Claims for Patent: 8,420,086

Summary for Patent: 8,420,086

Title:	Camptothecin conjugates of anti-CD22 antibodies for treatment of B cell diseases
Abstract:	Disclosed herein are compositions and methods of use comprising combinations of anti-CD22 antibodies with a therapeutic agent. The therapeutic agent may be attached to the anti-CD22 antibody or may be separately administered, either before, simultaneously with or after the anti-CD22 antibody. In preferred embodiments, the therapeutic agent is an antibody or fragment thereof that binds to an antigen different from CD22, such as CD19, CD20, CD21, CD22, CD23, CD37, CD40, CD40L, CD52, CD80 and HLA-DR. However, the therapeutic agent may an immunomodulator, a cytokine, a toxin or other therapeutic agent known in the art. More preferably, the anti-CD22 antibody is part of a DNL complex, such as a hexavalent DNL complex. Most preferably, combination therapy with the anti-CD22 antibody or fragment and the therapeutic agent is more effective than the antibody alone, the therapeutic agent alone, or the combination of anti-CD22 antibody and therapeutic agent that are not conjugated to each other. Administration of the anti-CD22 antibody and therapeutic agent induces apoptosis and cell death of target cells in diseases such as B-cell lymphomas or leukemias, autoimmune disease or immune dysfunction disease.
Inventor(s):	Govindan; Serengulam V. (Summit, NJ), Goldenberg; David M. (Mendham, NJ)
Assignee:	Immunomedics, Inc. (Morris Plains, NJ)
Application Number:	13/213,245
Patent Claims:	1. A method of treating a B cell lymphoma or B cell leukemia comprising administering to an individual with a B cell lymphoma or B cell leukemia, an immunoconjugate consisting of (i) an anti-CD22 antibody or antigen binding fragment thereof; and (ii) at least one therapeutic agent attached by a linker to the anti-CD22 antibody or fragment thereof, wherein the therapeutic agent is selected from the group consisting of an anti-B cell antibody, an antigen-binding fragment of an anti-B cell antibody, an immunomodulator, a drug, an anti-angiogenic agent, a proapoptotic agent, a cytokine inhibitor, a chemokine inhibitor, a tyrosine kinase inhibitor, a sphingosine inhibitor, a hormone, a hormone antagonist, an enzyme inhibitor, and an oligonucleotide. 2. The method of claim 1, wherein the anti-CD22 antibody or fragment thereof comprises the light chain complementarity determining region (CDR) sequences CDR1 (KSSQSVLYSANHKYLA, SEQ ID NO:1), CDR2 (WASTRES, SEQ ID NO:12), and CDR3 (HQYLSSWIF, SEQ ID NO:3) and the heavy chain CDR sequences CDR1 (SYWLH, SEQ ID NO:4), CDR2 (YINPRNDYTEYNQNFKD, SEQ ID NO:5), and CDR3 (RDITTFY, SEQ ID NO:6). 3. The method of claim 1, wherein the anti-CD22 antibody or fragment thereof competes with, blocks binding to, or binds to the same epitope of CD22 as an LL2 antibody comprising the light chain CDR sequences CDR1 (KSSQSVLYSANHKYLA, SEQ ID NO:1), CDR2 (WASTRES, SEQ ID NO:2), and CDR3 (HQYLSSWTF, SEQ ID NO:3) and the heavy chain CDR sequences CDR1 (SYWLH, SEQ ID NO:4), CDR2 (YINPRNDYTEYNQNFKD, SEQ ID NO:5), and CDR3 (RDITTFY, SEQ ID NO:6). 4. The method of claim 1, wherein the anti-CD22 antibody or fragment thereof is selected from the group consisting of epratuzumab, 1F5, HIB22, FPC1, LT22, MEM-1, RFB4, bu59, fpc1, mc64-12 and IS7. 5. The method of claim 1, further comprising administering to said individual an anti-B cell antibody or antigen-binding fragment thereof that binds to an antigen selected from the group consisting of CD19, CD20, CD21, CD22, CD23, CD37, CD40, CD40L, CD52, CD80 and HLA-DR. 6. The method of claim 5, wherein the anti-B cell antibody or fragment thereof binds to CD20. 7. The method of claim 6, wherein the anti-B cell antibody is selected from the group consisting of GA101, BCX-301, DXL 625, L26, B-Ly1, MEM-97, LT20, 2H7, AT80, B-H20, HI20a, HI47, 13.6E12, 4f11, 5c11, 7d1, rituximab and veltuzumab. 8. The method of claim 6, wherein the anti-B cell antibody is rituximab or veltuzumab. 9. The method of claim 6, wherein the anti-B cell antibody or fragment thereof competes with, blocks binding to, or binds to the same epitope of CD20 as an hA20 antibody comprising the light chain complementarity-determining region (CDR) sequences CDR1 (RASSSVSYIH; SEQ ID NO:7), CDR2 (ATSNLAS; SEQ ID NO:8), and CDR3 (QQWTSNPPT; SEQ ID NO:9) and the heavy chain variable region CDR sequences CDR1 (SYNMH; SEQ ID NO:10), CDR2 (AIYPGNGDTSYNQKFKG; SEQ ID NO:11), and CDR3 (STYYGGDWYFDV; SEQ ID NO:12). 10. The method of claim 6, wherein the anti-B cell antibody or fragment thereof comprises the light chain complementarity-determining region (CDR) sequences CDR1 (RASSSVSYIH; SEQ ID NO:7), CDR2 (ATSNLAS; SEQ ID NO:8), and CDR3 (QQWTSNPPT; SEQ ID NO:9) and the heavy chain variable region CDR sequences CDR1 (SYNMH; SEQ ID NO:10), CDR2 (AIYPGNGDTSYNQKFKG; SEQ ID NO:11), and CDR3 (STYYGGDWYFDV; SEQ ID NO:12). 11. The method of claim 1, wherein the immunoconjugate is administered subcutaneously and the therapeutic agent is selected from the group consisting of an anti-B cell antibody, an antigen-binding fragment of an anti-B cell antibody, and an immunomodulator. 12. The method of claim 1, wherein the anti-B cell antibody or fragment of an anti-B cell antibody binds to an antigen selected from the group consisting of CD19, CD20, CD21, CD22, CD23, CD37, CD40, CD40L, CD52, CD80 and HLA-DR. 13. The method of claim 1, wherein the immunomodulator is selected from the group consisting of cytokines, lymphokines, monokines, stem cell growth factors, lymphotoxins, hematopoietic factors, colony stimulating factors (CSF), interferons (IFN), parathyroid hormone, thyroxine, insulin, proinsulin, relaxin, prorelaxin, follicle stimulating hormone (FSH), thyroid stimulating hormone (TSH), luteinizing hormone (LH), hepatic growth factor, prostaglandin, fibroblast growth factor, prolactin, placental lactogen, OB protein, transforming growth factor (TGF), TGF-.alpha., TGF-.beta., insulin-like growth factor (IGF), erythropoietin, thrombopoietin, tumor necrosis factor (TNF), TNF-.alpha., TNF-.beta., mullerian-inhibiting substance, mouse gonadotropin-associated peptide, inhibin, activin, vascular endothelial growth factor, integrin, interleukin (IL), granulocyte-colony stimulating factor (G-CSF), granulocyte macrophage-colony stimulating factor (GM-CSF), interferon-.alpha., interferon-.beta., interferon-.gamma., S1 factor, IL-1, IL-1 cc, IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-11, IL-12, IL-13, IL-14, IL-15, IL-16, IL-17, IL-18 IL-21, IL-23, IL-25, LIF, kit-ligand, FLT-3, angiostatin, thrombospondin and endostatin. 14. The method of claim 13, wherein the immunomodulator is interferon-.alpha.. 15. The method of claim 1, wherein the drug is selected from the group consisting of aplidin, azaribine, anastrozole, azacytidine, bleomycin, bortezomib, bryostatin-1, busulfan, calicheamycin, camptothecin, 10-hydroxycamptothecin, carmustine, celebrex, chlorambucil, cisplatin, irinotecan (CPT-11), SN-38, carboplatin, cladribine, cyclophosphamide, cytarabine, dacarbazine, docetaxel, dactinomycin, daunomycin glucuronide, daunorubicin, dexamethasone, diethylstilbestrol, doxorubicin, doxorubicin glucuronide, epirubicin glucuronide, ethinyl estradiol, estramustine, etoposide, etoposide glucuronide, etoposide phosphate, floxuridine (FUdR), 3',5'-O-dioleoyl-FudR (FUdR-dO), fludarabine, flutamide, fluorouracil, fluoxymesterone, gemcitabine, hydroxyprogesterone caproate, hydroxyurea, idarubicin, ifosfamide, L-asparaginase, leucovorin, lomustine, mechlorethamine, medroprogesterone acetate, megestrol acetate, melphalan, mercaptopurine, 6-mercaptopurine, methotrexate, mitoxantrone, mithramycin, mitomycin, mitotane, phenyl butyrate, prednisone, procarbazine, paclitaxel, pentostatin, PSI-341, semustine streptozocin, tamoxifen, taxanes, taxol, testosterone propionate, thalidomide, thioguanine, thiotepa, teniposide, topotecan, uracil mustard, velcade, vinblastine, vinorelbine and vincristine. 16. The method of claim 15, wherein the drug is SN-38. 17. The method of claim 16, further comprising storing the immunoconjugate prior to administration at a pH in the range of 5.5 to 7.5 in a solution comprising a buffer selected from the group consisting of 2-(N-morpholino)ethanesulfonic acid (MES), N-(2-acetamido)-2-iminodiacetic acid (ADA), 1,4-piperazinediethanesulfonic acid (PIPES), N-(2-acetamido)-2-aminoethanesulfonic acid (ACES), N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), N-tris(hydroxymethyl)methyl-2-aminoethanesulfonic acid (TES), and N-(2-hydroxyethyl)piperazine-N'-(2-ethanesulfonic acid) or HEPES. 18. The method of claim 17, wherein the buffer is 25 mM MES, pH 6.5. 19. The method of claim 17, wherein the solution further comprises trehalose and polysorbate 80. 20. The method of claim 19, further comprising lyophilizing the solution and storing the lyophilized antibody at 2-8.degree. C. 21. The method of claim 20, wherein the lyophilized antibody is stable at 2-8.degree. C. for at least 12 months. 22. The method of claim 1, wherein the anti-angiogenic agent is selected from the group consisting of angiostatin, endostatin, baculostatin, canstatin, maspin, an anti-VEGF binding molecule, an anti-placental growth factor binding molecule and an anti-vascular growth factor binding molecule. 23. The method of claim 1, wherein the B cell lymphoma or leukemia is selected from the group consisting of mantle cell lymphoma, multiple myeloma, Hodgkin's lymphoma, non-Hodgkin's lymphoma, diffuse large B cell lymphoma, Burkitt lymphoma, follicular lymphoma, acute lymphocytic leukemia, chronic lymphocytic leukemia and hairy cell leukemia. 24. The method of claim 23, wherein the B cell lymphoma is mantle cell lymphoma. 25. The method of claim 1, further comprising killing B cells by a mechanism selected from the group consisting of homotypic adhesion, loss of mitochondrial membrane potential, production of reactive oxygen species, increased phosphorylation of ERKs and JNK, downregulation of pAkt and Bcl-xL, and enlargement of lysosomes. 26. The method of claim 1, wherein the anti-CD22 antibody is a G1m3 allotype. 27. The method of claim 1, wherein the anti-CD22 antibody is a chimeric, humanized or human antibody. 28. The method of claim 1, wherein the anti-CD22 antibody or fragment thereof comprises human IgG1, IgG2, IgG3, or IgG4 constant regions. 29. A method of treating a B cell lymphoma or B cell leukemia comprising administering to an individual with a B cell lymphoma or B cell leukemia, an immunoconjugate consisting of (i) an anti-CD22 antibody or antigen binding fragment thereof and (ii) at least one therapeutic agent attached to the anti-CD22 antibody or fragment thereof, wherein the therapeutic agent is selected from the group consisting of an immunomodulator, a drug, an anti-angiogenic agent, a proapoptotic agent, a cytokine inhibitor, a chemokine inhibitor, a tyrosine kinase inhibitor, a sphingosine inhibitor, a hormone, a hormone antagonist, an enzyme inhibitor and an oligonucleotide. 30. The method of claim 29, wherein the anti-CD22 antibody or fragment thereof comprises the light chain complementarity determining region (CDR) sequences CDR1 (KSSQSVLYSANHKYLA, SEQ ID NO:1), CDR2 (WASTRES, SEQ ID NO:12), and CDR3 (HQYLSSWTF, SEQ ID NO:3) and the heavy chain CDR sequences CDR1 (SYWLH, SEQ ID NO:4), CDR2 (YINPRNDYTEYNQNFKD, SEQ ID NO:5), and CDR3 (RDITTFY, SEQ ID NO:6). 31. The method of claim 29, wherein the anti-CD22 antibody or fragment thereof competes with, blocks binding to, or binds to the same epitope of CD22 as an LL2 antibody comprising the light chain CDR sequences CDR1 (KSSQSVLYSANHKYLA, SEQ ID NO:1), CDR2 (WASTRES, SEQ ID NO:2), and CDR3 (HQYLSSWTF, SEQ ID NO:3) and the heavy chain CDR sequences CDR1 (SYWLH, SEQ ID NO:4), CDR2 (YINPRNDYTEYNQNFKD, SEQ ID NO:5), and CDR3 (RDITTFY, SEQ ID NO:6). 32. The method of claim 29, wherein the anti-CD22 antibody or fragment thereof is selected from the group consisting of epratuzumab, 1F5, HIB22, FPC1, LT22, MEM-1, RFB4, bu59, fpc1, mc64-12 and IS7. 33. The method of claim 29, further comprising administering to said individual an anti-B cell antibody or antigen-binding fragment thereof that binds to an antigen selected from the group consisting of CD19, CD20, CD21, CD22, CD23, CD37, CD40, CD40L, CD52, CD80 and HLA-DR. 34. The method of claim 29, wherein the immunomodulator is selected from the group consisting of cytokines, lymphokines, monokines, stem cell growth factors, lymphotoxins, hematopoietic factors, colony stimulating factors (CSF), interferons (IFN), parathyroid hormone, thyroxine, insulin, proinsulin, relaxin, prorelaxin, follicle stimulating hormone (FSH), thyroid stimulating hormone (TSH), luteinizing hormone (LH), hepatic growth factor, prostaglandin, fibroblast growth factor, prolactin, placental lactogen, OB protein, transforming growth factor (TGF), TGF-.alpha., TGF-.beta., insulin-like growth factor (IGF), erythropoietin, thrombopoietin, tumor necrosis factor (TNF), TNF-.alpha., TNF-.beta., mullerian-inhibiting substance, mouse gonadotropin-associated peptide, inhibin, activin, vascular endothelial growth factor, integrin, interleukin (IL), granulocyte-colony stimulating factor (G-CSF), granulocyte macrophage-colony stimulating factor (GM-CSF), interferon-.alpha., interferon-.beta., interferon-.gamma., S1 factor, IL-1, IL-1 cc, IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, IL-8, IL-9, IL-10, IL-11, IL-12, IL-13, IL-14, IL-15, IL-16, IL-17, IL-18 IL-21, IL-23, IL-25, LIF, kit-ligand, FLT-3, angiostatin, thrombospondin and endostatin. 35. The method of claim 29, wherein the immunomodulator is interferon-.alpha.. 36. The method of claim 29, wherein the drug is selected from the group consisting of aplidin, azaribine, anastrozole, azacytidine, bleomycin, bortezomib, bryostatin-1, busulfan, calicheamycin, camptothecin, 10-hydroxycamptothecin, carmustine, celebrex, chlorambucil, cisplatin, irinotecan (CPT-11), SN-38, carboplatin, cladribine, cyclophosphamide, cytarabine, dacarbazine, docetaxel, dactinomycin, daunomycin glucuronide, daunorubicin, dexamethasone, diethylstilbestrol, doxorubicin, doxorubicin glucuronide, epirubicin glucuronide, ethinyl estradiol, estramustine, etoposide, etoposide glucuronide, etoposide phosphate, floxuridine (FUdR), 3',5'-O-dioleoyl-FudR (FUdR-dO), fludarabine, flutamide, fluorouracil, fluoxymesterone, gemcitabine, hydroxyprogesterone caproate, hydroxyurea, idarubicin, ifosfamide, L-asparaginase, leucovorin, lomustine, mechlorethamine, medroprogesterone acetate, megestrol acetate, melphalan, mercaptopurine, 6-mercaptopurine, methotrexate, mitoxantrone, mithramycin, mitomycin, mitotane, phenyl butyrate, prednisone, procarbazine, paclitaxel, pentostatin, PSI-341, semustine streptozocin, tamoxifen, taxanes, taxol, testosterone propionate, thalidomide, thioguanine, thiotepa, teniposide, topotecan, uracil mustard, velcade, vinblastine, vinorelbine and vincristine. 37. The method of claim 29, wherein the drug is SN-38. 38. The method of claim 29, wherein the anti-angiogenic agent is selected from the group consisting of angiostatin, endostatin, baculostatin, canstatin, maspin, an anti-VEGF binding molecule, an anti-placental growth factor binding molecule and an anti-vascular growth factor binding molecule. 39. The method of claim 29, wherein the B cell lymphoma or leukemia is selected from the group consisting of mantle cell lymphoma, multiple myeloma, Hodgkin's lymphoma, non-Hodgkin's lymphoma, diffuse large B cell lymphoma, Burkitt lymphoma, follicular lymphoma, acute lymphocytic leukemia, chronic lymphocytic leukemia and hairy cell leukemia. 40. The method of claim 29, further comprising killing B cells by a mechanism selected from the group consisting of homotypic adhesion, loss of mitochondrial membrane potential, production of reactive oxygen species, increased phosphorylation of ERKs and JNK, downregulation of pAkt and Bcl-xL, and enlargement of lysosomes. 41. The method of claim 29, wherein the anti-CD22 antibody is a G1m3 allotype. 42. The method of claim 29, wherein the anti-CD22 antibody is a chimeric, humanized or human antibody. 43. The method of claim 29, wherein the anti-CD22 antibody or fragment thereof comprises human IgG1, IgG2, IgG3, or IgG4 constant regions.

Details for Patent 8,420,086

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
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