Claims for Patent: 9,061,995

Summary for Patent: 9,061,995

Title:	Cross-linkers and their uses
Abstract:	Charged or pro-charged cross-linking moieties and conjugates of cell binding agents and drugs comprising the charged or pro-charged cross-linking moieties and method of making the same.
Inventor(s):	Chari; Ravi V. J. (Newton, MA), Zhao; Robert Yongxin (Lexington, MA), Kovtun; Yelena (Stow, MA), Singh; Rajeeva (Framingham, MA), Widdison; Wayne C. (Belmont, MA)
Assignee:	ImmunoGen, Inc. (Waltham, MA)
Application Number:	14/080,377
Patent Claims:	1. A cell-binding agent-drug conjugate of formula (II) ##STR00067## wherein: CB represents a cell-binding agent; D represents a cytotoxic drug linked to the cell-binding agent by a disulfide, thioether, thioester, peptide, hydrazone, ester, ether, carbamate, or amide bond; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are the same or different and are H, linear alkyl having from 1-6 carbon atoms, branched or cyclic alkyl having from 3 to 6 carbon atoms, linear, branched or cyclic alkenyl or alkynyl having from 2 to 6 carbon atoms, a charged substituent selected from anions selected from SO.sub.3.sup.-, X--SO.sub.3.sup.-, OPO.sub.3.sup.2-, X--OPO.sub.3.sup.2-, PO.sub.3.sup.2-, X--PO.sub.3.sup.2-, CO.sub.2.sup.-, and cations selected from a nitrogen containing heterocycle, N.sup.+R.sub.11R.sub.12R.sub.13 and X--N.sup.+R.sub.11R.sub.12R.sub.13, or a phenyl; wherein: R.sub.11, R.sub.12, and R.sub.13 are the same or different and are H, linear alkyl having from 1 to 6 carbon atoms, branched or cyclic alkyl having from 3 to 6 carbon atoms and X represents phenyl or a linear alkyl from 1 to 6 carbon atoms, or branched or cyclic alkyl having from 3 to 6 carbon atoms; l, m and n are 0 or an integer from 1 to 4; Z is F1-E1-P-E2-F2 unit in which E1 and E2 are the same or different and are C.dbd.O, O, or NR.sub.14, wherein R.sub.14 is H, a linear alkyl having from 1-6 carbon atoms, a branched or cyclic alkyl having from 3 to 6 carbon atoms, a linear, branched or cyclic alkenyl or alkynyl having from 2 to 6 carbon atoms; P is a peptide unit between 2 and 20 amino acids in length, wherein E1 or E2 can be linked to the peptide through the terminal nitrogen, terminal carbon or through a side chain of one of the amino acids of the peptide; and F1 and F2 are the same or different and are an optional polyethyleneoxy unit of formula (OCH.sub.2CH.sub.2).sub.p, wherein p is 0 or an integer from 2 to about 1000; Y represents a carbonyl, thioether, amide, disulfide, or hydrazone group; and q represents an integer from 1 to 20. 2. The conjugate of claim 1, wherein the cytotoxic drug is selected from thiotepa; cyclophosphamide; alkyl sulfonates selected from busulfan, improsulfan and piposulfan; aziridines selected from benzodopa, carboquone, meturedopa, and uredopa; ethylenimines; methylamelamines; acetogenins selected from bullatacin and bullatacinone; camptothecin; bryostatin; callystatin; CC-1065; adozelesin, carzelesin or bizelesin synthetic analogues of CC-1065; cryptophycins; dolastatin; duocarmycin; KW-2189 or CBI-TMI synthetic analogues of duocarmycin; eleutherobin; pancratistatin; sarcodictyin; spongistatin; nitrogen mustards selected from chlorambucil, chlornaphazine, cholophosphamide, estramustine, ifosfamide, mechlorethamine, mechlorethamine oxide hydrochloride, melphalan, novembichin, phenesterine, prednimustine, trofosfamide, uracil mustard; nitrosureas selected from: carmustine, chlorozotocin, fotemustine, lomustine, nimustine, ranimustine; antibiotics selected from: the enediyne antibiotics, calicheamicin, calicheamicin gammal and calicheamicin theta I; dynemicin, including dynemicin A; esperamicin; neocarzinostatin chromophore and related chromoprotein enediyne antiobiotic chromomophores, aclacinomysins, actinomycin, authramycin, azaserine, bleomycins, cactinomycin, carabicin, caminomycin, carzinophilin; chromomycins, dactinomycin, daunorubicin, detorubicin, 6-diazo-5-oxo-L-norleucine, doxorubicin epirubicin, esorubicin, idarubicin, marcellomycin, nitomycins, mycophenolic acid, nogalamycin, olivomycins, peplomycin, potfiromycin, puromycin, quelamycin, rodorubicin, streptonigrin, streptozocin, tubercidin, ubenimex, zinostatin, zorubicin; anti-metabolites selected from methotrexate and 5-fluorouracil (5-FU); folic acid analogues selected from denopterin, methotrexate, pteropterin, trimetrexate; purine analogs selected from fludarabine, 6-mercaptopurine, thiamiprine, thioguanine; pyrimidine analogs selected from ancitabine, azacitidine, 6-azauridine, carmofur, cytarabine, dideoxyuridine, doxifluridine, enocitabine, floxuridine; androgens selected from calusterone, dromostanolone propionate, epitiostanol, mepitiostane, testolactone; anti-adrenals selected from: aminoglutethimide, mitotane, trilostane; folic acid replenisher selected from frolinic acid; aceglatone; aldophosphamide glycoside; aminolevulinic acid; amsacrine; bestrabucil; bisantrene; edatraxate; defofamine; demecolcine; diaziquone; elfomithine; elliptinium acetate; epothilone; etoglucid; gallium nitrate; hydroxyurea; lentinan; lonidamine; maytansinoids selected from maytansine and ansamitocins; mitoguazone; mitoxantrone; mopidamol; nitracrine; pentostatin; phenamet; pirarubicin; podophyllinic acid; 2-ethylhydrazide; procarbazine; PSK.RTM.; razoxane; rhizoxin; sizofuran; spirogermanium; tenuazonic acid; triaziquone; 2,2',2''-trichlorotriethylamine; trichothecenes selected from T-2 toxin, verracurin A, roridin A and anguidine; urethan; vindesine; dacarbazine; mannomustine; mitobronitol; mitolactol; pipobroman; gacytosine; arabinoside ("Ara-C"); cyclophosphamide; thiotepa; taxanes; chlorambucil; gemcitabine; 6-thioguanine; mercaptopurine; methotrexate; platinum analogs selected from cisplatin and carboplatin; vinblastine; platinum; etoposide (VP-16); ifosfamide; mitomycin C; mitoxantrone; vincristine; vinorelbine; navelbine; novantrone; teniposide; daunomycin; aminopterin; xeloda; ibandronate; CPT-11; topoisomerase inhibitor RFS 2000; difluoromethylomithine (DMFO); retinoic acid; capecitabine; anti-hormonal agents selected from anti-estrogens including tamoxifen, raloxifene, aromatase inhibiting 4(5)-imidazoles, 4-hydroxytamoxifen, trioxifene, keoxifene, LY117018, onapristone, and toremifene (Fareston); and anti-androgens selected from flutamide, nilutamide, bicalutamide, leuprolide, and goserelin, siRNA or a combination thereof; and pharmaceutically acceptable salts, acids or derivatives of any of the above. 3. The conjugate of claim 1, wherein the cytotoxic drug is selected from maytansinoids, CC-1065 analogs, morpholino doxorubicin, taxanes, calicheamicins, auristatins, pyrrolobenzodiazepine dimmer, siRNA or a combination thereof, and pharmaceutically acceptable salts, acids or derivatives of any of the above. 4. The conjugate of claim 1, wherein the cell-binding agent binds to target cells selected from tumor cells, virus infected cells, microorganism infected cells, parasite infected cells, autoimmune cells, activated cells, myeloid cells, activated T-cells, B cells, or melanocytes, cells expressing one or more of IGF-IR, CanAg, EGFR, EphA2 receptor, MUC1, MUC16, VEGF, TF, MY9, anti-B4, EpCAM, CD2, CD3, CD4, CD5, CD6, CD11, CD11a, CD18, CD19, CD.sub.2O, CD22, CD26, CD30, CD33, CD37, CD38, CD40, CD44, CD56, CD79, CD105, CD138, EphA receptors, EphB receptors, EGFr, EGFRvIII, HER2/neu, HER3, mesothelin, cripto, alpha.sub.vbeta.sub.3 integrin, alpha.sub.vbeta.sub.5 integrin, alpha.sub.vbeta.sub.6 integrin, Apo2, and C242 antigens; and cells expressing insulin growth factor receptor, epidermal growth factor receptor, or folate receptor. 5. The conjugate of claim 1, wherein the cell-binding agent is an antibody, a single chain antibody, an antibody fragment that binds to a target cell, a monoclonal antibody, a single chain monoclonal antibody, or a monoclonal antibody fragment that binds the target cell, a chimeric antibody, a chimeric antibody fragment that binds to the target cell, a domain antibody, a domain antibody fragment that binds to the target cell, adnectins that mimic antibodies, DARPins, a lymphokine, a hormone, a vitamin, a growth factor, a colony stimulating factor, or a nutrient-transport molecule. 6. The conjugate of claim 5, wherein the antibody is a resurfaced antibody, a resurfaced single chain antibody, or a resurfaced antibody fragment thereof. 7. The conjugate of claim 5, wherein the antibody is a monoclonal antibody, a single chain monoclonal antibody, or a monoclonal antibody fragment thereof. 8. The conjugate of claim 5, wherein the antibody is a human antibody, a humanized antibody or a resurfaced antibody, a humanized single chain antibody, or a humanized antibody fragment thereof. 9. The conjugate of claim 5, wherein the antibody is a chimeric antibody, a chimeric antibody fragment, a domain antibody, or a domain antibody fragment thereof. 10. The conjugate of claim 8, wherein the antibody is My9-6, B4, C242, N901, DS6, EpCAM, EphA2 receptor, CD38, IGF-IR, CNTO 95, B-B4, trastuzumab, pertuzumab, bivatuzumab, sibrotuzumab, pertuzumab, or rituximab. 11. The conjugate of claim 4, wherein the tumor cells are selected from breast cancer cells, prostate cancer cells, ovarian cancer cells, colorectal cancer cells, gastric cancer cells, squamous cancer cells, small-cell lung cancer cells, and testicular cancer cells. 12. A method of treating a tumor comprising administering to a subject in need of treatment a therapeutically effective amount of a conjugate of claim 1. 13. A compound of formula (III): ##STR00068## wherein: CB represents a cell-binding agent; Q represents a functional group that enables linkage of a cytotoxic drug via a disulfide, thioether, thioester, peptide, hydrazone, ester, ether, carbamate or amide bond; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are the same or different and are H, linear alkyl having from 1-6 carbon atoms, branched or cyclic alkyl having from 3 to 6 carbon atoms, linear, branched or cyclic alkenyl or alkynyl having from 2 to 6 carbon atoms, a charged substituent selected from anions selected from SO.sub.3.sup.-, X--SO.sub.3.sup.-, OPO.sub.3.sup.2-, X--OPO.sub.3.sup.2-, PO.sub.3.sup.2-, X--PO.sub.3.sup.2-, CO.sub.2.sup.-, and cations selected from a nitrogen containing heterocycle, N.sup.+R.sub.11R.sub.12R.sub.13 and X--N.sup.+R.sub.11R.sub.12R.sub.13, or a phenyl, wherein: R.sub.11, R.sub.12, and R.sub.13 are the same or different and are H, linear alkyl having from 1 to 6 carbon atoms, or branched or cyclic alkyl having from 3 to 6 carbon atoms and X represents phenyl or a linear alkyl having from 1 to 6 carbon atoms, or branched or cyclic alkyl having from 3 to 6 carbon atoms; l, m and n are 0 or an integer from 1 to 4; Z is F1-E1-P-E2-F2 unit in which E1 and E2 are the same or different and are C.dbd.O, O, or NR.sub.14, wherein R.sub.14 is H, a linear alkyl having from 1-6 carbon atoms, a branched or cyclic alkyl having from 3 to 6 carbon atoms, a linear, branched or cyclic alkenyl or alkynyl having from 2 to 6 carbon atoms; P is a peptide unit between 2 and 20 amino acids in length, wherein E1 or E2 can be linked to the peptide through the terminal nitrogen, terminal carbon or through a side chain of one of the amino acids of the peptide; and F1 and F2 are the same or different and are an optional polyethyleneoxy unit of formula (OCH.sub.2CH.sub.2).sub.p, wherein p is 0 or an integer from 2 to about 1000; and Y represents a carbonyl, thioether, amide, disulfide, or hydrazone group; and q represents an integer from 1 to 20. 14. A compound of formula (IV): ##STR00069## wherein: Y' represents a functional group that enables reaction with a cell-binding agent; D represents a cytotoxic drug linked to the cell-binding agent by a disulfide, thioether, thioester, peptide, hydrazone, ester, ether, carbamate, or amide bond; R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7, R.sub.8, R.sub.9, and R.sub.10 are the same or different and are H, linear alkyl having from 1-6 carbon atoms, branched or cyclic alkyl having from 3 to 6 carbon atoms, linear, branched or cyclic alkenyl or alkynyl having from 2 to 6 carbon atoms, a charged substituent selected from anions selected from SO.sub.3.sup.-, X--SO.sub.3.sup.-, OPO.sub.3.sup.2-, X--OPO.sub.3.sup.2-, PO.sub.3.sup.2-, X--PO.sub.3.sup.2-, CO.sub.2.sup.-, and cations selected from a nitrogen containing heterocycle, N.sup.+R.sub.11R.sub.12R.sub.13 and X--N.sup.+R.sub.11R.sub.12R.sub.13, or a phenyl, wherein: R.sub.11, R.sub.12, and R.sub.13 are the same or different and are H, linear alkyl having from 1 to 6 carbon atoms, or branched or cyclic alkyl having from 3 to 6 carbon atoms and X represents phenyl or a linear alkyl having from 1 to 6 carbon atoms, or branched or cyclic alkyl having from 3 to 6 carbon atoms; l, m and n are 0 or an integer from 1 to 4; and Z is F1-E1-P-E2-F2 unit in which E1 and E2 are the same or different and are C.dbd.O, O, or NR.sub.14, wherein R.sub.14 is H, a linear alkyl having from 1-6 carbon atoms, a branched or cyclic alkyl having from 3 to 6 carbon atoms, a linear, branched or cyclic alkenyl or alkynyl having from 2 to 6 carbon atoms; P is a peptide unit between 2 and 20 amino acids in length, wherein E1 or E2 can be linked to the peptide through the terminal nitrogen, terminal carbon or through a side chain of one of the amino acids of the peptide; and F1 and F2 are the same or different and are an optional polyethyleneoxy unit of formula (OCH.sub.2CH.sub.2).sub.p, wherein p is 0 or an integer from 2 to about 1000. 15. A pharmaceutical composition comprising an effective amount of the conjugate of claim 1, a pharmaceutically acceptable salt or solvate thereof, and a pharmaceutically acceptable carrier, diluent or excipient. 16. The conjugate of claim 1, wherein E1 and E2 are the same or different and are C.dbd.O or NR.sub.14, wherein R.sub.14 is H, a linear alkyl having 1-6 carbon atoms or a branched or cyclic alkyl having from 3 to 6 carbon atoms; and P is a peptide unit between 2 and 8 amino acids. 17. The conjugate of claim 16, wherein R.sub.14 is H or a linear alkyl having 1-6 carbon atoms; and P is a peptide unit between 2 and 5 amino acids; and F1 and F2 are absent. 18. The conjugate of claim 17, wherein P is gly-gly-gly. 19. The conjugate of claim 18, wherein the cytotoxic drug is a maytansinoid. 20. The conjugate of claim 19, wherein the maytansinoid is DM1 or DM4. 21. A cross linker represented by the following formula: ##STR00070## 22. The compound of claim 13, wherein E1 and E2 are the same or different, and are C.dbd.O or NR.sub.14, wherein R.sub.14 is H, a linear alkyl having 1-6 carbon atoms, or a branched or cyclic alkyl having from 3 to 6 carbon atoms; and P is a peptide unit between 2 and 8 amino acids. 23. The compound of claim 22, wherein R.sub.14 is H or a linear alkyl having 1-6 carbon atoms; and P is a peptide unit between 2 and 5 amino acids; and F1 and F2 are absent. 24. The compound of claim 23, wherein P is gly-gly-gly. 25. The compound of claim 13, wherein the cell-binding agent is an antibody, a single chain antibody, an antibody fragment that binds to a target cell, a monoclonal antibody, a single chain monoclonal antibody, or a monoclonal antibody fragment that binds to the target cell, a resurfaced antibody, a resurfaced single chain antibody, or a resurfaced antibody fragment that binds to the target cell, a human antibody, a humanized antibody or a resurfaced antibody, a humanized single chain antibody, or a humanized antibody fragment that binds to the target cell, a chimeric antibody, a chimeric antibody fragment that binds to the target cell, a domain antibody, a domain antibody fragment that binds to the target cell, adnectins that mimic antibodies, DARPins, a lymphokine, a hormone, a vitamin, a growth factor, a colony stimulating factor, or a nutrient-transport molecule. 26. The compound of claim 25, wherein the antibody is My9-6, B4, C242, N901, DS6, CNTO 95, B-B4, trastuzumab, pertuzumab, bivatuzumab, sibrotuzumab, pertuzumab, rituximab, or an antibody that binds EpCAM, EphA2 receptor, CD38, or IGF-IR. 27. The compound of claim 13, wherein the cell-binding agent binds to target cells selected from tumor cells, virus infected cells, microorganism infected cells, parasite infected cells, autoimmune cells, activated cells, myeloid cells, activated T-cells, B cells, or melanocytes, cells expressing one or more of IGF-IR, CanAg, EGFR, EphA2 receptor, MUC1, MUC16, VEGF, TF, EpCAM, CD2, CD3, CD4, CD5, CD6, CD11, CD11a, CD18, CD19, CD20, CD22, CD26, CD30, CD33, CD37, CD38, CD40, CD44, CD56, CD79, CD105, CD138, EphA receptors, EphB receptors, EGFR, EGFRvIII, HER2/neu, HER3, mesothelin, cripto, alpha.sub.vbeta.sub.3 integrin, alpha.sub.vbeta.sub.5 integrin, alpha.sub.vbeta.sub.6 integrin, Apo2, and C242 antigens; and cells expressing insulin growth factor receptor, epidermal growth factor receptor, or folate receptor. 28. The compound of claim 27, wherein the tumor cells are selected from breast cancer cells, prostate cancer cells, ovarian cancer cells, colorectal cancer cells, gastric cancer cells, squamous cancer cells, small-cell lung cancer cells, and testicular cancer cells. 29. The compound of claim 14, wherein the cytotoxic drug is a maytansinoid. 30. The compound of claim 29, wherein the maytansinoid is DM1 or DM4. 31. The compound of claim 29, wherein E1 and E2 are the same or different, and are C.dbd.O or NR.sub.14, wherein R.sub.14 is H, a linear alkyl having 1-6 carbon atoms, or a branched or cyclic alkyl having from 3 to 6 carbon atoms; and P is a peptide unit between 2 and 8 amino acids. 32. The compound of claim 30, wherein R.sub.14 is H or a linear alkyl having 1-6 carbon atoms; and P is a peptide unit between 2 and 5 amino acids; and F1 and F2 are absent. 33. The compound of claim 32, wherein P is gly-gly-gly.

Details for Patent 9,061,995

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Genentech, Inc.	RITUXAN	rituximab	Injection	103705	11/26/1997		2028-04-30
Idec Pharmaceuticals Corp.	RITUXAN	rituximab	Injection	103737	02/19/2002		2028-04-30
Genentech, Inc.	HERCEPTIN	trastuzumab	For Injection	103792	09/25/1998		2028-04-30