemplary sequences are provided below, equivalent or homologous proteins known in the art may also be used.
• VL SGALCFRMKD S ALKVL YLHNNQLL AGGLHAEK VIKGEEIS VVPNRALD
• ASL SP VI LGVQGGSQCLSCGTEKGPILKLEPVNIMELYLGAKESKSFTFYRRDMGLTSSFESAAY
• PGWFLCTSPEADQPVRLTQIPEDPAWDAPITDFYFQQCD SEQ ID NO:35.
• Embodiments of the disclosure relate to polypeptides and compositions comprising the anti-inflammatory agent, CD200.
• Exemplary CD200 polypeptide amino acid sequences are shown below:
• Mouse CD200 extracellular domain is represented by the following sequence: Q VE V VT QDERK ALHTT ASLRC SLKT S QEPLI VT W QKKK A V SPENM VT Y SKTHGV VI QP AYKDRINVTELGLWN S SITFWNTTLEDEGCYMCLFNTF GSQKVSGT ACLTL YVQP IVHLHYNYFEDHLNITCSATARPAPAISWKGTGTGIENSTESHFHSNGTTSVTSILRVK DPKT Q V GKE VIC QVL YLGN VID YKQ SLDKG (SEQ ID NO: 58).
• Mouse CD200-MSA fusion protein (linker is underlined): Q VE V VT QDERK ALHTT ASLRC SLKT S QEPLI VTW QKKK A V SPENM VTY SKTHGV VI QP AYKDRINVTELGLWN S SITFWNTTLEDEGCYMCLFNTF GSQKVSGT ACLTL YVQP IVHLHYNYFEDHLNITCSATARPAPAISWKGTGTGIENSTESHFHSNGTTSVTSILRVK DPKT O V GKE VIC OVL YLGN VID YKQ SLDKGGGGS GGGSE AHK SEI AHRYNDLGEOH FKGLVLIAF SQYLQKC S YDEHAKL VQEVTDF AKTC VADES AANCDKSLHTLFGDKL CAIPNLRENYGELADCCTKQEPERNECFLQHKDDNPSLPPFERPEAEAMCTSFKENPT TFMGHYLHEVARRHPYFYAPELLYYA
• Human CD200 extracellular domain (UniProt identifier P41217) is represented by the following sequence: QVQVVTQDEREQLYTPASLKCSLQNAQEALIVTWQKKKAVSPENMVTFSENHGVVI QP AYKDKINITQLGLQNSTITFWNITLEDEGCYMCLFNTF GF GKISGT ACLTVYVQPIV SLHYKFSEDHLNITCSATARPAPMVFWKVPRSGIENSTVTLSHPNGTTSVTSILHIKDP KNQVGKEVICQVLHLGTVTDFKQTVNKG (SEQ ID NO:59).
• An exemplary Human CD200 (lower case) -human serum albumin (upper case) fusion protein (linker is uppercase and underlined) is represented by the following: qvqvvtqdereqlytpaslkcslqnaqealivtwqkkkavspenmvtfsenhgvviqpaykdkinitqlglqnstitfwnitlede gcymclfntfgfgkisgtacltvyvqpivslhykfsedhlnitcsatarpapmvfwkvprsgienstvtlshpngttsvtsilhikdp knqvgkevicqvlhlgtvtdfkqtvnkgGGGSGGGSDAHKSEVAHRFKDLGEENFKALVLIAFAQ
• Mouse CD200 (lower case)-CBD fusion protein (upper case) is represented by the following: qvevvtqderkalhttaslrcslktsqeplivtwqkkkavspenmvtyskthgvviqpaykdrinvtelglwnssitfwnttledeg cymclfntfgsqkvsgtacltlyvqpivhlhynyfedhlnitcsatarpapaiswkgtgtgiensteshfhsngttsvtsilrvkdpkt qvgkevicqvlylgnvidykqsldkgGGGSGGGSCSQPLDVILLLDGSSSFPASYFDEMKSFAKAF ISK ANIGPRLT Q V S VLQ Y GSITTID VPWNVVPEKAHLL SLVD VMQREGGP S
• Human CD200 (lower case)-CBD fusion protein (upper case) (linker is uppercase and underlined) is represented by the following: qvqvvtqdereqlytpaslkcslqnaqealivtwqkkkavspenmvtfsenhgvviqpaykdkinitqlglqnstitfwnitlede gcymclfntfgfgkisgtacltvyvqpivslhykfsedhlnitcsatarpapmvfwkvprsgienstvtlshpngttsvtsilhikdp knqvgkevicqvlhlgtvtdfkqtvnkgGGGSGGGSCSQPLDVILLLDGSSSFPASYFDEMKSFAKA FISKANIGPRLTQVSVLQYGSITTIDVPWNVVPEKAHLLSLVDVMQREGGPSQ
• Mouse CD200 (uppercase)-mouse serum albumin (lowercase)-CBD (italic underline uppercase) fusion protein is represented by the following (linkers are uppercase and underlined):
• RILAGPAGDSNWKLORIEDLPTMVTLGNSFLHKLCSGFVRI SEP ID NO: 64.
• Human CD200 (uppercase)-human serum albumin (lowercase)-CBD (italic underline uppercase) fusion protein is represented by the following (linkers are uppercase and underlined):
• Collagen is an extracellular matrix (ECM)-protein that regulates a variety of cellular biological functions, such as proliferation, differentiation, and adhesion in both normal and tumor tissue (Ricard-Blum, Cold Spring Harb Perspect Biol 3 :a004978, 2011). Collagen is the most abundant protein in the mammalian body and exists in almost all tissues in one or more of 28 isoforms (Ricard-Blum, Cold Spring Harb Perspect Biol 3 :a004978, 2011). The blood vessel sub-endothelial space is rich in collagen.
• ECM extracellular matrix
• von Willebrand factor is a blood coagulation factor and binds to both type I and type III collagen, and the adhesion receptor GPIb on blood platelets (Lenting et al., Journal of thrombosis and haemostasis :JTH 10:2428-37, 2012; Shahidi Advances in experimental medicine and biology 906:285-306, 2017). When injured, collagen beneath endothelial cells is exposed to blood plasma, and vWF-collagen binding initiates the thrombosis cascade (Shahidi Advances in experimental medicine and biology 906:285-306, 2017; Wu et al. Blood 99:3623- 28, 2002).
• the vWF A domain has the highest affinity against collagen among reported non- bacterial origin proteins/peptides (Addi et al., Tissue Engineering Part B: Reviews, 2016). Particularly within the A domain, the A3 domain of vWF has been reported as a collagen binding domain (CBD) (Ribba et al. Thrombosis and Haemostasis 86:848-54, 2001). As described above, the inventors contemplated that a fusion protein with the vWF A3 CBD may achieve targeted cytokine immunotherapy even when injected systemically due to exposure of collagen via the leaky tumor vasculature. [0134] In some embodiments, the ECM-affmity peptide comprises a collagen binding domain from decorin.
• the ECM-affmity peptide comprises a decorin peptide such as LRELHLNNNC (SEQ ID NO: l), which is derived from bovine or LRELHLDNNC (SEQ ID NO: 2), which is derived from human.
• LRELHLNNNC SEQ ID NO: l
• LRELHLDNNC SEQ ID NO: 2
• the ECM-peptide comprises a peptide fragment from human decorin, which is represented by the following amino acid sequence: CGPFQQRGLFDFMLEDEASGIGPEVPDDRDFEPSLGPVCPFRCQCHLRVVQCSDLGL DK VPKDLPPD TTLLDLQNNKITEIKD GDFKNLKNLHALIL VNNKI SK V SPGAF TPL VK LERL YL SKN QLKELPEKMPKTLQELRAHENEITK VRK VTFN GLN QMI VIELGTNPLK S SGIENGAFQGMKKLSYIRIADTNITSIPQGLPPSLTELHLDGNKISRVDAASLKGLNNL AKLGLSFNSISAVDNGSLANTPHLRELHLDNNKLTRVPGGLAEHKYIQVVYLHNNNI S V V GS SDF CPPGHNTKK A SYS GV SLF SNP V Q YWEIQP S TFRC V YVRS AIQLGNY
• the ECM-peptide comprises a peptide fragment from vWF.
• the ECM-peptide comprises vWF A1 derived from human sequence, residues 1237-1458 (474-695 of mature VWF) or a fragment thereof, which is represented by the amino acid sequence
• the ECM-peptide comprises all or a fragment of vWF A3, which is represented by the following amino acid sequences:
• the ECM-peptide comprises all or a fragment of vWF A3, which is represented by the following amino acid sequences: CSQPLDVVLLLDGSSSLPESSFDKMKSFAKAFISKANIGPHLTQVSVIQYGSINTIDVP WNVVQEKAHLQSLVDLMQQEGGPSQIGDALAFAVRYVTSQIHGARPGASKAVVIII MDTSLDPVDTAADAARSNRVAVFPVGVGDRYDEAQLRILAGPGASSNVVKLQQVE DLSTMATLGNSFFHKLCSGFSGV (SEQ ID NO:52).
• the ECM-affmity peptide is a peptide from von Willebrand factor (vWF).
• the sequence of human vWF comprises the following: MIP ARE AGVLLAL ALILPGTLC AEGTRGRS STARC SLFGSDF VNTFDGSMYSF AGYC S YLLAGGCQKRSF SIIGDF QNGKRV SLS VYLGEFFDIHLF VNGT VTQGDQRV SMPYAS KGLYLETEAGYYKLSGEAYGFVARIDGSGNFQVLLSDRYFNKTCGLCGNFNIFAEDD FMT QEGTLT SDP YDF AN S W AL S S GEQ W CERASPP S S S CNI S SGEMQKGL WEQC QLL K S T S VF ARCHPL VDPEPF V ALCEKTLCECAGGLECACP ALLEY ART C AQEGM VL Y G WTDHSACSPVCPAGMEYRQCVSPCARTCQ
• the peptide is from the vWF A3 domain.
• the vWF A3 domain is derived from the human sequence, residues 1670-1874 (907-1111 of mature vWF) and has the following sequence:
• CSGEGLQIPTLSPAPDC SQPLD VILLLDGS S SFP AS YFDEMKSF AKAFISKANIGPRLTQ VSVLQYGSITTIDVPWNVVPEKAHLLSLVDVMQREGGPSQIGDALGFAVRYLTSEMH GARPGASK AVVIL VTD V S VD SVDAAADAARSNRVT VFPIGIGDR D AAQLRIL AGP A GD SNVVKLQRIEDLPTMVTLGN SFLHKLC SG (SEQ ID NO:7).
• the ECM-affmity peptide comprises a peptide from P1GF-2.
• P1GF-2 has the following sequence:
• Exemplary P1GF-2 ECM affinity peptides include: RRRPKGRGKRRREKQRPTDCHLCGDAVPRR (SEQ ID NO: 9);
• RRRPKGRGKRRREKQRPTDCHL SEQ ID NO: 10
• RRPKGRGKRRREKQRPTD SEQ ID NO: 11
• RRRPKGRGKRRREKQ SEQ ID NO: 12
• GKRRREKQ SEQ ID NO: 13
• RRRPKGRG SEQ ID NO: 14
• RRKTKGKRKRSRNSQTEEPHP SEQ ID NO: 15
• the ECM-affmity peptide is a peptide from CXCL-12g
• the sequence of CXCL- 12g is the following: CXCL- 12g:
• An exemplary peptide includes all or part of SEQ ID NO: 12 and the following peptide: GRREEK V GKKEKIGKKKRQKKRK A AQKRKN (SEQ ID NO: 17).
• the ECM-affmity peptide may be a peptide with 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, or 100% identity (or any derivable range therein) to an ECM or CBD peptide or fragment of the peptides described above.
• a linker sequence may be included in the anti-inflammatory agent-peptide construction.
• a linker having at least, at most, or exactly 3, 4, 5, 6, 7, 8, 9, 10,
• 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100 or more amino acids (or any derivable range therein) may separate that antibody and the peptide.
• the ECM-affmity peptides of the disclosure may have affinity to one or more components of the extracellular matrix such as fibronectin, collagen, (collagen type I, collagen type III, and/or collagen type IV) tenascin C, fibrinogen, and fibrin.
• fibronectin collagen
• collagen type I collagen type III
• collagen type IV collagen type IV
• tenascin C tenascin C
• fibrinogen tenascin C
• fibrinogen fibrinogen
• fibrin fibrinogen
• the ECM-affmity peptides and/or anti-inflammatory agent of the disclosure is further linked to a serum protein.
• Serum proteins include, for example, albumin, globulin, and fibrinogen. Globulins include alpha 1 globulins, alpha 2 globulins, beta globulins, and gamma globulins.
• the albumin may be mouse, human, bovine, or any other homologous albumin protein.
• the albumin comprises human serum albumin, which is encoded by the ALB gene, and exemplified by the following amino acid sequence:
• serum albumin comprises a polypeptide having the following sequence:
• the albumin comprises mouse albumin having the following sequence:
• Related embodiments comprise a vWF A3 (uppercase) linked through a glycine serine peptide linker (italic uppercase and underlined) with mouse serum albumin (MSA) (lowercase is MSA):
• Further related embodiments comprise a vWF A3 (uppercase) linked through a glycine serine peptide linker (italic uppercase and underlined) with mouse serum albumin
• MSA lowercase is MSA
• vWF A3 uppercase linked through a glycine serine peptide linker (italic uppercase and underlined) with human serum albumin (HSA)
• HSA human serum albumin
• polypeptides or polynucleotides of the disclosure may include 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12,
• polypeptides or polynucleotides of the disclosure may include 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
• a polypeptide of the disclosure may comprise amino acids 1 to 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28,
• a polypeptide of the disclosure such as the ECM-affmity peptide, serum protein, or cytokine polypeptide, may comprise at least, at most, or exactly 2,
• the polypeptide such as the ECM-affmity peptide, serum protein, or cytokine polypeptide, may comprise at least, at most, or exactly 1, 2, 3, 4, 5, 6, 7, 8,
• SEQ ID NOs: 1-66 contiguous amino acids of SEQ ID NOs: 1-66 that are at least, at most, or exactly 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% similar, identical, or homologous with any one of SEQ ID NOS: 1-66.
• a polypeptide of the disclosure such as an ECM-affmity peptide, serum protein, or cytokine polypeptide, may be at least, at most, or exactly 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or 100% (or any range derivable therein) similar, identical, or homologous with one of SEQ ID NOS: 1-66.
• nucleic acid molecule or polypeptide starting at position 1 there is a nucleic acid molecule or polypeptide starting at position
• polypeptides and nucleic acids of the disclosure may include at least, at most, or exactly 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25,
• substitution may be at amino acid position or nucleic acid position 1, 2, 3, 4, 5,
• Peptides, polypeptides, and proteins of the disclosure having at least, having at least, or having 70, 75, 80, 85, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100% identity to any one of SEQ ID NO: 1-66 includes a fragment or segment starting at amino acid 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
• Substitutional variants typically contain the exchange of one amino acid for another at one or more sites within the protein, and may be designed to modulate one or more properties of the polypeptide, with or without the loss of other functions or properties. Substitutions may be conservative, that is, one amino acid is replaced with one of similar shape and charge.
• Conservative substitutions are well known in the art and include, for example, the changes of: alanine to serine; arginine to lysine; asparagine to glutamine or histidine; aspartate to glutamate; cysteine to serine; glutamine to asparagine; glutamate to aspartate; glycine to proline; histidine to asparagine or glutamine; isoleucine to leucine or valine; leucine to valine or isoleucine; lysine to arginine; methionine to leucine or isoleucine; phenylalanine to tyrosine, leucine or methionine; serine to threonine; threonine to serine; tryptophan to tyrosine; tyrosine to tryptophan or phenylalanine; and valine to isoleucine or leucine.
• substitutions may be non-conservative such that a function or activity of the polypeptide is affected.
• Non conservative changes typically involve substituting a residue with one that is chemically dissimilar, such as a polar or charged amino acid for a nonpolar or uncharged amino acid, and vice versa.
• One or more of these substitutions may be specifically excluded from an embodiment.
• Proteins may be recombinant, or synthesized in vitro. Alternatively, a non recombinant or recombinant protein may be isolated from bacteria. It is also contemplated that bacteria containing such a variant may be implemented in compositions and methods. Consequently, a protein need not be isolated.
• the term“functionally equivalent codon” is used herein to refer to codons that encode the same amino acid, such as the six codons for arginine or serine, and also refers to codons that encode biologically equivalent amino acids.
• amino acid and nucleic acid sequences may include additional residues, such as additional N- or C-terminal amino acids, or 5' or 3' sequences, respectively, and yet still be essentially as set forth in one of the sequences disclosed herein, so long as the sequence meets the criteria set forth above, including the maintenance of biological protein activity where protein expression is concerned.
• the addition of terminal sequences particularly applies to nucleic acid sequences that may, for example, include various non coding sequences flanking either of the 5' or 3' portions of the coding region.
• amino acids of a protein may be substituted for other amino acids in a protein structure without appreciable loss of interactive binding capacity.
• Structures such as, for example, an enzymatic catalytic domain or interaction components may have amino acid substituted to maintain such function. Since it is the interactive capacity and nature of a protein that defines that protein’s biological functional activity, certain amino acid substitutions can be made in a protein sequence, and in its underlying DNA coding sequence, and nevertheless produce a protein with like properties. It is thus contemplated by the inventors that various changes may be made in the DNA sequences of genes without appreciable loss of their biological utility or activity.
• alteration of the function of a polypeptide is intended by introducing one or more substitutions.
• certain amino acids may be substituted for other amino acids in a protein structure with the intent to modify the interactive binding capacity of interaction components. Structures such as, for example, protein interaction domains, nucleic acid interaction domains, and catalytic sites may have amino acids substituted to alter such function. Since it is the interactive capacity and nature of a protein that defines that protein’s biological functional activity, certain amino acid substitutions can be made in a protein sequence, and in its underlying DNA coding sequence, and nevertheless produce a protein with different properties. It is thus contemplated by the inventors that various changes may be made in the DNA sequences of genes with appreciable alteration of their biological utility or activity.
• the hydropathic index of amino acids may be considered.
• the importance of the hydropathic amino acid index in conferring interactive biologic function on a protein is generally understood in the art (Kyte and Doolittle, 1982). It is accepted that the relative hydropathic character of the amino acid contributes to the secondary structure of the resultant protein, which in turn defines the interaction of the protein with other molecules, for example, enzymes, substrates, receptors, DNA, antibodies, antigens, and the like.
• amino acid substitutions generally are based on the relative similarity of the amino acid side-chain substituents, for example, their hydrophobicity, hydrophilicity, charge, size, and the like.
• Exemplary substitutions that take into consideration the various foregoing characteristics are well known and include: arginine and lysine; glutamate and aspartate; serine and threonine; glutamine and asparagine; and valine, leucine and isoleucine.
• all or part of proteins described herein can also be synthesized in solution or on a solid support in accordance with conventional techniques.
• Various automatic synthesizers are commercially available and can be used in accordance with known protocols. See, for example, Stewart and Young, (1984); Tam et al., (1983); Merrifield, (1986); and Barany and Merrifield (1979), each incorporated herein by reference.
• recombinant DNA technology may be employed wherein a nucleotide sequence that encodes a peptide or polypeptide is inserted into an expression vector, transformed or transfected into an appropriate host cell and cultivated under conditions suitable for expression.
• One embodiment includes the use of gene transfer to cells, including microorganisms, for the production and/or presentation of proteins.
• the gene for the protein of interest may be transferred into appropriate host cells followed by culture of cells under the appropriate conditions.
• a nucleic acid encoding virtually any polypeptide may be employed.
• the generation of recombinant expression vectors, and the elements included therein, are discussed herein.
• the protein to be produced may be an endogenous protein normally synthesized by the cell used for protein production.
• the current disclosure concerns recombinant polynucleotides encoding the proteins, polypeptides, and peptides of the invention, such as ECM-affmity peptide operatively linked to anti-inflammatory agents and/or other molecules. Therefore, certain embodiments relate to nucleotides encoding for an ECM-affmity polypeptide and/or an ECM-affmity polypeptide or fragment thereof fused to an anti inflammatory agent or fragment thereof.
• polynucleotide refers to a nucleic acid molecule that either is recombinant or has been isolated free of total genomic nucleic acid.
• polynucleotide oligonucleotides (nucleic acids of 100 residues or less in length), recombinant vectors, including, for example, plasmids, cosmids, phage, viruses, and the like.
• Polynucleotides include, in certain aspects, regulatory sequences, isolated substantially away from their naturally occurring genes or protein encoding sequences. Polynucleotides may be single-stranded (coding or antisense) or double-stranded, and may be RNA, DNA (genomic, cDNA or synthetic), analogs thereof, or a combination thereof. Additional coding or non-coding sequences may, but need not, be present within a polynucleotide.
• the term“gene,”“polynucleotide,” or“nucleic acid” is used to refer to a nucleic acid that encodes a protein, polypeptide, or peptide (including any sequences required for proper transcription, post-translational modification, or localization).
• this term encompasses genomic sequences, expression cassettes, cDNA sequences, and smaller engineered nucleic acid segments that express, or may be adapted to express, proteins, polypeptides, domains, peptides, fusion proteins, and mutants.
• a nucleic acid encoding all or part of a polypeptide may contain a contiguous nucleic acid sequence of: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300, 310, 320, 330, 340, 350, 360, 370, 380, 390, 400, 410, 420, 430, 440, 441, 450, 460, 470, 480, 490, 500, 510, 520, 530, 540, 550,
• nucleotides, nucleosides, or base pairs or more nucleotides, nucleosides, or base pairs (or any range derivable therein), including all values and ranges there between, of a polynucleotide encoding one or more amino acid sequence described or referenced herein. It also is contemplated that a particular polypeptide may be encoded by nucleic acids containing variations having slightly different nucleic acid sequences but, nonetheless, encode the same or substantially similar protein.
• the invention concerns isolated nucleic acid segments and recombinant vectors incorporating nucleic acid sequences that encode a polypeptide or peptide of the disclosure.
• the term“recombinant” may be used in conjunction with a polynucleotide or polypeptide and generally refers to a polypeptide or polynucleotide produced and/or manipulated in vitro or that is a replication product of such a molecule.
• the invention concerns isolated nucleic acid segments and recombinant vectors incorporating nucleic acid sequences that encode a polypeptide or peptide of the disclosure.
• nucleic acid segments used in the current disclosure can be combined with other nucleic acid sequences, such as promoters, polyadenylation signals, additional restriction enzyme sites, multiple cloning sites, other coding segments, and the like, such that their overall length may vary considerably. It is therefore contemplated that a nucleic acid fragment of almost any length may be employed, with the total length preferably being limited by the ease of preparation and use in the intended recombinant nucleic acid protocol.
• a nucleic acid sequence may encode a polypeptide sequence with additional heterologous coding sequences, for example to allow for purification of the polypeptide, transport, secretion, post- translational modification, or for therapeutic benefits such as targeting or efficacy.
• a tag or other heterologous polypeptide may be added to the modified polypeptide-encoding sequence, wherein“heterologous” refers to a polypeptide that is not the same as the modified polypeptide.
• the current disclosure provides polynucleotide variants having substantial identity to the sequences disclosed herein; those comprising at least 70%, 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, or 99% or higher sequence identity, including all values and ranges there between, compared to a polynucleotide sequence of this disclosure using the methods described herein (e.g., BLAST analysis using standard parameters).
• the disclosure also contemplates the use of polynucleotides which are complementary to all the above described polynucleotides.
• Polypeptides of the disclosure may be encoded by a nucleic acid molecule comprised in a vector.
• the term“vector” is used to refer to a carrier nucleic acid molecule into which a heterologous nucleic acid sequence can be inserted for introduction into a cell where it can be replicated and expressed.
• a nucleic acid sequence can be“heterologous,” which means that it is in a context foreign to the cell in which the vector is being introduced or to the nucleic acid in which is incorporated, which includes a sequence homologous to a sequence in the cell or nucleic acid but in a position within the host cell or nucleic acid where it is ordinarily not found.
• Vectors include DNAs, RNAs, plasmids, cosmids, viruses (bacteriophage, animal viruses, and plant viruses), and artificial chromosomes (e.g., YACs).
• viruses bacteriophage, animal viruses, and plant viruses
• artificial chromosomes e.g., YACs.
• One of skill in the art would be well equipped to construct a vector through standard recombinant techniques (for example Sambrook et ah, 2001; Ausubel et ah, 1996, both incorporated herein by reference).
• the vector can encode other polypeptide sequences such as a one or more other bacterial peptide, a tag, or an immunogenicity enhancing peptide.
• Useful vectors encoding such fusion proteins include pIN vectors (Inouye et ah, 1985), vectors encoding a stretch of histidines, and pGEX vectors, for use in generating glutathione S- transferase (GST) soluble fusion proteins for later purification and separation or cleavage.
• GST glutathione S- transferase
• expression vector refers to a vector containing a nucleic acid sequence coding for at least part of a gene product capable of being transcribed. In some cases, RNA molecules are then translated into a protein, polypeptide, or peptide.
• Expression vectors can contain a variety of“control sequences,” which refer to nucleic acid sequences necessary for the transcription and possibly translation of an operably linked coding sequence in a particular host organism. In addition to control sequences that govern transcription and translation, vectors and expression vectors may contain nucleic acid sequences that serve other functions as well and are described herein.
• A“promoter” is a control sequence.
• the promoter is typically a region of a nucleic acid sequence at which initiation and rate of transcription are controlled. It may contain genetic elements at which regulatory proteins and molecules may bind such as RNA polymerase and other transcription factors.
• the phrases“operatively positioned,”“operatively linked,”“under control,” and“under transcriptional control” mean that a promoter is in a correct functional location and/or orientation in relation to a nucleic acid sequence to control transcriptional initiation and expression of that sequence.
• a promoter may or may not be used in conjunction with an “enhancer,” which refers to a cis-acting regulatory sequence involved in the transcriptional activation of a nucleic acid sequence.
• promoter and/or enhancer that effectively directs the expression of the DNA segment in the cell type or organism chosen for expression.
• Those of skill in the art of molecular biology generally know the use of promoters, enhancers, and cell type combinations for protein expression (see Sambrook et ah, 2001, incorporated herein by reference).
• the promoters employed may be constitutive, tissue-specific, or inducible and in certain embodiments may direct high level expression of the introduced DNA segment under specified conditions, such as large-scale production of recombinant proteins or peptides.
• the particular promoter that is employed to control the expression of peptide or protein encoding polynucleotide of the invention is not believed to be critical, so long as it is capable of expressing the polynucleotide in a targeted cell, preferably a bacterial cell. Where a human cell is targeted, it is preferable to position the polynucleotide coding region adjacent to and under the control of a promoter that is capable of being expressed in a human cell. Generally speaking, such a promoter might include either a bacterial, human or viral promoter.
• a specific initiation signal also may be required for efficient translation of coding sequences. These signals include the ATG initiation codon or adjacent sequences. Exogenous translational control signals, including the ATG initiation codon, may need to be provided. One of ordinary skill in the art would readily be capable of determining this and providing the necessary signals.
• IRES elements are used to create multigene, or polycistronic, messages.
• IRES elements are able to bypass the ribosome scanning model of 5’ methylated Cap dependent translation and begin translation at internal sites (Pelletier and Sonenberg, 1988; Macejak and Samow, 1991).
• IRES elements can be linked to heterologous open reading frames. Multiple open reading frames can be transcribed together, each separated by an IRES, creating polycistronic messages. Multiple genes can be efficiently expressed using a single promoter/enhancer to transcribe a single message (see U.S. Patents 5,925,565 and 5,935,819, herein incorporated by reference).
• cells containing a nucleic acid construct of the current disclosure may be identified in vitro or in vivo by encoding a screenable or selectable marker in the expression vector.
• a marker When transcribed and translated, a marker confers an identifiable change to the cell permitting easy identification of cells containing the expression vector.
• a selectable marker is one that confers a property that allows for selection.
• a positive selectable marker is one in which the presence of the marker allows for its selection, while a negative selectable marker is one in which its presence prevents its selection.
• An example of a positive selectable marker is a drug resistance marker.
• “cell,” “cell line,” and“cell culture” may be used interchangeably. All of these terms also include their progeny, which is any and all subsequent generations. It is understood that all progeny may not be identical due to deliberate or inadvertent mutations.
• “host cell” refers to a prokaryotic or eukaryotic cell, and it includes any transformable organism that is capable of replicating a vector or expressing a heterologous gene encoded by a vector.
• a host cell can, and has been, used as a recipient for vectors or viruses.
• a host cell may be “transfected” or“transformed,” which refers to a process by which exogenous nucleic acid, such as a recombinant protein-encoding sequence, is transferred or introduced into the host cell.
• a transformed cell includes the primary subject cell and its progeny.
• Host cells may be derived from prokaryotes or eukaryotes, including bacteria, yeast cells, insect cells, and mammalian cells for replication of the vector or expression of part or all of the nucleic acid sequence(s). Numerous cell lines and cultures are available for use as a host cell, and they can be obtained through the American Type Culture Collection (ATCC), which is an organization that serves as an archive for living cultures and genetic materials (www.atcc.org).
• ATCC American Type Culture Collection
• compositions discussed above Numerous expression systems exist that comprise at least a part or all of the compositions discussed above.
• Prokaryote- and/or eukaryote-based systems can be employed for use with the present invention to produce nucleic acid sequences, or their cognate polypeptides, proteins and peptides. Many such systems are commercially and widely available.
• the insect cell/baculovirus system can produce a high level of protein expression of a heterologous nucleic acid segment, such as described in U.S. Patents 5,871,986, 4,879,236, both herein incorporated by reference, and which can be bought, for example, under the name MAXBAC® 2.0 from INVITROGEN® and BACPACKTM BACULOVIRUS EXPRESSION SYSTEM FROM CLONTECH®.
• a heterologous nucleic acid segment such as described in U.S. Patents 5,871,986, 4,879,236, both herein incorporated by reference, and which can be bought, for example, under the name MAXBAC® 2.0 from INVITROGEN® and BACPACKTM BACULOVIRUS EXPRESSION SYSTEM FROM CLONTECH®.
• STRATAGENE® COMPLETE CONTROL ⁇ Inducible Mammalian Expression System, which involves a synthetic ecdysone-inducible receptor, or its pET Expression System, an E. coli expression system.
• INVITROGEN® which carries the T-REXTM (tetracycline-regulated expression) System, an inducible mammalian expression system that uses the full-length CMV promoter.
• INVITROGEN® also provides a yeast expression system called the Pichia methanolica Expression System, which is designed for high-level production of recombinant proteins in the methyl otrophic yeast Pichia methanolica.
• a vector such as an expression construct, to produce a nucleic acid sequence or its cognate polypeptide, protein, or peptide.
• compositions and related methods of the present disclosure particularly administration of and ECM-affmity peptide operatively linked to an anti-inflammatory agent and/or other molecules may also be used in combination with the administration of additional therapies such as the additional therapeutics described herein or in combination with other traditional therapeutics known in the art for the treatment of autoimmune or inflammatory conditions.
• compositions and treatments disclosed herein may precede, be co current with and/or follow another treatment or agent by intervals ranging from minutes to weeks.
• agents are applied separately to a cell, tissue or organism, one would generally ensure that a significant period of time did not expire between the time of each delivery, such that the therapeutic agents would still be able to exert an advantageously combined effect on the cell, tissue or organism.
• one may contact the cell, tissue or organism with two, three, four or more agents or treatments substantially simultaneously (i.e., within less than about a minute).
• one or more therapeutic agents or treatments may be administered or provided within 1 minute, 5 minutes, 10 minutes, 20 minutes, 30 minutes, 45 minutes, 60 minutes, 2 hours, 3 hours, 4 hours, 5 hours, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours, 13 hours, 14 hours, 15 hours, 16 hours, 17 hours, 18 hours, 19 hours, 20 hours, 21 hours, 22 hours, 22 hours, 23 hours, 24 hours, 25 hours, 26 hours, 27 hours, 28 hours, 29 hours, 30 hours, 31 hours, 32 hours, 33 hours, 34 hours, 35 hours, 36 hours, 37 hours, 38 hours, 39 hours, 40 hours, 41 hours, 42 hours, 43 hours, 44 hours, 45 hours, 46 hours, 47 hours, 48 hours, 1 day,
• a therapeutic agent such as a composition disclosed herein is“A” and a second agent, such as an additional agent or therapy described herein or known in the art is“B”:
• more than one course of therapy may be employed. It is contemplated that multiple courses may be implemented.
• compositions of the disclosure may be used for in vivo, in vitro, or ex vivo administration.
• the route of administration of the composition may be, for example, intracutaneous, subcutaneous, intravenous, local, topical, and intraperitoneal administrations.
• the autoimmune condition or inflammatory condition amenable for treatment may include, but not be limited to conditions such as diabetes (e.g. type 1 diabetes), graft rejection, arthritis (rheumatoid arthritis such as acute arthritis, chronic rheumatoid arthritis, gout or gouty arthritis, acute gouty arthritis, acute immunological arthritis, chronic inflammatory arthritis, degenerative arthritis, type II collagen-induced arthritis, infectious arthritis, Lyme arthritis, proliferative arthritis, psoriatic arthritis, Still's disease, vertebral arthritis, and systemic juvenile-onset rheumatoid arthritis, osteoarthritis, arthritis chronica progrediente, arthritis deformans, polyarthritis chronica primaria, reactive arthritis, and ankylosing spondylitis), inflammatory hyperproliferative skin diseases, psoriasis such as plaque psoriasis, gutatte psoriasis, pustular psoriasis, and psoriasis of the
• vasculitides including vasculitis, large-vessel vasculitis (including polymyalgia rheumatica and gianT cell (Takayasu's) arteritis), medium- vessel vasculitis (including Kawasaki's disease and polyarteritis nodosa/periarteritis nodosa), microscopic polyarteritis, immunovasculitis, CNS vasculitis, cutaneous vasculitis, hypersensitivity vasculitis, necrotizing vasculitis such as systemic necrotizing vasculitis, and ANCA-associated vasculitis, such as Churg-Strauss vasculitis or syndrome (CSS) and ANCA-associated vasculitis, such as Churg-Strauss vasculitis or syndrome (CSS) and ANCA-associated vasculitis, such as Churg-Strauss vasculitis or syndrome (CSS) and ANCA-associated vasculitis, such as Churg-Straus
• compositions are administered to a subject. Different aspects involve administering an effective amount of a composition to a subject.
• a composition comprising an anti-inflammatory agent may be administered to the subject or patient to treat inflammation and/or autoimmunity. Additionally, such compounds can be administered in combination with an additional treatment.
• compositions can be formulated for parenteral administration, e.g., formulated for injection via the intravenous, transcatheter injection, intraarterial injection, intramuscular, sub cutaneous, or even intraperitoneal routes.
• parenteral administration e.g., formulated for injection via the intravenous, transcatheter injection, intraarterial injection, intramuscular, sub cutaneous, or even intraperitoneal routes.
• such compositions can be prepared as injectables, either as liquid solutions or suspensions; solid forms suitable for use to prepare solutions or suspensions upon the addition of a liquid prior to injection can also be prepared; and, the preparations can also be emulsified.
• the preparation of such formulations will be known to those of skill in the art in light of the present disclosure.
• Other routes of administration include intratumoral, peri-tumoral, intralymphatic, injection into inflamed tissue, or into lymph nodes. In some embodiments, the administration is systemic.
• constructs and agents may be administered in association with a carrier.
• the carrier is a nanoparticle or microparticle.
• Particles can have a structure of variable dimension and known variously as a microsphere, microparticle, nanoparticle, nanosphere, or liposome. Such particulate formulations can be formed by covalent or non-covalent coupling of the construct to the particle.
• By“particle,”“microparticle,”“bead,”“microsphere,” and grammatical equivalents herein is meant small discrete particles that are administrable to a subject.
• the particles are substantially spherical in shape.
• the term“substantially spherical,” as used herein, means that the shape of the particles does not deviate from a sphere by more than about 10%.
• the particles typically consist of a substantially spherical core and optionally one or more layers.
• the core may vary in size and composition.
• the particle may have one or more layers to provide functionalities appropriate for the applications of interest.
• the thicknesses of layers, if present, may vary depending on the needs of the specific applications. For example, layers may impart useful optical properties.
• the pharmaceutical forms suitable for injectable use include sterile aqueous solutions or dispersions; formulations including sesame oil, peanut oil, or aqueous propylene glycol; and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersions.
• the form must be sterile and must be fluid to the extent that it may be easily injected. It also should be stable under the conditions of manufacture and storage and must be preserved against the contaminating action of microorganisms, such as bacteria and fungi.
• the carrier also can be a solvent or dispersion medium containing, for example, water, ethanol, polyol (for example, glycerol, propylene glycol, and liquid polyethylene glycol, and the like), suitable mixtures thereof, and vegetable oils.
• the proper fluidity can be maintained, for example, by the use of a coating, such as lecithin, by the maintenance of the required particle size in the case of dispersion, and by the use of surfactants.
• the prevention of the action of microorganisms can be brought about by various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, sorbic acid, thimerosal, and the like.
• isotonic agents for example, sugars or sodium chloride.
• Prolonged absorption of the injectable compositions can be brought about by the use in the compositions of agents delaying absorption, for example, aluminum monostearate and gelatin.
• Sterile injectable solutions are prepared by incorporating the active compounds in the required amount in the appropriate solvent with various of the other ingredients enumerated above, as required, followed by filtered sterilization.
• dispersions are prepared by incorporating the various sterilized active ingredients into a sterile vehicle which contains the basic dispersion medium and the required other ingredients from those enumerated above.
• the preferred methods of preparation are vacuum-drying and freeze-drying techniques, which yield a powder of the active ingredient, plus any additional desired ingredient from a previously sterile-filtered solution thereof.
• the term“pharmaceutically acceptable” refers to those compounds, materials, compositions, and/or dosage forms which are, within the scope of sound medical judgment, suitable for contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem complications commensurate with a reasonable benefit/risk ratio.
• pharmaceutically acceptable carrier means a pharmaceutically acceptable material, composition or vehicle, such as a liquid or solid filler, diluent, excipient, solvent or encapsulating material, involved in carrying or transporting a chemical agent.
• “pharmaceutically acceptable salts” refers to derivatives of the disclosed compounds wherein the parent compound is modified by converting an existing acid or base moiety to its salt form.
• pharmaceutically acceptable salts include, but are not limited to, mineral or organic acid salts of basic residues such as amines; alkali or organic salts of acidic residues such as carboxylic acids; and the like.
• Pharmaceutically acceptable salts include the conventional non-toxic salts or the quaternary ammonium salts of the parent compound formed, for example, from non-toxic inorganic or organic acids.
• the pharmaceutically acceptable salts can be synthesized from the parent compound which contains a basic or acidic moiety by conventional chemical methods.
• unit dose or“dosage” refers to physically discrete units suitable for use in a subject, each unit containing a predetermined quantity of the composition calculated to produce the desired responses discussed above in association with its administration, i.e., the appropriate route and regimen.
• the quantity to be administered both according to number of treatments and unit dose, depends on the effects desired. Precise amounts of the composition also depend on the judgment of the practitioner and are peculiar to each individual. Factors affecting dose include physical and clinical state of the subject, route of administration, intended goal of treatment (alleviation of symptoms versus cure), and potency, stability, and toxicity of the particular composition.
• solutions Upon formulation, solutions will be administered in a manner compatible with the dosage formulation and in such amount as is therapeutically or prophylactically effective.
• the formulations are easily administered in a variety of dosage forms, such as the type of injectable solutions described above.
• a subject is administered about, at least about, or at most about 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9,
• a dose may be administered on an as needed basis or every 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18, or 24 hours (or any range derivable therein) or 1, 2, 3, 4, 5, 6, 7, 8, 9, or times per day (or any range derivable therein).
• a dose may be first administered before or after signs of a condition.
• the patient is administered a first dose of a regimen 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 hours (or any range derivable therein) or 1, 2, 3, 4, or 5 days after the patient experiences or exhibits signs or symptoms of the condition (or any range derivable therein).
• the patient may be treated for 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more days (or any range derivable therein) or until symptoms of the condition have disappeared or been reduced or after 6, 12, 18, or 24 hours or 1, 2, 3, 4, or 5 days after symptoms of an infection have disappeared or been reduced.
• CBP-conjugation provided collagen affinity to anti-TNFa antibody (aTNF)
• aTNF anti-TNFa antibody
• sulfo-SMCC sulfosuccinimidyl-4-(N- maleimidomethyl) cyclohexane- 1-carboxylate
• MALDI-TOF matrix- assisted laser desorption/ionization-time-of-flight
• CBP-aTNF CBP-conjugated aTNF
• WT-aTNF unmodified aTNF
• CBP-aTNF inflamed paw of the collagen antibody-induced arthritis (CAIA) model through binding to endogenous collagen was determined by in vivo bio-distribution analysis. Arthritis was induced selectively in right hind paw by passive immunization of anti-collagen antibodies, followed by subcutaneous injection of LPS at right hind footpad. The local LPS injection induced severe arthritis at the right hind paw compared with the other paws. On the following day of LPS injection, fluorescence labeled CBP-aTNF and WT-aTNF was intravenously injected into the CAIA and naive mice.
• CAIA collagen antibody-induced arthritis
• Fluorescence level in whole body was measured before the antibody injection and at 0.5, 1, 2, 4, 6, 24, and 48 hours after the injection.
• the fluorescence level in right hind arthritic paw of the CAIA mice injected with CBP-aTNF and WT-aTNF increased immediately after the injection, whereas that of naive mice was almost the same in both arthritic and non-arthritic paws (FIGS. 2 A and 2B).
• the ratio of the level in arthritic paw to non-arthritic paw was higher in mice injected with CBP-aTNF than WT-aTNF (FIG. 2C).
• Arthritis was induced in all paws by passive immunization of anti-collagen antibodies, followed by intraperitoneal injection of LPS.
• control IgG, WT-aTNF, or CBP-aTNF was intravenously injected.
• Arthritis score was increased in control mice and the score was reduced by WT-aTNF and CBP-aTNF (FIG. 3A).
• the score reduction in CBP-aTNF -treated mice was significantly greater than WT-aTNF -treated mice.
• the histological observation revealed that the joint destruction was significantly suppressed by CBP-aTNF (FIG.
• CBP-aTNF provides superior anti-inflammatory efficacy to its unmodified form.
• aTNF with promiscuous ECM-binding peptide derived from placenta growth factor 2 (specifically, PlGF-2123-144) in the same manner as CBP conjugation described previously (32, 33).
• P1GF -2123-144 peptide binds to multiple ECM proteins with high affinity, thus it retains at injection site.
• PlGF-2i23-i44-conjugated aTNF (PlGF-2i23-i44-aTNF) injected at left hind footpad of CAIA mice retained at the injection site, whereas the signal from WT-aTNF rapidly reduced after the injection (FIG. 5 A).
• control IgG, WT-aTNF, or PlGF-2i23-i44-aTNF was injected subcutaneously at left hind footpad of CAIA mice. Arthritis score was increased in both right and left hind limbs in control IgG-treated mice. WT-aTNF did not suppress the score in this treatment regimen. PlGF-2i23-i44-aTNF, however, suppressed arthritis development almost completely in the treated paw (left) even at 100-times lower dose than WT-aTNF. Interestingly, PlGF-2i23-i44-aTNF did not suppress the arthritis development in the untreated paw (right), indicating its localized efficacy (FIG. 5B).
• CBD protein derived from the vWF A3 domain can target inflamed spinal cord in the experimental autoimmune encephalomyelitis (EAE) model
• IL-4 is a cytokine that induces differentiation of naive helper T cells (ThO) to Th2 cells.
• ThO naive helper T cells
• Application of IL-4 to the central nerve system by intrathecal or intranasal administration has been reported to ameliorate clinical signs and axonal morphology in experimental autoimmune encephalomyelitis (EAE) model, a mouse model for multiple sclerosis.
• EAE experimental autoimmune encephalomyelitis
• A3-IL4 synthesized vWF A3 domain-fused IL-4 (A3-IL4) protein.
• A3- IL4 bound to collagen III with a dissociation constant (Kd) of 28.6 nM (FIG. 6A).
• vWF A3 domain-fusion to IL-4 did not abolish the binding affinity against its receptor, IL-4Ra (FIG. 6B).
• fluorescence imaging On day 14 post-immunization when the target tissues were inflamed, fluorescence-labeled A3 or A3-IL4 was intravenously injected into the naive and EAE mice. A3 and A3-IL4 were detected in spinal cord of EAE mice, but not in that of a naive mouse (Fig. 6C). The inventors next examined the therapeutic effect of A3-IL4 on EAE symptoms.
• A3 protein and CBP-conjugate can also target inflamed tissues of other inflammatory disease models
• collagen affinity as a drug delivery method is neither tissue, molecular expression, nor disease specific approach, rather general inflammation specific approach. More importantly, CBP- aTNF reduced arthritis score more effectively than unmodified aTNF in CAIA model.
• aTNF for inflammatory diseases such as RA and IBD does not show complete response in most patients and can have significant side effects (6-10). Therefore, CBP-aTNF holds translational potential to achieve advanced therapy for inflammation and autoimmune diseases.
• the inventors used CAIA model for autoantibody-induced acute inflammation, EAE model for autoimmune-mediated chronic inflammation, IBD model for spontaneous developed inflammation, IPF model for fibrosis accompanied by inflammation, and T1D for spontaneously developed T-cell mediated autoimmune disease, as principal inflammatory models. These data suggest that collagen binding antibodies and cytokines are able to achieve efficient antibody and cytokine therapy in multiple inflammatory diseases through accumulating in the site of inflammation. [0222] This example shows that local injection of PlGF-2i23-i44-aTNF retained at injection site and showed strong therapeutic efficacy at a low dose. However, PlGF-2i23-i44-aTNF therapy is effective only when locally injected due to its promiscuous ECM affinity.
• the main translational advantage of collagen binding approach for inflammation-targeted therapy is that it can target inflammatory site from systemic delivery route.
• an advantage lies in the use of the A3 domain from vWF or the CBP from decorin is that both naturally exists in the human body, limiting the possibility of immune system recognition.
• the CBP can be conjugated to antibodies with a simple chemical reaction.
• the advantage of this feature is in simplicity in production, in that it is possible to work with antibodies for which production has already been optimized.
• the inventors have shown that CBP was able to conjugate both anti-TNFa and anti-TGFp antibodies in this example.
• the CBP conjugation synthesis reaction for antibodies can be done in only 90 minutes, using chemistry that is analogous to PEGylation of proteins.
• the same reaction is used in antibody-drug conjugates, such as in the production of trastuzumab emtansine (35, 36).
• trastuzumab emtansine 35, 36.
• A3-IL4 given that cytokines are small molecules and are generally easy to produce, the inventors chose to recombinantly fuse rather than to conjugate the A3 with IL-4.
• Rat anti-mouse TNF-a antibody (clone XT3.11, BioXcell) was incubated with 20 eq. of sulfo-succinimidyl 4-(N-maleimidom ethyl) cyclohexane- 1-carboxylate (sulfo-SMCC) for 30 min at room temperature. Excess sulfo-SMCC was removed using a Zeba spin desalting column (Thermo Fisher Scientific). 30 eq. of collagen-binding sequence peptide derived from decorion (CBP, LRELHLNNNC) was then added and reacted for 1 hour at room temperature for conjugation to the thiol moiety on the C residue. The peptide had been synthesized with > 95% purity by Genscript. 2. Production and purification of recombinant vWF A3 domain and A3- fused IL-4 proteins
• 96-well ELISA plates (Greiner Bio One) were coated with types I, II, and III human collagen (10 pg/mL each in PBS, Millipore Sigma) for overnight at 37 °C, followed by blocking with 1% BSA in PBS with 0.05% Tween 20 (PBS-T) for 1 hour at room temperature. Then, wells were washed with PBS- T and further incubated with 1 pM CBP-aTNF, 1 pM unmodified aTNF, or 0-740 nM A3-IL4 for 1 hour at room temperature.
• Antibodies were analyzed by MALDI-TOF MS (Bruker Ultrafl extreme MALDI TOF/TOF). All spectra were collected with acquisition software Bruker flexControlTM and processed with analysis software Bruker flex AnalysisTM. First, a saturated solution of the matrix, a-cyano-4-hydroxycinnamic acid (Sigma-Aldrich), was prepared in 50:50 acetonitrile: 1% TFA in water as a solvent. The analyte in PBS (5 pL, 0.1 mg/mL) and the matrix solution (25 pL) were then mixed, and 1 pL of that mixture was deposited on the MTP 384 ground steel target plate.
• MALDI-TOF MS Bruker Ultrafl extreme MALDI TOF/TOF
• Anti-TNFa antibody (clone XT3.11, BioXcell) and anti-TGF-b antibody (clone 1D11.16.8, BioXcell) were incubated with 8 eq. of SM(PEG)24 (Thermo Fisher Scientific) for 30 min at room temperature. Excess SM(PEG)24 was removed using a Zeba spin desalting column (Thermo Fisher Scientific). 30 eq Cy7-labeled CBP ([Cy7]LRELHLNNNC[COOH]) was then added and reacted for 30 min at room temperature for conjugation to the thiol moiety on the C residue. The peptide had been synthesized with >95% purity by Genscript.
• aTNF and aTGF were labeled using sulfo-Cy7 NHS ester (Lumiprobe) according to the manufacture’s instruction.
• A3 and A3-IL4 were labeled using DyLight 800 NHS ester (Thermo Fisher Sientific) according to the manufacture’s instruction.
• DyLight 800 labeled WT-aTNF, WT-aTGF, CBP-aTNF and CBP-aTGF, or DyLight 800 labeled A3 and A3-IL4 were intravenously injected.
• mice were harvested and imaged with the Xenogen IVIS Imaging System 100 (Xenogen) under the following conditions: f/stop: 2; optical filter excitation 745 nm; excitation 800 nm; exposure time: 5 sec; small binning.
• mice were injected intravenously or subcutaneously at back with control IgG (200 pg/mouse), WT-aTNF (200 pg/mouse), or CBP-aTNF (200 pg/mouse); or injected subcutaneously at left hind footpad with control IgG (100 pg/mouse), WT-aTNF (100 pg/mouse), or PlGF-2i23-i44-aTNF (1 pg/mouse). Joint swelling was scored everyday as described elsewhere (31). On day 8, hind paws were fixed in 10% neutral formalin (Sigma- Aldrich), decalcified in Decalcifer II (Leica), and then provided to histological analysis.
• EAE Experimental autoimmune encephalomyelitis
• EAE was induced in female C57BL/6 mice (13 weeks of age) by immunization with an emulsion of MOG35-55 in complete Freund's adjuvant (200 pg/mouse, Hooke Laboratories) on day 0, followed by administration of pertussis toxin in PBS (100 ng/mouse) on the day of immunization and the following day.
• PBS complete Freund's adjuvant
• pertussis toxin in PBS 100 ng/mouse
• mice were scored daily for disease severity on the basis of the following scale: 0, no clinical disease; 0.5, tail weakness; 1, tail paralysis; 2, hindlimb weakness; 3, hindlimb paralysis; 3.5, forelimb weakness; 4, forelimb paralysis; or 5, moribund or death.
• IL- 10 /_ x TLR-4 (DKO) mice were kindly provided by Cathyn Nagler (The University of Chicago). The DKO mice develop colitis spontaneously and exhibit a high incidence of rectal prolapses. At 29 weeks of age when the first sign of rectal prolapse appeared, the mice were used as IBD-developed mice for imaging analysis. As a control of non-developed IBD, DKO mice at 16 weeks of age and genetic background strain (C57BL/6) mice were used.
• Nonobese diabetic (NOD) mice is known as a spontaneous model of T-cell mediated autoimmune insulin-dependent diabetes mellitus (37, 38).
• Cyclophosphamide can promote the onset of diabetes in NOD mice (39).
• Balb/c mouse was used as a non diabetic control, naturally developed diabetic NOD mouse, and diabetic mouse accelerated by intraperitoneal injection of cyclophosphamide (Sigma-Aldrich) at 300 mg/kg. Blood glucose level was used as an index of diabetes development.
• Paraffin-embedded joint tissues from CAIA mice and colon from IBD-developed mice were sliced at 5 pm thickness and stained with H&E and/or PAS for pathological analysis.
• the severity of synovial hyperplasia and bone resorption for the arthritis model was scored by three-grade evaluation (0-2) according to the previously reported criteria with slight modifications as follows: 0, normal to minimal infiltration of pannus in cartilage and subchondral bone of marginal zone; 1, mild to moderate infiltration of marginal zone with minor cortical and medullary bone destruction; 2, severe infiltration associated with total or near total destruction of joint architecture.
• the scores in both hind paws were summed up for each mouse (score per mouse total, 0-4).
• Immunohistostaining was performed according to standard procedures. Briefly, the sections were incubated in 0.3% H2O2 for 20 min, blocked with PBS-buffered 1% BSA for 1 hour, and incubated overnight at 4 °C with HRP-conjugated anti-rat IgG (Jackson ImmunoResearch) for 1 hour at room temperature and visualized with diaminobenzidine.
• T-DM1 Ado-trastuzumab Emtansine
• ADC antibody-drug conjugate
• Example 2 Enhanced Lymph Node Trafficking of Engineered IL-10 Suppresses Murine Models of Rheumatoid Arthritis
• RA Rheumatoid arthritis
• IL-10 interleukin- 10
• SA-IL-10 and CBD-SA-IL-10 exhibited longer circulation times than unmodified IL-10 after intravenous injection; moreover, SA fusion led to enhanced lymph node (LN) accumulation compared with unmodified IL-10.
• Intravenous SA-IL-10 and CBD-SA-IL-10 treatment restored immune cell composition in the paws to a normal status, elevated the frequency of suppressive M2 macrophages, and protected joint morphology.
• Intravenous SA-IL-10 and CBD-SA-IL-10 showed similar efficacy as treatment with an anti-TNF-a antibody.
• SA fusion to IL-10 is a simple but effective engineering strategy to achieve LN accumulation and control of RA.
• Rheumatoid arthritis is an autoimmune disease that is currently controlled through treatment with inhibitors of inflammatory pathways. Pathological features of RA are synovitis and joint destruction, which cause severe pain and joint dysfunction (7, 2). Although the causal antigen for RA has not been fully elucidated, collagen recognition by immune cells plays a key role. During progression of RA, autoantigen-specific T cells, especially Thl7 cells, are activated and produce inflammatory cytokines including IL-17. Inflammatory cytokines, such as TNF-a and IL-6, in the joint induce activation of macrophages and neutrophils as mediators of the inflammatory response.
• IL-10 is one such anti-inflammatory cytokine (5-7), and various attempts have been performed to explore IL-10-based autoimmune disease therapeutics (6-8).
• IL-10-based autoimmune disease therapeutics (6-8).
• the therapeutic effect of IL-10 in autoimmune disease is still controversial, possibly because of its short circulating half-life and its uncontrolled biodistribution after systemic administration (5).
• the inventors engineered IL-10 by fusion of serum albumin (SA) to provide prolonged blood circulation and by fusion of a collagen binding domain (CBD) to provide binding affinity to the inflamed site where the permeability of blood vessels is enhanced and extracellular matrix proteins including collagens are exposed to proteins from the blood (16, 17).
• SA serum albumin
• CBD collagen binding domain
• the inventors reasoned that CBD-fusion to SA would add inflammatory site targeting to the SA-fused cytokine.
• the inventors sought to explore if enhanced blood circulation and disease site vasculature targeting synergizes to improve IL-lO’s therapeutic effects on RA.
• Wild type (wt) mouse IL-10, SA-fused mouse IL-10, and CBD-SA-fused IL-10 were recombinantly expressed, and the molecular weights of the fusion proteins were correspondingly higher than for wt IL-10 as determined by SDS-PAGE; in addition, most of the SA-IL-10 and CBD-SA-IL-10 existed as a monomer under non-reducing conditions (FIG. 8A and 14A).
• SPR surface plasmon resonance
• CBD-SA-IL-10 was shown to bind type I and type III collagens with nanomolar order of Kd (FIG. 14B).
• SA-fused IL-10 exhibited high binding to macrophages and dendritic cells in both splenocytes and LN- derived cells.
• fluorescently-labeled SA-IL-10 significantly higher fluorescence signals were observed within the popliteal LN compared with wt IL-10 (FIG. 8D).
• higher fluorescence signals were located surrounding high endothelial venules (HEVs), where antigen presenting cells (APCs) reside (18).
• HEVs high endothelial venules
• APCs antigen presenting cells
• SA is known to demonstrate long circulation via FcRn-mediated recycling on vascular endothelial cells (19, 20).
• SA-IL-10 showed significantly prolonged blood circulation compared with wt IL-10; CBD-SA-IL-10 had also comparable circulation as SA-IL-10 (FIG. 9A).
• FIG. 9B represents the fluorescence signals from major organs of mice intravenously injected with DyLight800-labled proteins. Reflecting their long circulation properties, SA-IL-10 and CBD-SA-IL-10 showed higher signals in the heart, lungs and spleen than that of wt IL-10.
• FIG. 10 The therapeutic effects of engineered IL-10 in the passive collagen antibody-induced arthritis (CAIA) model were evaluated (FIG. 10). Intravenous injection of SA-IL-10 or CBD- SA-IL-10 significantly suppressed the development of arthritis, whereas PBS- or wt IL-10- injected mice exhibited severe inflammation in the paws (FIG. 10A).
• the therapeutic effect of CBD-SA-IL-10 was compared with treatment with anti-TNF-a antibody (aTNF-a), a mouse model of a clinically used antibody drug for treatment of RA, where CBD-SA-IL-10 induced comparable suppression of CAIA as aTNF-a (FIG. 10B).
• FIG. IOC Histological analysis revealed that both CBD-SA-IL-10 and aTNF-a suppressed joint destruction compared with PBS- or wt IL- 10 treatment. Histological scores also significantly decreased due to treatment with CBD-SA-IL-10 and aTNF-a (FIG. IOC).
• the effect of the administration route on therapeutic efficacy was also investigated, comparing intravenous, local (footpad), and subcutaneous (at a distant site, mid-back) administration (FIG. 10D). Footpad injection of CBD-SA-IL-10 induced a relatively high suppression effect on CAIA compared with the results of its intravenous injection shown in FIG. 10A and FIG.
• SA-fused IL-10 showed micromolar affinity to FcRn (FIG. 8B) and accumulation within LNs after intravenous injection (FIG. 8D).
• the amounts of IL-10 and its pharmacokinetics in the LNs were quantitatively evaluated (FIG. 12A-C).
• IL-10 concentrations in the LNs at various time points were detected using ELISA.
• SA-IL-10 showed significantly higher IL-10 signals in the joint-draining (popliteal) LN, the mesenteric LN and relatively high signals in a non-draining (cervical) LN compared with wt IL-10 and CBD-SA-IL-10 at 4 hr after injection, and CBD-SA-IL-10 showed higher accumulation than wt IL-10 (FIG. 12A).
• SA-IL-10-injected mice also showed a peak for IL-10 concentration at around 1 hour after injection (FIG. 12B) and 5-10 times higher AUC than wt IL-10 in the LNs (FIG. 12C).
• the inventors measured Thl7-relating cytokines (IL-17, IL-6 and TGF-b) in the LNs in the joint-draining (popliteal) and a non draining (cervical) LN: compared to treatment with wt IL-10, IL-17 was statistically reduced in the popliteal LN after treatment by SA-IL-10, but not statistically by CBD-SA-IL-10, and levels in the cervical LN were not statistically reduced by either IL-10 variant (FIG. 12D and 12E). Treatment by SA-IL-10 reduced the concentration of GM-CSF in the popliteal LN, whereas wt IL-10 did not (FIG. 12F).
• IL-10 is a representative anti-inflammatory cytokine and modulates the phenotypes of RA-relating immune cells toward immunosuppressive states.
• Clinical trials using recombinant IL-10 have been already performed to treat autoimmune diseases including RA (6-8, 29).
• One of the drawbacks of IL-10 is its short half-life in the blood (8).
• the inventors genetically fused SA to IL-10 to extend its retention in the blood and moreover in the secondary lymphoid organs.
• the inventors genetically fused a CBD derived from the blood protein von Willebrand Factor (16, 17).
• CAIA is a macrophage- and neutrophil-mediated acute RA model
• CIA is a T cell-, and especially Thl7-mediated RA model.
• RA is a heterogeneous disease in the clinic and the models complement each other, it is encouraging to show and SA-fused IL- 10 suppresses disease severity in both models.
• SA fusion to IL-10 resulted in enhanced accumulation within LNs after intravenous injection and kept high IL-10 concentrations in the LNs for prolonged durations compared with wt IL-10 (FIG. 12 A). So far, LN trafficking of SA or albumin-binding nanoparticles has been mainly achieved by intradermal or subcutaneous administration, where the LN is accessed via the afferent lymphatic vessel downstream of the collecting lymphatics at the injection site (20- 33).
• SA-IL-10 shows high binding to APCs (FIG. 8B). After accumulation within the LNs, SA-IL-10 molecules are taken up by APCs resident within the LNs, leading to the suppression of dendritic cell and Ml macrophage activities and the induction of M2 macrophages (FIG. 15). M2 macrophages can change the differentiation fate of ThO cells to Treg cells in the LNs (35).
• the immunosuppressive environment by high concentrations of IL-10 in the LN may cause the further polarization of macrophages to M2 phenotype and the suppression of Thl7 differentiation ⁇ 36, 37), resulting in the decrease of IL- 17, GM-CSF or other cytokines in the LNs that the inventors observed (FIG. 12D and 12F).
• GM-CSF is a cytokine that is a marker for pathogenic Thl7, and its inhibitory antibody is currently being tested in clinical trials ⁇ 38).
• SA-IL-10 treatment indicates decreased immuno-activation in the joint-draining LN.
• Thl7 cells reportedly express IL-10 receptor, and IL-10 binding suppresses IL-17 expression and secretion ⁇ 14, 36). Because Thl7 cell antigen recognition primarily occurs in the lymphoid tissue, SA-IL-10 may bind to Thl7 cells directly to suppress the IL-17 pathway. These changes in LNs also suppressed the infiltration of immune cells, especially G-MDSC and macrophages, into the paws (FIG. 13 A) and also induced an increase of M2 macrophages (FIG. 13 A), resulting in the decrease of inflammatory cytokines (FIG. 13B) and the suppression of joint inflammation (FIG. 10, 11, and 13C).
• SA-IL-10 induced high anti-inflammatory responses after administration by any of the routes tested, namely intravenous, subcutaneous (at a distant site) or footpad (local) injections, suggesting that SA-IL-10 can enter the LNs systemically after uptake by a local injection-site draining lymphatics and transit through the lymphatics back into the systemic circulation via the thoracic duct.
• the high therapeutic effect by subcutaneous injection suggests a particular clinical benefit of SA-IL-10.
• Intravenous CBD-SA-IL-10 also shows suppression effects on the development of CAIA and CIA that are comparable to anti-TNF-a antibody, which is the current standard biological therapeutic for RA.
• CBD-SA-IL-10 the therapeutic effects of CBD-SA-IL-10 are lower than that observed with SA-IL-10, which corresponds to lower LN trafficking of CBD-SA-IL-10 (FIG. 12A).
• CBD-SA-IL-10 might bind to collagens in inflamed tissues after permeation there, which causes the accumulation to inflamed paws (FIG. 9B), but such collagen affinity may interfere the LN trafficking of CBD-SA-IL-10 ⁇ 16, 39). Therefore, SA-fusion is a simple but effective way for preparation of engineered cytokines to achieve enhanced LN trafficking.
• This study was designed to test the strategy of targeting anti-inflammatory cytokines to LNs through engineered affinity for FcRn. Specifically, the inventors tested whether LN targeting of the anti-inflammatory cytokine IL-10 by serum albumin fusion is superior to nontargeted wt IL-10 and currently available anti-inflammatory antibody therapeutics (aTNF- a) in mouse models of RA. To evaluate the efficacy of wt IL-10, SA-IL-10 and anti-TNF-a antibody, the inventors scored arthritic symptoms and joint histology in both the passive CAIA model and the active CIA model.
• the inventors also measured biodistribution and LN trafficking, immune responses within LNs and paws, and various aspects of toxicity after treatment. Statistical methods were not used to predetermine necessary sample size, but sample sizes were chosen on the basis of estimates from pilot experiments so that appropriate statistical tests could yield statistically significant results. Production of wt IL-10, SA-IL-10 and CBD- SA-IL-10 was performed by multiple individuals to ensure reproducibility. All experiments were replicated at least twice. For animal studies, mice were randomized into treatment groups within a cage immediately before the first drug injection and treated in the same manner. The n values used to calculate statistics are indicated in the figure legends. Drug administration and pathological analyses were performed in a blinded fashion. Statistical methods are described in the“Statistical Analysis” section.
• protein was eluted with a gradient of 500 mM imidazole (in 20 mM NaH2P04, 0.5 M NaCl, pH 8.0).
• the protein was further purified with size exclusion chromatography using a HiLoad Superdex 200PG column (GE Healthcare) using PBS as an eluent. All purification steps were carried out at 4°C. The expression of the proteins was verified as >90% pure by SDS-PAGE. Purified proteins were tested for endotoxin via HEK- Blue TLR4 reporter cell line and endotoxin levels were confirmed to be less than 0.01 EU/mL. Protein concentration was determined through absorbance at 280 nm using NanoDrop (Thermo Scientific).
• mice at 7 wk of age and DBA/1J male mice at 8 wk of age were obtained from the Jackson Laboratory. Experiments were performed with approval from the Institutional Animal Care and Use Committee of the University of Chicago.
• mice were intravenously, subcutaneously (mid-back), or via footpad injected with PBS, wt IL-10, SA-IL-10, CBD-SA- IL-10 (each equivalent to 43.5 pg of IL-10), or 200 pg of Rat anti-mouse TNF-a antibody (clone XT3.11, Bio X Cell) before LPS injection.
• Joint swelling was scored every day according to the manufacture’s protocol (Chondrex). On the last day of scoring, the hind paws were fixed in 10% neutral formalin (Sigma- Aldrich), decalcified in Decal cifer II (Leica), and then provided for histological analysis.
• Paraffin-embedded paws were sliced at 5 pm thickness and stained with H&E. The images were scanned with a Pannoramic digital slide scanner and analyzed using a Pannoramic Viewer software. The severity of synovial hyperplasia and bone resorption for the arthritis model was scored by three-grade evaluation (0-2) according to the previously reported criteria with slight modifications as follows: 0, normal to minimal infiltration of pannus in cartilage and subchondral bone of marginal zone; 1, mild to moderate infiltration of marginal zone with minor cortical and medullary bone destruction; 2, severe infiltration associated with total or near total destruction of joint architecture. The scores in both hind paws were summed for each mouse (score per mouse total, 0-4). The histopathological analyses were performed in a blinded fashion.
• mice Male DBA/1J mice (8 wk old) were immunized by subcutaneous injection at the base of the tail with bovine collagen/complete Freund’s adjuvant (CFA) emulsion (Hooke Kit, Hooke Laboratories). Three weeks later, a booster injection of bovine collagen/incomplete Freund’s adjuvant (IF A) emulsion (Hooke Kit, Hooke Laboratories) was performed. After the booster injection, mice were inspected every day, and joint swelling was scored according to the manufacture’s protocol (Hooke Laboratories).
• CFA bovine collagen/complete Freund’s adjuvant
• IF A bovine collagen/incomplete Freund’s adjuvant
• mice When showing total score of 2-4 (defined as Day 0), mice were intravenously injected with PBS, SA-IL-10, CBD-SA-IL-10 (each equivalent to 43.5 pg of IL-10), or 200 pg of Rat anti-mouse TNF-a antibody (clone XT3.11, Bio X Cell). On the last day of scoring, hind paws were collected and histological analyses were employed as described above. 9. In vivo bio-distribution study
• wt IL-10, SA-IL-10 and CBD-SA-IL-10 were incubated with 8-fold molar excess of using DyLight 800 NHS ester (Thermo Fisher) for 1 hr at room temperature, and unreacted dye was removed by a Zebaspin spin column (Thermo Fisher) according to the manufacturer’s instruction.
• BALB/c mice were intraperitoneal injected by anti-collagen antibody cocktail (1.0 mg/mouse) on day 0, subsequently 10 pg of LPS was injected to right hind paw on day 3. The following day, 20 pg of DyLight 800-labeled proteins were intravenously injected.
• organs harvested from the disease model were imaged with the Xenogen IVIS Imaging System 100 (Xenogen) under the following conditions: f/stop: 2; optical filter excitation 745 nm; excitation 800 nm; exposure time: 5 sec; small binning. Each organ was weighed to normalize the fluorescence signal from each organ.
• mice were intravenously injected with DyLight594-labeled wt IL-10 (43.5 pg) or SA-IL-10 labeled with equimolar amounts of dye.
• popliteal LNs were harvested and frozen in dry ice with optimal cutting temperature (OCT) compound.
• OCT optimal cutting temperature
• Tissue slices (10 pm) were obtained by cryo-sectioning. The tissues were fixed with 2% paraformaldehyde in PBS for 15 min at room temperature. After washing with PBS-T, the tissues were blocked with 2% BSA in PBS-T for 1 hr at room temperature.
• the tissues were stained with anti-mouse CD3 antibody (1 : 100, 145-2C11, BioLegend) or anti-mouse peripheral node addressin (PNAd) antibody (1 :200, MECA79, BioLegend) and Alexa Fluor 488 donkey anti-rat (1 :400, Jackson ImmunoResearch).
• the tissues were washed three times and then covered with ProLong gold antifade mountant with 4',6-diamidino-2-phenylindole (DAPI; Thermo Fisher Scientific).
• An 1X83 microscope (Olympus) was used for imaging with lOx magnification for CD3 staining, and a Leica SP8 3D Laser Scanning Confocal microscope with 20x magnification for PNAd staining. Images were processed using ImageJ software (NIH).
• wt IL-10, SA-IL-10 or CBD-SA-IL-10 (each equivalent to 35 pg of IL-10) was injected intravenously into CAIA mice.
• Popliteal, mesenteric, cervical LNs were collected at 30 min, and 1, 4, 8 and 24 hr after injection, and were subsequently homogenized using Lysing Matrix D and FastPrep-24 5G (MP Biomedical) for 40 s at 5000 beats/min in T-PER tissue protein extraction reagent (Thermo Scientific) with cOmpleteTM proteinase inhibitor cocktail (Roche). After homogenization, samples were incubated overnight at 4°C.
• CAIA mice were intravenously injected with PBS, wt IL-10, SA-IL-10 or CBD-SA- IL-10 (each equivalent to 43.5 pg of IL-10). Eight days after, blood and hind paws were harvested. Red blood cells in blood were lysed with ACK lysing buffer (Quality Biological), followed by antibody staining for flow cytometry. Paws were digested in Dulbecco's Modified Eagle Medium (DMEM) supplemented with 2% FBS, 2 mg/mL collagenase D and 40 pg/mL DNase I (Roche) for 60 min at 37°C. Single-cell suspensions were obtained by gently disrupting through a 70-pm cell strainer.
• DMEM Dulbecco's Modified Eagle Medium
• Antibodies against the following molecules were used: anti-mouse CD3 (145-2C11, BD Biosciences), CD4 (RM4-5, BD Biosciences), anti mouse CD8a (53-6.7, BD Biosciences), anti-mouse CD25 (PC61, BD Biosciences), anti mouse CD45 (30-F11, BD Biosciences), CD44 (IM7, BD Biosciences), CD62L (MEL- 14, BD Biosciences), PD-1 (29F.1A12, BD Biosciences), NK1.1 (PK136, BD Biosciences), Foxp3 (MF23, BD Biosciences), F4/80 (T45-2342, BD Biosciences), MHC II (M5/114.15.2, BioLegend), CD206 (C068C2, BioLegend), Ly6G (1A8, BioLegend), Ly6C (HK1.4, BioLegend), CDl lb (Ml/70, BioLegend), CDl lc (HL3, BD Bioscience
• Fixable live/dead cell discrimination was performed using Fixable Viability Dye eFluor 455 (eBioscience) according to the manufacturer’s instructions. Staining was carried out on ice for 20 min if not indicated otherwise, and intracellular staining was performed using the Foxp3 staining kit according to manufacturer’s instructions (BioLegend). Following a washing step, cells were stained with specific antibodies for 20 min on ice prior to fixation. All flow cytometric analyses were done using a Fortessa (BD Biosciences) flow cytometer and analyzed using FlowJo software (Tree Star).
• mice were intravenously injected with PBS, wt IL-10, SA-IL-10 or CBD- SA-IL-10 (each equivalent to 43.5 pg of IL-10).
• PBS wt IL-10
• SA-IL-10 wt IL-10
• CBD- SA-IL-10 each equivalent to 43.5 pg of IL-10.
• blood samples collected from mice were analyzed using a COULTER Ac*T 5diff CP hematology analyzer (Beckman Coulter) according to the manufacturer’s instructions. Spleen weight was also measured. Serum samples collected from protein-injected mice were analyzed using Biochemistry Analyzer (Alfa Wassermann Diagnostic Technologies) according to the manufacturer’s instructions.
• Thl7 cells express interleukin- 10 receptor and are controlled by Foxp3 and Foxp3 + regulatory CD4 + T cells in an interleukin- 10-dependent manner. Immunity 34, 554-565 (2011).
• Example 3 Prolonged residence of albumin-fused IL-4 in the secondary lymphoid organs via FcRn ameliorates experimental autoimmune encephalomyelitis
• MS Multiple sclerosis
• IL-4 interleukin-4
• EAE experimental autoimmune encephalomyelitis
• SA-IL-4 SA-IL-4
• SLOs secondary lymphoid organs
• SA-IL-4 showed greater accumulation and residence time in lymph nodes (LNs) and spleen compared to wild-type (wt) IL-4 via neonatal Fc receptor (FcRn) binding.
• SA-IL-4 prevented EAE disease development in all mice and demonstrated higher therapeutic efficacy compared to FTY720 and wt IL-4.
• SA-IL-4 prevented immune cell infiltration into the spinal cord, facilitating maintenance of spinal cord structure and resulting neurological function.
• SA-IL-4 decreased integrin expression in antigen-reactive CD4 + T cells, indicating impaired cell migration capability.
• SA- IL-4 increased the number of and programmed death ligand- 1 expression on granulocyte-like myeloid-derived suppressor cells, a key EAE disease suppressor, in the spinal cord-draining LN (dLN).
• SA-IL-4 decreased the number of Thl7 cells, a pathogenic cell population for EAE disease.
• SA-IL-4 In the chronic phase of EAE, SA-IL-4 also showed marked therapeutic effects, accompanied by inhibition of immune cell infiltration into the spinal cord and complete abrogation of immune response to the myelin antigen in the spleen.
• Engineered SA-IL-4 demonstrates translational promise for MS as both a preventative and therapeutic treatment via accumulation in SLOs.
• MS Multiple sclerosis
• CNS central nervous system
• Lymphocytes and macrophages that have infiltrated into the CNS cause axonal damage.
• SLOs secondary lymphoid organs
• FTY720 and anti-integrin a.4 antibody are used in the clinic to inhibit lymphocyte migration (3,4).
• Experimental autoimmune encephalomyelitis (EAE) is a widely accepted murine model of MS, reflecting many features of disease progression and developmental mechanism, including lymphocyte migration to the CNS and demyelination.
• SA-IL-4 binds to immune cells and inhibits Thl7 differentiation
• the inventors have recombinantly expressed wild-type (wt) mouse IL-4 and mouse SA-fused mouse IL-4 (FIG. 18 A). SDS-PAGE revealed that the molecular size was increased by SA fusion to IL-4. When added to freshly isolated immune cells from LN and spleen, SA- IL4 preferentially bound to antigen presenting cells (APCs), such as macrophages and dendritic cells (DCs) in vitro, compared to other immune cells (FIG. 18B).
• APCs antigen presenting cells
• DCs dendritic cells
• IL-4 receptor is expressed on T cells when stimulated (12).
• SA-IL-4 induced downstream phosphorylation of STAT6 in T cells with 32 times higher EC50 than wt IL-4. This suggests that wt IL-4 is more active than SA-IL-4 in vitro (FIG. 18C).
• the inventors found that both wt IL-4 and SA-IL-4 inhibit Thl7 differentiation of naive CD4 + T cells cultured in Thl7 cell differentiation media (FIG. 18D). Taken together, the results demonstrate that the inventors successfully made functionally active SA-IL-4 fusion protein.
• SA-IL-4 increases blood half-life and persistence in the SLOs, both in LNs and spleen
• SA-IL-4 binds to FcRn with a dissociation constant (KD) of 385 nM (FIG. 19A).
• KD dissociation constant
• FIG. 19B Plasma half-life after intravenous (i.v.) injection of SA-IL-4 was extended remarkably in contrast to wt IL-4, which was cleared from plasma within a few minutes (FIG. 19B).
• the inventors next tested if i.v. -injected SA-IL-4 accumulates in the spleen and LN using naive mice.
• SA-IL-4 substantially increased the amount of IL-4 in both the lumbar and brachial LNs and in the spleen after i.v. injection (Fig. 2cd).
• Fluorescence-based biodistribution analysis also showed enhanced SA-IL-4 accumulation in the lumbar LN compared to wt IL-4 (FIG. 24).
• the inventors made a P573K point mutation of SA in the fusion to IL-4, which abolishes FcRn binding (FIG. 25A) (13).
• the SA(P573K) mutation decreased the IL-4 amount in the LN compared to SA-IL-4, down to a similar level as wt IL-4 (FIG. 19E).
• SA(P573K)-IL-4 has a longer blood half-life compared to wt IL-4 due to an increase in molecular size, but shorter than SA-IL-4 due to impaired FcRn binding (FIG. 25B). Taken together, these data suggest that SA trafficking to the LN requires FcRn binding.
• the inventors further compared the therapeutic effect of SA-IL-4 with FTY720, a clinically approved drug (fmgolimod) for treating MS that sequesters lymphocytes in the LNs and prevents them from reacting with autoantigens in target tissues (3).
• FTY720 a clinically approved drug for treating MS that sequesters lymphocytes in the LNs and prevents them from reacting with autoantigens in target tissues (3).
• Subcutaneous injection of SA-IL-4 completely suppressed disease development in all mice (FIG. 20A,B) ⁇ SA-IL-4 injected i.p. and FTY720 prevented EAE development in 4 of 7 mice and suppressed disease severity in the rest.
• Wt IL-4 treatment did not show EAE clinical score suppression compared to the PBS treated group, all of which mice developed disease.
• mice treated with PBS and wt IL-4 were observed to markedly lose weight (FIG. 20C).
• Mice injected s.c. with SA-IL-4 gained their weight more than all other groups, indicating good health.
• the i.p. SA-IL-4 group gained weight on average, while FTY720 treated mice maintained their body weight.
• the inventors next analyzed demyelination of the spinal cord, which is the main morphological manifestation of EAE disease (FIG. 20D).
• mice injected s.c. with SA-IL-4 did not have any detectable demyelination, demonstrating prevention of damage in the spinal cord. All wt IL-4- treated mice showed demyelination.
• mice were then monitored mice long-term, until day 24, where SA-IL-4 i.p. injection inhibited disease development and progression (FIG 26). Importantly, SA(P573K)-IL-4 did not suppress disease score (FIG. 27). These data suggest that SA fusion to IL-4 strongly improves the therapeutic effects of IL-4 on EAE disease suppression.
• SA-IL-4 treatment suppresses immune cell infiltration into the spinal cord and induces an immune-suppressive environment in the dLN
• the inventors then analyzed immune cells in the lumbar dLN.
• SA-IL-4 increased granulocyte-like myeloid-derived suppressor cells (G-MDSCs), but reduced monocyte-like MDSCs (M-MDSCs) (FIG. 21C,D).
• G-MDSCs granulocyte-like myeloid-derived suppressor cells
• M-MDSCs monocyte-like MDSCs
• the frequency of Thl7 cells within CD4 + T cells in the dLN was also reduced by SA-IL-4 treatment (both i.p. and s.c.), compared to FTY720 treatment (FIG. 21E).
• FTY720 treatment trended to increase Thl7 cell frequency in the dLN compared to PBS group, probably because FTY720 inhibits lymphocyte egress from LNs.
• SA-IL-4 treatment reduced the frequency of Ml macrophages and increased M2 macrophages in the dLN (FIG. 21F). Wt IL-4 did not decrease the frequency of Ml macrophages but increased M2 macrophages.
• the frequency of macrophages within CD1 lb + cells was maintained (FIG. 28 A), as well as the frequency of DCs within CD45 + cells (supplementary fig. 4b).
• B cells reportedly promote induction of EAE by facilitating reactivation of T cells (14).
• SA-IL-4 (s.c.) decreased the frequency of B cells compared to both PBS and FTY720 treatment groups (FIG. 21H).
• the inventors next analyzed the molecular mechanisms of decreased immune cell infiltration in the spinal cord and of the complete EAE disease prevention by s.c. injection of SA-IL-4.
• the inventors found that the number of MOG35-55-reacting T cells in the dLN was maintained in all treatment groups, suggesting that SA-IL-4 does not change antigen recognition (FIG. 22A).
• the inventors hypothesized that SA-IL-4 changes T cell functionality.
• the inventors first tested the migratory ability of T cells. Expression levels of aEb2 and a4b1 integrins, crucial adhesion molecules for lymphocytes migration (15), are reportedly decreased by IL-4 (16).
• the inventors then tested PD-1 expression on T cells and PD-L1 expression on MDSCs (FIG. 22F-K), as PD-1 and PD-L1 association suppresses T cell activation (17). Strikingly, SA-IL-4 but not wt IL-4 increased the expression of PD-1 on both central memory CD4 + T cells and central memory CD8 + T cells (FIG. 22F,G). Moreover, SA-IL-4 but not wt IL-4 increased the expression levels of PD-L1 and the frequency of PD-L1 -expressing cells on both M-MDSCs and G-MDSCs (FIG. 22H-K). These data suggest T cell suppression may be induced through MDSCs and the PD-1/PD-L1 axis.
• IL-23 is a crucial cytokine for Thl7 functionality.
• IL-4 reportedly binds to APCs and silences IL-23 and concordant Thl7 differentiation (18).
• SA-IL-4 treatment decreases the frequency of IL-23R + cells within the MOG35-55-reactive T cell repertoire (FIG. 22L).
• FIG. 22M,N ELISA of culture supernatant revealed a decrease in IL-17A expression with SA-IL-4 treatment, but not wt IL-4 treatment, compared to PBS (FIG. 22M).
• the reduction in IL-17 expression implies a decreased number and/or level of activity of MOG35-55-reactive Thl7 cells in the SA- IL-4 treated group.
• the IFNy concentration was maintained, suggesting little effect of SA-IL- 4 on Thl cells (FIG. 22N).
• SA-IL-4 trended toward a decreased level of GM-CSF, a reportedly pathogenic cytokine for EAE (19) (FIG. 220).
• the inventors then tested cytokine expression within T cells by flow cytometry after MOG35-55 peptide re-stimulation of splenocytes (FIG. 22P).
• the inventors analyzed GM-CSF, IL-17, IFNy and TNFa, all pathogenic cytokines for EAE.
• SA-IL-4 decreased the frequency of cytokine-expressing cells within the CD4 + T cell compartment, compared to other treatments. These results strongly suggest that Thl 7 cells in the SA-IL-4-treated mice are fewer and less pathogenic compared to other treatment groups.
• SA-IL-4 modulates multiple immune cell responses in the SLOs and suppresses EAE disease development through preventing immune cell infiltration, especially T cell infiltration, into the spinal cord.
• the inventors then tested immune cell infiltration into the spinal cord at day 34 after induction by flow cytometry (FIG. 23E-G).
• SA-IL-4 and FTY720 treatment decreased the number of spinal cord infiltrated immune cells, including CD4 + T cells and MOG35-55-reactive Thl7 cells, compared to PBS and wt IL-4 treatment.
• SA-IL-4 decreased IL-23R expressing cells within MOG35-55-reactive CD4 + T cells in the spleen compared to other treatment groups (FIG. 23H).
• splenocyte re-stimulation with MOG protein was performed.
• the inventors seek to explore a therapy that could sculpt the immune response away from the Thl7 pathway that is known to be involved in the pathology of the disease, toward a more tolerogenic phenotype using IL-4, without adverse effects.
• the inventors utilized a molecular engineering approach to target IL-4 to the SLOs to ameliorate the underlying autoimmune response to myelin antigens.
• G- MDSCs express PD-L1 to induce functional suppression of T cells.
• M- MDSCs were decreased by SA-IL-4 treatment.
• the role of M-MDSCs on EAE is controversial, and a pathogenic effect has been reported (25).
• SA-IL-4 but not wt IL-4 enhanced expression of PD-L1 on both G- and M-MDSCs in the SLOs.
• SA-IL-4 but not wt IL-4 enhanced expression of PD-1 on both CD4 + and CD8 + central memory T cells in the SLOs.
• this PD-1/PD-L1 induction effect is the mechanism through which MDSCs in the SA-IL-4 treated mice suppress pathogenic T cells, and the observation of this phenomenon in the SLOs attests to the value of the SLO-targeting capability conferred by SA fusion.
• Thl7 cells play a crucial role in EAE disease severity and development (26).
• SA-IL- 4 treatment reduced the frequency of Thl7 cells in the dLN, compared to FTY720 treatment.
• IL-4 directly inhibits naive T cell differentiation into Thl7 cells, as the inventors have shown in FIG. 18D. Additionally, there is a possible Thl7 inhibition pathway mediated through APCs.
• IL-23 is expressed by APCs (26) and generates pathogenic Thl7 cells and induces expression of IL-17 (27).
• IL-4 reportedly reduces expression of IL-17 through silencing of IL-23 in APCs (18).
• SA-IL-4 acts on APCs to decrease IL-23 expression, thereby blocking generation of pathogenic Thl7 cells in the SLOs.
• This model agrees with the inventors’ data that SA-IL-4 decreases GM-CSF + -mediated T cell pathogenicity, as GM-CSF + is a marker for pathogenic Thl7 cells.
• FTY720 is one of the FDA-approved drugs against MS, functioning through induction of lymphocytopenia and thus limiting migration of effector lymphocytes to the CNS disease site.
• Subcutaneously administered SA-IL-4 showed higher efficacy than FTY720 in this study. This improvement with SA-IL-4 is strong evidence for its potential for clinical translation.
• FTY720 has the drawback that it cannot be administered to infected patients.
• induction of John Cunningham virus (JCV) activity can lead to progressive multifocal leukoencephalopathy (PML) which can ultimately cause severe adverse events including death.
• SA-IL-4 decreased integrin expression only on the antigen-reactive CD4 + T cells, but not CD8 + T cells. This suggests that SA-IL-4 has additional migratory inhibitory effects on antigen-reactive CD4 + T cells, which may contribute to inflammation suppression in the spinal cord.
• the hematology study showed that SA-IL-4 did not induce lymphocytopenia. This may be an additional advantage over approved drugs, as SA-IL-4 is not expected to strongly suppress the immune response against infectious diseases, and thus it may be that SA-IL-4 may be useful for patients who are not amenable to treatment with FTY720. SA-IL-4 likely suppresses autoimmunity through various mechanisms that are not redundant with current therapeutics. In this study, FTY720 did not suppress Thl7 development in the dLN, while SA-IL-4 did. Thus, SA-IL-4 may be useful for patients who do not obtain sufficient therapeutic effects with current treatments.
• the SA fused cytokine can be collected by one immune cell and recycled by that cell to stimulate another immune cell.
• blood circulation lifetimes are not directly related to SLO presence lifetimes.
• the inventors believe that this biological finding can open a new research field of LN molecular trafficking, and further research will clarify the detailed mechanisms.
• SA-IL-4 exhibited therapeutic efficacy in the chronic phase of EAE. Nasal or lumbar administration of IL-4 has been previously reported to lead to direct binding of IL-4 to neurons, in attempts to regenerate the nervous system in EAE (9). The therapeutic effect of i.p. -injected SA-IL-4 was comparable to nasally administered wt IL-4 in the previous report. This suggests that SA-IL-4 may also bind to neurons and induce regeneration. Because the blood brain barrier is disrupted in the EAE model, SA-IL-4 may have access to neurons within the spinal cord. It will be interesting to study the direct effect of SA-IL-4 on neural regeneration in future research.
• SA-IL-4 demonstrated persistence in SLOs through FcRn binding.
• SA-IL-4 displayed marked therapeutic effects on multiple phases of EAE after systemic injection, and it modulates key immune pathways of EAE, such as decreasing Thl7 cells and increasing G-MDSCs and PD-L1 expression by MDSCs in SLOs.
• SA-IL-4 holds translational potential in both preventative and therapeutic usage through a novel biologic approach utilizing mechanisms that are different from currently approved therapies.
• mice SA without pro-peptide 25 to 608 amino acids of whole serum albumin
• mouse IL-4 mouse IL-4
• a (GGGS)2 linker was synthesized and subcloned into the mammalian expression vector pcDNA3.1(+) by Genscript.
• a sequence encoding for 6 His was added at the C-terminus for further purification of the recombinant protein.
• the amino acid sequence of the protein is shown in the supplemental table 1.
• Suspension-adapted HEK- 293F cells were routinely maintained in serum-free FreeStyle 293 Expression Medium (Gibco). On the day of transfection, cells were inoculated into fresh medium at a density of 1 c 10 6 cells/ml.
• protein was eluted with a gradient of 500 mM imidazole (in 20 mM NaftPCri, 0.5 M NaCl, pH 8.0).
• the protein was further purified by size exclusion chromatography using a HiLoad Superdex 200PG column (GE Healthcare) using PBS as an eluent. All purification steps were carried out at 4°C.
• the expressed proteins were verified as >90% pure by SDS-PAGE. Purified proteins were tested for endotoxin via the HEK-Blue TLR4 reporter cell line, and endotoxin levels were confirmed to be less than 0.01 EU/ml. Protein concentration was determined through absorbance at 280 nm using NanoDrop (Thermo Scientific).
• mice were housed at the University of Chicago Animal facility for at least 1 week before immunization. All experiments were performed with approval from the Institutional Animal Care and Use Committee of the University of Chicago.
• Single-cell suspensions were obtained by gently disrupting the spleen or popliteal lymph node through a 70-pm cell strainer. Red blood cells were lysed with ACK lysing buffer (Quality Biological) for splenocytes. Cells were counted and re-suspended in RPMI-1640 supplemented with 10% FBS and 1% penicillin/streptomycin (all from Life Technologies). 1 x 10 5 cells/well were seeded in a 96 well microplate and were incubated with 2 pg/100 pi of SA, SA-IL4 for 30 min on ice.
• Mouse CD4 + T cells were purified from spleens of C57BL/6 mice using EasySep mouse CD4 + T cell isolation kit (Stem Cell). Purified CD4 + T cells (10 6 cells/ml) were activated in six-well plates precoated with 5 pg/ml anti-CD3 antibody(clone 17A2, Bioxcell) and supplemented with soluble 2 pg/ml anti-CD28 antibody (clone 37.51, BioLegend) for 2 days. Culture medium was IMDM (Gibco) containing 10% heat-inactivated FBS, 1% Penicillin/Streptomycin and 50 pM 2-mercaptoethanol (Sigma Aldrich).
• CD4 + T cells were stimulated with 50 ng/ml recombinant murine IL-2 (Peprotech) for 3 hr to induce IL-4Ra expression.
• IL-2 murine IL-2
• cells were washed and rested in fresh medium for 3 hr.
• Cells were then transferred into 96-well plates (50,000 cells/well).
• Indicated amounts of wt IL-4 or SA-IL-4 were applied to CD4 + T cells for 15 min at 37 °C to induce STAT6 phosphorylation.
• Cells were fixed immediately using BD Phosflow Lyse/Fix buffer for 10 min at 37 °C and then permeabilized with BD Phosflow Perm Buffer III for 30 min on ice.
• Naive CD4 + T cells were isolated from splenocytes using EasySepTM Mouse Naive CD4 + T Cell Isolation Kit (STEMCELL Technologies) according to the manufacture’s instructions. 10 5 cells were plated in the 96 well plate and cultured for 3 days. As Thl7 induction media,
• IL-17A concentrations in the culture media were measured by IL-17 Ready-Set-Go! Mouse Uncoated ELISA kit (Invitrogen) according to the manufacturer’s protocol. Data were analyzed using Prism software (v6, GraphPad).
• Wt IL-4 or SA-IL-4 (equivalent to 10 pg of IL-4) was injected intravenously into female C57BL/6 mice. Blood samples were collected in protein-low binding tubes at 1 min, 10 min, 30 min, 1 hr, 2 hr, 4 hr and 24 hr after injection. IL-4 concentrations in plasma were measured by IL-4 Ready-Set-Go! Mouse Uncoated ELISA kit (Invitrogen) according to the manufacturer’s protocol.
• Wt IL-4, SA-IL-4 or SA(P573K)-IL-4 was injected intravenously into healthy C57BL/6 mice.
• Lumbar and brachial LNs and spleen were collected at 1 hr, 4 hr, and 24 hr after injection, and were subsequently homogenized using Lysing Matrix D and FastPrep-24 5G (MP Biomedical) for 40 s at 5000 beats/min in T-PER tissue protein extraction reagent (Thermo Scientific) with cOmpleteTM proteinase inhibitor cocktail (Roche). After homogenization, samples were incubated overnight at 4°C.
• the iliac LN was imaged with the Xenogen IVIS Imaging System 100 (Xenogen) under the following conditions: f/stop: 2; optical filter excitation 745 nm; excitation 800 nm; exposure time: 5 sec; small binning.
• Wt IL-4 and SA-IL-4 were fluorescently labeled with DyLight 594 NHS ester (Thermo Fisher), as described above. 1 hr after i.v. injection of fluorescently-labeled IL-4 (40 pg for wt IL-4 and same fluorescent amount for SA-IL-4), mice were sacrificed. Mouse LNs were harvested and fixed in 2% PFA in PBS overnight and washed with PBS. After overnight incubations in 30% sucrose solutions, LNs were embedded in Optimum Cutting Temperature compound. Then, 5 pm cryosections were cut using a cryostat.
• Sections were then blocked with 2% BSA in PBS at RT and incubated with the following primary antibodies for 2 hr at RT: 10 pg/ml hamster anti-mouse CD3s antibody (clone: 145-2C11, BioLegend) and 2.5 pg/ml rat anti-mouse PNAd (clone: MECA-79, BioLegend) antibody.
• 10 pg/ml hamster anti-mouse CD3s antibody (clone: 145-2C11, BioLegend) and 2.5 pg/ml rat anti-mouse PNAd (clone: MECA-79, BioLegend) antibody.
• tissues were stained for 1 hr at RT with the following fluorescently-labeled secondary antibodies were used: Alexa Fluor 647 goat anti-hamster (1 :400, Jackson ImmunoResearch) and Alexa Fluor 488 donkey anti-rat (1 :400, Jackson ImmunoResearch).
• the tissues were washed three times and then covered with ProLong gold antifade mountant with 4',6-diamidino-2-phenylindole (DAPI; Thermo Fisher Scientific).
• DAPI ProLong gold antifade mountant with 4',6-diamidino-2-phenylindole
• An 1X83 microscope (Olympus) was used for imaging with 10X magnification for CD3 staining, and a Leica SP8 3D Laser Scanning Confocal microscope with 20X magnification for PNAd staining. Images were processed using ImageJ software (NIH).
• C57BL/6 young female mice aged 9 to 12 wk were immunized subcutaneously at the dorsal flanks with an emulsion of MOG35-55 in complete Freund's adjuvant (CFA), followed by intraperitoneal administration of pertussis toxin (PTX) in PBS, first on the day of immunization and then again the following day.
• MOG35-55/CFA Emulsion and PTX were purchased from Hooke Laboratories. Following the first immunization, the severity of EAE was monitored and clinical scores were measured daily from day 8 after immunization. The clinical scores were determined by A.I., M.N. or A.S. based on the Hooke Laboratories criteria under blinding to the treatment grouping.
• IL-4, SA-IL-4, PBS was administered i.p. or s.c. (in the mouse back) in 100 m ⁇ PBS, every other day.
• FTY720 (1 mg/kg body weight) was administered orally every day.
• tissue sections were incubated with biotinylated anti-rat IgG (10 mg/mL, Vector laboratories) for 30 min at RT.
• biotinylated anti-rat IgG (10 mg/mL, Vector laboratories) for 30 min at RT.
• the antigen-antibody binding was detected by Elite kit (PK-6100, Vector Laboratories) and DAB (DAKO, K3468) system. Slides were imaged by EVOS FL Auto (Life Technologies).
• EAE mice were treated with PBS, wt IL-4, or SA-IL-4 (equivalent to 10 pg of IL-4) every other day, starting 8 days after immunization. Thirteen, 17 or 34 days after immunization, the spinal cord, spleen, and lumbar LNs were harvested. Spinal cord tissues were digested in Dulbecco's Modified Eagle Medium (DMEM) supplemented with 2% FBS, 2 mg/ml collagenase D (Sigma-Aldrich) and 40 pg/ml DNase I (Roche) for 30 min at 37°C. Single-cell suspensions were obtained by gently disrupting through a 70-pm cell strainer.
• DMEM Dulbecco's Modified Eagle Medium
• spleen red blood cells in blood were lysed with ACK lysing buffer (Quality Biological), followed by antibody staining for flow cytometry.
• Antibodies against the following molecules were used: anti-mouse CD3s (145-2C11, BD Biosciences), CD4 (RM4-5, BD Biosciences), anti-mouse CD8a (53-6.7, BD Biosciences), anti-mouse CD45 (30-F11, BD Biosciences), CD44 (IM7, BD Biosciences), CD62L (MEL-14, BD Biosciences), F4/80 (T45-2342, BD Biosciences), CD86 (GL1, BD Biosciences), CD206 (C068C2, BioLegend), Ly6G (1 A8, BioLegend), Ly6C (HK1.4, BioLegend), CDl lb (Ml/70, BioLegend), CDl lc (HL3, BD Biosciences), B220 (RA3-6B2, BioLegend),
• T-Select I- Ab MOG35-55 Tetramer-PE MBL International Corporation
• MOG38-49 Tetramer-PE NIH Tetramer Core Facility
• Fixable live/dead cell discrimination was performed using Fixable Viability Dye eFluor 455 (eBioscience), Live/Dead Fixable Violet (eBioscience), or Live/Dead Fixable Aqua (eBioscience), according to the manufacturer’s instructions. Staining was carried out on ice for 20 min.
• Cytofix/Cytoperm BD Bioscience was used to fix cells for 20 min at 4 °C .
• perm/wash buffer (BD Bioscience) was used, and cells were stained in perm/wash buffer for 30 min at 4 °C. Following a washing step, cells were stained with specific antibodies for 20 min on ice prior to fixation. All flow cytometric analyses were done using a Fortessa (BD Biosciences) flow cytometer and analyzed using FlowJo software (Tree Star).
• Cytofix/Cytoperm (BD Bioscience) was used for 20 min at 4 °C .
• perm/wash buffer (BD Bioscience) was used, and cells were stained in perm/wash buffer for 30 min at 4 °C.
• 2.5xl0 5 lymphocytes or lxlO 6 splenocytes were plated in a 96 well round bottom plate. Cells were stimulated with 10 pM MOG35-55 (for 6 hr culture followed by flow cytometry) or 100 pg/ml MOG protein (for 72 hr culture) (Anaspec). After 72 hr, supernatant was collected for analysis by ELISA using Ready-Set-Go! Kit (Invitrogen) or LEGEND MAX mouse GM-CSF ELISA kit (BioLegend).
• C57BL/6 mice were intravenously injected with PBS, wt IL-4, or SA-IL4
• mice Two days after, blood samples collected from mice were analyzed using a COULTER Ac*T 5diff CP hematology analyzer (Beckman Coulter) according to the manufacturer’s instructions. Lung and spleen were harvested and weighed. Water content in the lung was determined by weighing before and after overnight lyophilization using a FreeZone 6 Benchtop Freeze Dryer (Labconco). Serum samples collected from PBS, wt IL-4, and SA-IL-4-injected mice were analyzed using a Biochemistry Analyzer (Alfa Wassermann Diagnostic Technologies) according to the manufacturer’s instructions.

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