IP Library Granted Patent US 12,303,571
Granted Patent B2
US 12,303,571 · App. 17/373,987 · Granted May 20, 2025

Specific conjugation linkers, specific immunoconjugates thereof, methods of making and uses such conjugates thereof

Inventors: Robert Yongxin Zhao (Lexington, MA); Qingliang Yang (Hangzhou, CN); Yuanyuan Huang (Hangzhou, CN); Shun Gai (Hangzhou, CN); Linyao Zhao (Hangzhou, CN); Hangbo Ye (Hangzhou, CN); Huihui Guo (Hangzhou, CN); Qianqian Tong (Hangzhou, CN); Minjun Cao (Hangzhou, CN); Junxiang Jia (Hangzhou, CN); Chengyu Yang (Hangzhou, CN); Wenjun Li (Hangzhou, CN); Xiaomai Zhou (Hangzhou, CN); Hongsheng Xie (Hangzhou, CN); Chen Lin (Hangzhou, CN); Zhixiang Guo (Hangzhou, CN); Zhicang Ye (Hangzhou, CN)
Assignee: HANGZHOU DAC BIOTECH CO., LTD.
A61K49/0058A61K47/68031A61K47/68033A61K47/68035A61K47/6809A61K47/6829A61K47/6889A61K49/0032A61K49/0043C07D417/12C07D417/14C07D498/18C07D513/22C07D519/00A61K31/194A61K45/06
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Quick Facts
Patent No.
US 12,303,571
App. No.
17/373,987
Granted
May 20, 2025
Kind
B2
Abstract

The present invention relates to novel linkers containing a 2,3-disubstituted succinic group, or 2-monosubstituted, or 2,3-disubstituted fumaric or maleic (trans (E)- or cis (Z)-butenedioic), or acetylenedicarboxyl group for conjugation of a cytotoxic agent, and/or one or more different functional molecules per linker to a cell-binding molecule, through bridge linking pairs of thiols on the cell-binding molecule specifically. The invention also relates to methods of making such linkers, and of using such linkers in making homogeneous conjugates, as well as of application of the conjugates in treatment of cancers, infections and autoimmune disorders.

Claims (25)

1. A compound having a structure of formula (III)

wherein:

represents either a single bond or a double bond;

Cb is a cell-binding agent selected from the group consisting of an antibody, a protein and a peptide;

X 1 and X 2 are independently absent or selected from the group consisting of NH; NHNH; N(R 3 );

N(R 3 )N(R 3 ′); O; S; B(R 3 ); Si(R 3 )N(R 3 ′); P(O)(R 3 ); C 1 -C 8 of alkyl; C 2 -C 8 of heteroalkyl, alkylcycloalkyl, or heterocycloalkyl; C 3 -C 8 of aryl, Ar-alkyl, heterocyclic, carbocyclic, cycloalkyl, heteroalkylcycloalkyl, alkylcarbonyl, or heteroaryl; 1-8 amino acids; wherein R 3 and R 3 , are independently H; C 1 -C 8 of alkyl; C 2 -C 8 of heteroalkyl, alkylcycloalkyl, or heterocycloalkyl; C 3 -C 8 of aryl, Ar-alkyl, heterocyclic, carbocyclic, cycloalkyl, heteroalkylcycloalkyl, alkylcarbonyl, or heteroaryl; C 1 -C 8 of esters, ether, or amide; polyethyleneoxy unit of formula (OCH 2 CH 2 ) p or (OCH 2 CH(CH 3 )) p , wherein p is an integer from 0 to about 1000, and a combination thereof;

R 1 and R 2 are independently one or more, or repeating, or a combining thereof, of the following components:

natural or unnatural peptides containing 1-20 amino acids;

m 1 and m 2 are independently an integer from 1 to 30;

n is an integer from 1 to 30; and

Z 1 is a function group that enables the compound to react with a cytotoxic drug, to form a disulfide, thioether, thioester, peptide, hydrazone, ether, ester, carbamate, carbonate, secondary, tertiary, or quarter amine, imine, cycloheteroalkyl, heteroaromatic, alkoxime or amide bond.

2. The compound of claim 1 , wherein the cell-binding agent is an antibody, full-length antibodies, polyclonal antibodies, monoclonal antibodies, dimer antibodies, multimer antibodies, multispecific antibodies, bispecific or trispecific antibodies, a single chain antibody, an antibody fragment that binds to the 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, a resurfaced antibody, a resurfaced single chain antibody, or a resurfaced antibody fragment that binds to the target cell, a humanized antibody or a resurfaced antibody, a humanized single chain antibody, or a humanized antibody fragment that binds to the target cell, anti-idiotypic antibodies, CDR's, diabody, triabody, tetrabody, miniantibody, small immune protein or large molecular weight protein.

3. The compound of claim 1 , wherein the cell-binding agent is an antibody, a protein or a peptide that is able to target against a tumor cell, a virus infected cell, a microorganism infected cell, a parasite infected cell, an autoimmune disease cell, an activated tumor cells, a myeloid cell, an activated T-cell, an affecting B cell, or a melanocyte.

4. The compound of claim 1 , wherein the cell-binding agent is an antibody, a protein or a peptide that is able to target against any one of the following antigens or receptors: CD3, CD4, CD5, CD6, CD7, CD8, CD9, CD10, CD11a, CD11b, CD11c, CD12w, CD14, CD15, CD16, CDw17, CD18, CD19, CD20, CD21, CD22, CD23, CD24, CD25, CD26, CD27, CD28, CD29, CD30, CD31, CD32, CD33, CD34, CD35, CD36, CD37, CD38, CD39, CD40, CD41, CD42, CD43, CD44, CD45, CD46, CD47, CD48, CD49b, CD49c, CD51, CD52, CD53, CD54, CD55, CD56, CD58, CD59, CD61, CD62E, CD62L, CD62P, CD63, CD66, CD68, CD69, CD70, CD72, CD74, CD79, CD79a, CD79b, CD80, CD81, CD82, CD83, CD86, CD87, CD88, CD89, CD90, CD91, CD95, CD96, CD98, CD100, CD103, CD105, CD106, CD109, CD117, CD120, CD125, CD126, CD127, CD133, CD134, CD135, CD137, CD138, CD141, CD142, CD143, CD144, CD147, CD151, CD147, CD152, CD154, CD156, CD158, CD163, CD166, CD168, CD174, CD180, CD184, CDw186, CD194, CD195, CD200, CD200a, CD200b, CD209, CD221, CD227, CD235a, CD240, CD262, CD271, CD274, CD276, CD303, CD304, CD309, CD326, 4-1BB, 5AC, 5T4 trophoblast glycoprotein, TPBG, 5T4, Wnt-activated inhibitory factor 1 or WAIF1, adenocarcinoma antigen, AGS-5, AGS-22M6, activin receptor-like kinase 1, AFP, AKAP-4, ALK, alpha intergrin, alpha v beta6, amino-peptidase N, amyloid beta, androgen receptor, angiopoietin 2, angiopoietin 3, annexin A1, anthrax toxin protective antigen, anti-transferrin receptor, AOC3, B7-H3, Bacillus anthracis anthrax, BAFF, BCMA, B-lymphoma cell, bcr-abl, bombesin, BORIS, C5, C242 antigen, CA125, CA-IX, CALLA, CanAg, canis lupus familiaris IL31, carbonic anhydrase IX, cardiac myosin, CCL11, CCR4, CCR5, CD3E, CEA, CEACAM3, CEACAM5, CFD, Ch4D5, cholecystokinin 2, CLDN18, clumping factor A, cMet, CRIPTO, FCSF1R, CSF2 colony stimulating factor 2, and granulocyte-macrophage colony-stimulating factor, CSP4, CTLA4, CTAA16.88 tumor antigen, CXCR4, C-X-C chemokine receptor type 4, cyclic ADP ribose hydrolase, cyclin B1, CYP1B1, cytomegalovirus, cytomegalovirus glycoprotein B, dabigatran, DLL4, DPP4, DR5, E. coli shiga toxin type-1, E. coli shiga toxin type-2, ED-B, EGFL7, EGFR, EGFRII, EGFRvIII, endoglin, endothelin B receptor, endotoxin, EpCAM, EphA2, episialin, ERBB2, ERBB3, ERG, Escherichia coli , ETV6-AML, FAP, FCGR1, alpha-fetoprotein, fibrin II, beta chain, fibronectin extra domain-B, FOLR, folate receptor alpha, folate hydrolase, Fos-related antigen 1F protein of respiratory syncytial virus, frizzled receptor, fucosyl GM1, GD2 ganglioside, G-28, GD3 idiotype, globoH, glypican 3, N-glycolylneuraminic acid, GM3, GMCSF receptor α-chain, growth differentiation factor 8, GP100, GPNMB, GUCY2C guanylate cyclase 2C, guanylyl cyclase C, intestinal guanylate cyclase, guanylate cyclase-C receptor, and heat-stable enterotoxin receptor, heat shock proteins, hemagglutinin, hepatitis B surface antigen, hepatitis B virus, HER1, HER2, HER2/neu, HER3, IgG4, HGF/SF, HHGFR, HIV-1, histone complex, HLA-DR, HLA-DR10, HLA-DRB, HMWMAA, human chorionic gonadotropin, HNGF, human scatter factor receptor kinase, HPV E6/E7, Hsp90, hTERT, ICAM-1, idiotype, IGF1R, IGHE, IFN-γ, influenza hemagglutinin, IgE, IgE Fc region, IGHE, IL-1, IL-2 receptor, IL-4, IL-5, IL-6, IL-6R, IL-9, IL-10, IL-12, IL-13, IL-17, IL-17A, IL-20, IL-22, IL-23, IL31RA, ILGF2, integrins α4, α IIb β 3 , ανβ3, α 4 β 7 , α5β1, α6β4, α7β7, αIIβ3, α5β5, and ανβ5, interferon gamma-induced protein, ITGA2, ITGB2, KIR2D, Kappa Ig, LCK, Le, legumain, Lewis-Y antigen, LFA-1, LHRH, LINGO-1, Lipoteichoic acid, LIV1A, LMP2, LTA, MAD-CT-1, MAD-CT-2, MAGE-1, MAGE-2, MAGE-3, MAGE A1, MAGE A3, MAGE 4, MART1, MCP-1, MIF macrophage migration inhibitory factor, or glycosylation-inhibiting factor, MS4A1, MSLN, MUC1 mucin 1, or polymorphic epithelial mucin, MUC1-KLH, MUC16, MCP1, melanA/MART1, ML-IAP, MPG, MS4A1, MYCN, myelin-associated glycoprotein, myostatin, NA17, NARP-1, NCA-90, Nectin-4, NGF, neural apoptosis-regulated proteinase 1, NOGO-A, notch receptor, nucleolin, Neu oncogene product, NY-BR-1, NY-ESO-1, OX-40, OxLDL, OY-TES1, P21, p53 nonmutant, P97, Page4, PAP, paratope of anti-(N-glycolylneuraminic acid), PAX3, PAX5, PCSK9, PDCD1, PDGF-Ra, PDGFR-β, PDL-1, PLAC1, PLAP-like testicular alkaline phosphatase, platelet-derived growth factor receptor beta, phosphate-sodium co-transporter, PMEL 17, polysialic acid, proteinase3, prostatic carcinoma, phosphatidylserine, prostatic carcinoma cells, Pseudomonas aeruginosa , PSMA, PSA, PSCA, rabies virus glycoprotein, RHD, rhesus factor, RANKL, RhoC, Ras mutant, RGS5, ROBO4, respiratory syncytial virus, RON, ROR1, sarcoma translocation breakpoints, SART3, sclerostin, SLAMF7, selectin P, SDC1, sLe(a), somatomedin C, SIP, somatostatin, sperm protein 17, SSX2, STEAP1, STEAP2, STn, TAG-72, survivin, T-cell receptor, T cell transmembrane protein, TEM1, TENB2, tenascin C, TGF-α, TGF-β, TGF-β1, TGF-β2, Tie, Tie2, TIM-1, Tn, TNF, TNF-α, TNFRSF8, TNFRSF10B, TNFRSF-13B, TPBG, TRAIL-R1, TRAILR2, tumor-associated calcium signal transducer 2, tumor specific glycosylation of MUC1, TWEAK receptor, TYRP1, TRP-2, Tyrosinase, VCAM-1, VEGF, VEGF-A, VEGF-2, VEGFR-1, VEGFR2, or vimentin, WT1, XAGE 1, or cells expressing any insulin growth factor receptors, or any epidermal growth factor receptors.

5. The compound of claim 3 , wherein the tumor cell is selected from the group consisting of lymphoma cells, myeloma cells, renal cells, breast cancer cells, prostate cancer cells, ovarian cancer cells, colorectal cancer cells, gastric cancer cells, squamous cancer cells, small-cell lung cancer cells, none small-cell lung cancer cells, testicular cancer cells, malignant cells, and any cells that grow and divide at an unregulated, quickened pace to cause a cancer.

6. The compound of claim 1 , wherein m 1 and m 2 are independently an integer from 1 to 10.

7. The compound of claim 1 , wherein R 1 or R 2 is cleavable by a protease.

8. The compound of claim 1 , wherein Z 1 comprises at least one of thiol, disulfide, amino, carboxyl, aldehyde, ketone, maleimido, haloacetyl, hydrazine, alkoxyamino, or hydroxy.

9. The compound of claim 1 , wherein Z 1 comprises at least one of N-hydroxysuccinimide ester, p-nitrophenyl ester, dinitrophenyl ester, pentafluorophenyl ester, carboxylic acid chloride, carboxylic acid anhydride, pyridyldisulfide, nitropyridyldisulfide, maleimide, haloacetate, methylsulfonephenyloxadiazole, amine, alkoxyamine, hydrazine, acyloxylamine, hydrazide, or alkyne.

10. The compound of claim 1 , wherein Z 1 is

wherein X 1 ′ is F, Cl, Br, I or Lv 3 ; X 2 ′ is O, NH, N(R 1 ), or CH 2 ; R 3 and R 5 are H, R 1 , aromatic, heteroaromatic, or aromatic group wherein one or several H atoms are replaced independently by —R, -halogen, —OR 1 , —SR 1 , —NR 1 R 2 , —NO 2 , —S(O)R 1 , —S(O) 2 R 1 , or —COOR 1 ; Lv 3 is a leaving group selected from the group consisting of methanesulfonyl, toluenesulfonyl, trifluoromethyl-sulfonyl, trifluoromethylsulfonate, nitrophenoxyl, N-succinimidyloxyl, phenoxyl; dinitrophenoxyl; pentafluorophenoxyl, tetrafluorophenoxyl, trifluorophenoxyl, difluorophenoxyl, monofluorophenoxyl, pentachlorophenoxyl, 1H-imidazole-1-yl, chlorophenoxyl, dichlorophenoxyl, trichlorophenoxyl, tetrachlorophenoxyl, N-(benzotriazolyl) oxyl, 2-ethyl-5-phenylisoxazolium-yl, phenyloxadiazol-yl, oxadiazol-yl, wherein R 1 and R 2 are the same defined in claim 1 , or an intermediate molecule generated from any of above with a condensation reagent for peptide coupling reactions or for Mitsunobu reactions.

11. A method of preparing a compound of formula (II), wherein the method comprises reacting the compound of claim 1 with a Drug 1 -containing compound:

wherein Drug 1 represents a cytotoxic agent or a drug, n is an integer of 1 to 30, and Cb, R 1 , R 2 , X 1 , X 2 , m 1 , m 2 and n are defined the same as in claim 1 .

12. The method of claim 11 , wherein the Drug 1 -containing compound comprises a hydroxyl group, thiol group or amino group.

13. The method of claim 11 , wherein the Drug 1 -containing compound is Drug 1 -OH, Drug 1 -NH 2 , Drug 1 -CO—NH—NH 2 , or Drug 1 -O—NH 2 .

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 14, 2021
From: SUZHOU M-CONJ BIOTECH CO., LTD.
To: HANGZHOU DAC BIOTECH CO., LTD.
Reel/Frame 056850/0830 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 13, 2021
From: ZHAO, ROBERT YONGXIN; YANG, QINGLIANG; HUANG, YUANYUAN; GAI, SHUN; ZHAO, LINYAO; YE, HANGBO; GUO, HUIHUI; TONG, QIANQIAN; CAO, MINJUN; JIA, JUNXIANG; YANG, CHENGYU; LI, WENJUN; ZHOU, XIAOMAI; XIE, HONGSHENG; LIN, CHEN; GUO, ZHIXIANG; YE, ZHICANG
To: SUZHOU M-CONJ BIOTECH CO., LTD.; HANGZHOU DAC BIOTECH CO., LTD.
Reel/Frame 056836/0114 →
Continuity (2)
Continuation 16074981
Related Publication 20210346523A1 · Nov 11, 2021
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