Claudin-6 bispecific antibodies
AssigneeThe Regents of the University of California
InventorsDylan Conklin, Martina S. McDermott, Neil A. O'Brien, Michael J. Palazzolo, Dennis Slamon, Erika Von Euw, Peter Bowers
Life of this patent
Estimating the term…
Abstract
The present disclosure provides bispecific antigen-binding proteins which bind to Claudin-6 (CLDN6) and a second antigen. In various aspects, the antigen-binding proteins bind to Extracellular Loop 2 (EL2) of the extracellular domain of CLDN6. Related polypeptides, nucleic acids, vectors, host cells, and conjugates are further provided herein. Kits and pharmaceutical compositions comprising such entities are moreover provided. Also provided are methods of making an antigen-binding protein and methods of treating a subject having cancer.
Claims105
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, wherein:
- a. the antigen-binding protein binds to Extracellular Loop 2 (EL2) of an extracellular domain (ECD) of CLDN6 and does not bind to Extracellular Loop 1 (EL1) of the ECD of CLDN6;
- or
- b. does not bind to any of Claudin3 (CLDN3), Claudin4 (CLDN4), and Claudin9 (CLDN9) and inhibits binding of a reference antibody to CLDN6 endogenously expressed by OVCA429 cells with less than about 1200 nM;
- or
- c. a combination thereof.
The bispecific antigen-binding protein of any one of the previous claims, wherein the reference antibody comprises a light chain variable sequence of SEQ ID NO:
- 181 and a heavy chain variable sequence of SEQ ID NO:
- 182 or a light chain variable sequence of SEQ ID NO:
- 185 and a heavy chain variable sequence of SEQ ID NO:
- 186.
The bispecific antigen-binding protein of any one of the previous claims comprising:
- a. a heavy chain CDR1 amino acid sequence set forth in Table A or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 11, 17, 23, 29, 35, 41, 47, 53, 59, 65, 71, 77, 83, 89, 95, 101, 107, 113, 119, 125, and 131, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- b. a heavy chain CDR2 amino acid sequence set forth in Table A or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, 86, 102, 108, 114, 120, 126, and 132, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- c. a heavy chain CDR3 amino acid sequence set forth in Table A or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 13, 19, 25, 31, 37, 43, 49, 55, 61, 67, 73, 79, 85, 91, 97, 103, 109, 115, 121, 127, and 133, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- d. a light chain CDR1 amino acid sequence set forth in Table A or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 8, 14, 20, 32, 38, 44, 50, 56, 62, 68, 74, 80, 86, 92, 98, 104, 110, 116, 122, and 128, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- e. a light chain CDR2 amino acid sequence set forth in Table A or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 9, 15, 21, 27, 33, 39, 45, 51, 57, 63, 69, 75, 81, 87, 93, 99, 105, 111, 117, 123, and 129, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- f. a light chain CDR3 amino acid sequence set forth in Table A or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 10, 16, 22, 28, 34, 40, 46, 52, 58, 64, 70, 76, 82, 88, 94, 100, 106, 112, 118, 124, and 130, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- g. a combination of any two or more of (a)-(f).
The bispecific antigen-binding protein of any one of claims 12-19, comprising:
- a. a heavy chain variable region amino acid sequence set forth in in Table B or a sequence selected from the group consisting of:
- 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, and 175, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- b. a light chain variable region amino acid sequence set forth in in Table B or a sequence selected from the group consisting of:
- 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, and 176, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- c. both (a) and (b).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises (a) an HC CDR1 amino acid sequence set forth in Table A or A1 or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 11, 17, 23, 29, 35, 41, 47, 53, 59, 65, 71, 77, 83, 89, 95, 101, 107, 113, 119, 125, 131, 452, 455, 461, 465, and 472, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- (b) an HC CDR2 amino acid sequence set forth in Table A or A1 or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, 78, 84, 90, 86, 102, 108, 114, 120, 126, 132, 475, 456, 462, 466, 468, and 473;
- or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- (c) an HC CDR3 amino acid sequence set forth in Table A or A1 or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 13, 19, 25, 31, 37, 43, 49, 55, 61, 67, 73, 79, 85, 91, 97, 103, 109, 115, 121, 127, 133, 453, 457, 463, 467, 469, and 474;
- or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- (d) a LC CDR1 amino acid sequence set forth in Table A or A1 or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 8, 14, 20, 32, 38, 44, 50, 56, 62, 68, 74, 80, 86, 92, 98, 104, 110, 116, 122, 128, 449, 476, 458, 464, and 470;
- or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- (e) an LC CDR2 amino acid sequence set forth in Table A or A1 or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 9, 15, 21, 27, 33, 39, 45, 51, 57, 63, 69, 75, 81, 87, 93, 99, 105, 111, 117, 123, 129, 450, 477, 459, and 471;
- or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- (f) an LC CDR3 amino acid sequence set forth in Table A or A1 or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 10, 16, 22, 28, 34, 40, 46, 52, 58, 64, 70, 76, 82, 88, 94, 100, 106, 112, 118, 124, 130, 451, 454, and 460, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or (g) a combination of any two or more of (a)-(f).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises six CDR amino acid sequences selected from the group consisting of:
- a. SEQ ID NOs:
- 74-79;
- b. SEQ ID NOs:
- 50-55;
- c. SEQ ID NOs:
- 122-127;
- d. SEQ ID NOs:
- 26-31;
- e. SEQ ID NOs:
- 128-133;
- f. SEQ ID NOs:
- 38-43;
- g. SEQ ID NOs:
- 62-67;
- h. SEQ ID NOs:
- 80-85;
- i. SEQ ID NOs:
- 44-49;
- j. SEQ ID NOs:
- 86-91;
- k. SEQ ID NOs:
- 104-109;
- l. SEQ ID NOs:
- 56-61;
- m. SEQ ID NOs:
- 32-37;
- n. SEQ ID NOs:
- 110-115;
- o. SEQ ID NOs:
- 98-103;
- p. SEQ ID NOs:
- 92-97;
- q. SEQ ID NOs:
- 116-121;
- r. SEQ ID NOs:
- 8-13;
- s. SEQ ID NOs:
- 68-73;
- t. SEQ ID NOs:
- 14-19;
- u. SEQ ID NOs:
- 20-25;
- v. SEQ ID NOs:
- 449-453 and 475;
- w. SEQ ID NOs:
- 476-477, 454-457;
- x. SEQ ID NOs:
- 458-463;
- y. SEQ ID NOs:
- 57, 58, 464-467;
- z. SEQ ID NOs:
- 68-71 and 468-469;
- and
- aa. SEQ ID NOs:
- 112, and 470-474.
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- a. a heavy chain variable region amino acid sequence set forth in in Table B or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, and 175, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- b. a light chain variable region amino acid sequence set forth in in Table B or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 134, 136, 138, 140, 142, 144, 146, 148, 150, 152, 154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, and 176, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- c. both (a) and (b).
An bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises a pair of amino acid sequences selected from the group consisting of:
- a. SEQ ID NOs:
- 156 and 157;
- b. SEQ ID NOs:
- 148 and 149;
- c. SEQ ID NOs:
- 172 and 173;
- d. SEQ ID NOs:
- 140 and 141;
- e. SEQ ID NOs:
- 174 and 175;
- f. SEQ ID NOs:
- 144 and 145;
- g. SEQ ID NOs:
- 152 and 153;
- h. SEQ ID NOs:
- 158 and 159;
- i. SEQ ID NOs:
- 146 and 147;
- j. SEQ ID NOs:
- 160 and 161;
- k. SEQ ID NOs:
- 166 and 167;
- l. SEQ ID NOs:
- 150 and 151;
- m. SEQ ID NOs:
- 142 and 143;
- n. SEQ ID NOs:
- 168 and 169;
- o. SEQ ID NOs:
- 164 and 165;
- p. SEQ ID NOs:
- 162 and 163;
- q. SEQ ID NOs:
- 170 and 171;
- r. SEQ ID NOs:
- 134 and 135;
- s. SEQ ID NOs:
- 154 and 155;
- t. SEQ ID NOs:
- 136 and 137;
- and
- u. SEQ ID NOs:
- 138 and 139.
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- a. a heavy chain variable region amino acid sequence set forth in Table C or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 376-379, 384-387, 391-396, 403-408, 412-413, 416-419, and 422-427, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- b. a light chain variable region amino acid sequence set forth in in Table C or a sequence selected from the group consisting of:
- SEQ ID NOs:
- 380-383, 388-390, 397-402, 409-411, 414-415, and 420-421, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- c. both (a) and (b).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises a pair of amino acid sequences selected from the group consisting of:
- a. SEQ ID NOs:
- 376 and 380;
- b. SEQ ID NOs:
- 377 and 380;
- c. SEQ ID NOs:
- 377 and 381;
- d. SEQ ID NOs:
- 377 and 382;
- e. SEQ ID NOs:
- 377 and 383;
- f. SEQ ID NOs:
- 378 and 381;
- g. SEQ ID NOs:
- 378 and 382;
- h. SEQ ID NOs:
- 378 and 383;
- i. SEQ ID NOs:
- 379 and 381;
- j. SEQ ID NOs:
- 379 and 382;
- k. SEQ ID NOs:
- 379 and 383;
- l. SEQ ID NOs:
- 384 and 388;
- m. SEQ ID NOs:
- 385 and 388;
- n. SEQ ID NOs:
- 385 and 389;
- o. SEQ ID NOs:
- 386 and 388;
- p. SEQ ID NOs:
- 386 and 389;
- q. SEQ ID NOs:
- 387 and 389;
- r. SEQ ID NOs:
- 422 and 389;
- s. SEQ ID NOs:
- 391 and 397;
- t. SEQ ID NOs:
- 392 and 397;
- u. SEQ ID NO:
- 393 and 398;
- v. SEQ ID NO:
- 394 and 398;
- w. SEQ ID NO:
- 395 and 398;
- x. SEQ ID NO:
- 396 and 398;
- y. SEQ ID NO:
- 423 and 398;
- z. SEQ ID NO:
- 424 and 398;
- aa. SEQ ID NO:
- 425 and 398;
- bb. SEQ ID NO:
- 426 and 398
- cc. SEQ ID NO:
- 427 and 398;
- dd. SEQ ID NO:
- 403 and 409;
- ee. SEQ ID NO:
- 404 and 409;
- ff. SEQ ID NO:
- 405 and 410;
- gg. SEQ ID NO:
- 405 and 411;
- hh. SEQ ID NO:
- 406 and 410;
- ii. SEQ ID NO:
- 406 and 411;
- jj. SEQ ID NO:
- 407 and 410;
- kk. SEQ ID NO:
- 407 and 411;
- ll. SEQ ID NO:
- 408 and 410;
- mm. SEQ ID NO:
- 408 and 411;
- nn. SEQ ID NO:
- 412 and 414;
- oo. SEQ ID NO:
- 413 and 414;
- pp. SEQ ID NO:
- 416 and 420;
- qq. SEQ ID NO:
- 417 and 420;
- rr. SEQ ID NO:
- 417 and 421;
- ss. SEQ ID NO:
- 418 and 420;
- tt. SEQ ID NO:
- 418 and 421;
- uu. SEQ ID NO:
- 419 and 420;
- and
- vv. SEQ ID NO:
- 419 and 421;
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- (A) an HC CDR1 comprising the amino acid sequence of YTFTXYT, wherein X is T, V, D, or S (SEQ ID NO:
- 452), optionally, comprising the amino acid sequence of YTFTTYT (SEQ ID NO:
- 11);
- (B) an HC CDR2 comprising the amino acid sequence of IXPSSGYT, wherein X is Q, S, A, or N (SEQ ID NO:
- 475), optionally, comprising the amino acid sequence of INPSSGYT (SEQ ID NO:
- 12);
- (C) an HC CDR3 comprising the amino acid sequence of AXGDYYVAY, wherein X is N, Q, H, or D (SEQ ID NO:
- 453), optionally, comprising the amino acid sequence of ANGDYYVAY (SEQ ID NO:13);
- (D) an LC CDR1 comprising the amino acid sequence of SSVSSXY, wherein X is T, V, F, or D (SEQ ID NO:
- 449), optionally, comprising the amino acid sequence of SSVSSTY (SEQ ID NO:
- 8);
- (E) an LC CDR2 comprising the amino acid sequence of XTX, wherein X at position 1 is S, T, Q, or A and X at position 3 is S, T, D, or Q (SEQ ID NO:
- 450), optionally, comprising the amino acid sequence of STS (SEQ ID NO:
- 9), and
- (F) an LC CDR3 comprising the amino acid sequence of HXYXRSPLT, wherein X at position 2 is Q, H, or S and X at position 4 is H, Y, Q, or S (SEQ ID NO:
- 451), optionally, comprising the amino acid sequence of HQYHRSPLT (SEQ ID NO:
- 10).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- (A) an HC CDR1 comprising the amino acid sequence of FTFSXYX, wherein X at position 5 is N, S, R, Q, or A and X at position 7 is W, H, Y, F (SEQ ID NO:
- 455), optionally, comprising the amino acid sequence of FTFSNYW (SEQ ID NO:
- 23);
- (B) an HC CDR2 comprising the amino acid sequence of IRLKXDXYAT, wherein X at position 5 is S, N, A, or T and X at position 7 is Q, S, A, N (SEQ ID NO:
- 456), optionally, comprising the amino acid sequence of IRLKSDNYAT (SEQ ID NO:
- 24);
- (C) an HC CDR3 comprising the amino acid sequence of XDGPPSGX, wherein X at position 1 is N, D, or T and X at position 8 is S, T, A, C, or Y (SEQ ID NO:
- 457), optionally, comprising the amino acid sequence of NDGPPSGC (SEQ ID NO:
- 25);
- (D) an LC CDR1 comprising the amino acid sequence of EXIYSY, wherein X is Q, S, A, D, or N (SEQ ID NO:
- 476), optionally, comprising the amino acid sequence of ENIYSY (SEQ ID NO:
- 20);
- (E) an LC CDR2 comprising the amino acid sequence of XAK, wherein X at position 1 is Q, S, A, D, or N (SEQ ID NO:
- 477), optionally, comprising the amino acid sequence of NAK (SEQ ID NO:
- 21);
- and
- (F) an LC CDR3 comprising the amino acid sequence of QXHYXVPWT, wherein X at position 2 is H, Q, S, or T and X at position 5 is T, S, N, or G (SEQ ID NO:
- 454), optionally, comprising the amino acid sequence of QHHYTVPWT (SEQ ID NO:
- 22).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- (A) an HC CDR1 comprising the amino acid sequence of YTXTXYT, wherein X at position 3 is F, Y, S, or T and X at position 5 is S, T, Y, or D (SEQ ID NO:
- 461), optionally, comprising the amino acid sequence of YTFTSYT (SEQ ID NO:
- 29);
- (B) an HC CDR2 comprising the amino acid sequence of IXPSSXYT, wherein X at position 2 is Q, S, A, or N and X at position 6 is T, S, V, D, or G (SEQ ID NO:
- 462), optionally, comprising the amino acid sequence of INPSSTYT (SEQ ID NO:
- 30);
- (C) an HC CDR3 comprising the amino acid sequence of XRGEXGGFAY, wherein X at position 1 is S, A, T, or V and X at position 5 is L, V, or F (SEQ ID NO:
- 463), optionally, comprising the amino acid sequence of SRGELGGFAY (SEQ ID NO:
- 31);
- (D) an LC CDR1 comprising the amino acid sequence of QSLVHSXGXTY, wherein X at position 7 is D, N, E, Q, S, or A and X at position 9 is Q, S, A, D, or N (SEQ ID NO:
- 458), optionally, comprising the amino acid sequence of QSLVHSDGNTY (SEQ ID NO:
- 26);
- (E) an LC CDR2 comprising the amino acid sequence of XVX, wherein X at position 1 is K, Q, or R and X at position 3 is S, T, or V (SEQ ID NO:
- 459), optionally, comprising the amino acid sequence of KVS (SEQ ID NO:
- 27);
- and
- (F) an LC CDR3 comprising the amino acid sequence of SXXTHVPYT, wherein X at position 2 is Q, H, or T and X at position 3 is S, G, T, or D (SEQ ID NO:
- 460), optionally, comprising the amino acid sequence of SQSTHVPYT (SEQ ID NO:
- 28).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises
- a. a heavy chain CDR1 amino acid sequence of:
- SEQ ID NO:
- 504 or SEQ ID NO:
- 507, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- b. a heavy chain CDR2 amino acid sequence of:
- SEQ ID NOs:
- 505 or SEQ ID NO:
- 508, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- c. a heavy chain CDR3 amino acid sequence of:
- SEQ ID NO:
- 506 or SEQ ID NO:
- 509, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- d. a light chain CDR1 amino acid sequence of:
- SEQ ID NO:
- 449 or SEQ ID NO:
- 476, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- e. a light chain CDR2 amino acid sequence of:
- SEQ ID NO:
- 450 or SEQ ID NO:
- 477, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- f. a light chain CDR3 amino acid sequence of:
- SEQ ID NO:
- 451 or SEQ ID NO:
- 454, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- g. a combination of any two or more of (a)-(f).
An bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises six CDR amino acid sequences selected from the group consisting of:
- a. SEQ ID NOs:
- 449-451 and 504-506;
- and
- b. SEQ ID NOs:
- 476, 477, 454 and 507-509.
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- a. a heavy chain variable region amino acid sequence of any one of SEQ ID NOs:
- 490-503, or a heavy chain variable region amino acid sequence labeled as S1-S12 in FIG. 22, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- b. a light chain variable region amino acid sequence of any one of SEQ ID NOs:
- 380-383, 388-390, 479, and 481, or a light chain variable region amino acid sequence labeled as S1-S12 in FIG. 22, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- c. both (a) and (b).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises a pair of amino acid sequences selected from the group consisting of:
- a. SEQ ID NOs:
- 389 and 490;
- b. SEQ ID NOs:
- 389 and 491;
- c. SEQ ID NOs:
- 389 and 492;
- d. SEQ ID NOs:
- 389 and 493;
- e. SEQ ID NOs:
- 389 and 494;
- f. SEQ ID NOs:
- 389 and 495;
- g. SEQ ID NOs:
- 383 and 496;
- h. SEQ ID NOs:
- 383 and 497;
- i. SEQ ID NOs:
- 383 and 498;
- j. SEQ ID NOs:
- 383 and 499;
- k. SEQ ID NOs:
- 383 and 500;
- l. SEQ ID NOs:
- 383 and 501;
- m. SEQ ID NOs:
- 383 and 503;
- n. SEQ ID NOs:
- 389 and 502;
- o. the heavy chain variable region sequence labeled as S1 in FIG. 22 and the light chain variable region sequence labeled as S1 in FIG. 22;
- p. the heavy chain variable region sequence labeled as S2 in FIG. 22 and the light chain variable region sequence labeled as S2 in FIG. 22;
- q. the heavy chain variable region sequence labeled as S3 in FIG. 22 and the light chain variable region sequence labeled as S3 in FIG. 22;
- r. the heavy chain variable region sequence labeled as S4 in FIG. 22 and the light chain variable region sequence labeled as S4 in FIG. 22;
- s. the heavy chain variable region sequence labeled as S5 in FIG. 22 and the light chain variable region sequence labeled as S5 in FIG. 22;
- t. the heavy chain variable region sequence labeled as S6 in FIG. 22 and the light chain variable region sequence labeled as S6 in FIG. 22;
- u. the heavy chain variable region sequence labeled as S7 in FIG. 22 and the light chain variable region sequence labeled as S7 in FIG. 22;
- v. the heavy chain variable region sequence labeled as S78 in FIG. 22 and the light chain variable region sequence labeled as S8 in FIG. 22;
- w. the heavy chain variable region sequence labeled as S89 in FIG. 22 and the light chain variable region sequence labeled as S9 in FIG. 22;
- x. the heavy chain variable region sequence labeled as S910 in FIG. 22 and the light chain variable region sequence labeled as S10 in FIG. 22;
- y. the heavy chain variable region sequence labeled as S11 in FIG. 22 and the light chain variable region sequence labeled as S11 in FIG. 22;
- or
- z. the heavy chain variable region sequence labeled as S12 in FIG. 22 and the light chain variable region sequence labeled as S12 in FIG. 22.
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises:
- a. a heavy chain variable region amino acid sequence set forth as SEQ ID NO:
- 510 or 513 or in FIG. 23 or 25, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- b. a light chain variable region amino acid sequence set forth as SEQ ID NO:
- 511 or 512 or in FIG. 24 or 26, or a variant sequence thereof which differs by only one or two amino acids or which has at least or about 70% sequence identity;
- or
- c. both (a) and (b).
A bispecific antigen-binding protein that binds to a human Claudin6 (CLDN6) protein (SEQ ID NO:
- 200), and a second antigen, and comprises a pair of amino acid sequences wherein the pair comprises
- a. a heavy chain variable region amino acid sequence set forth as SEQ ID NO:
- 510 and a light chain variable region amino acid sequence set forth as SEQ ID NO:
- 511, or a variant sequence thereof which differs by only 1-5 amino acids or which has at least or about 70% sequence identity;
- optionally, wherein the 1-5 amino acids which differ are as shown in FIG. 23 for the heavy chain or FIG. 24 for the light chain, or
- b. a heavy chain variable region amino acid sequence set forth as SEQ ID NO:
- 513 and a light chain variable region amino acid sequence set forth as SEQ ID NO:
- 512, or a variant sequence thereof which differs by only 1-5 amino acids or which has at least or about 70% sequence identity;
- or optionally, wherein the 1-5 amino acids which differ are as shown in FIG. 25 for the heavy chain or FIG. 26 for the light chain.
The bispecific antigen-binding protein of any one of the previous claims, comprising a Fc polypeptide comprising an afucosylated glycan.
The bispecific antigen-binding protein of any one of the previous claims, which inhibits at least about 50% colony growth in a soft agar 3D proliferation assays.
The bispecific antigen-binding protein of any one of the previous claims, which inhibits tumor growth in xenograft mice injected with human cancer cells.
The bispecific antigen-binding protein of any one of the previous claims, comprising an antigen binding fragment of an antibody specific for the second antigen.
The bispecific antigen-binding protein of any one of the previous claims wherein the second antigen is a cell surface protein expressed by a T-cell, optionally, a component of the T-cell receptor (TCR), for example, CD3.
The bispecific antigen-binding protein of any one of the previous claims, wherein the second antigen is a costimulatory molecule which assists in T-cell activation, e.g., CD40 or 4-1BB (CD137).
The bispecific antigen-binding protein of any one of the previous claims wherein the second antigen is an Fc receptor, optionally, a Fc gamma receptor, Fc-alpha receptor, or Fc-epsilon receptor.
The bispecific antigen-binding protein of any one of the previous claims wherein the Fc receptor is CD64 (Fc-gamma RI), CD32 (Fc-gamma RIIA), CD16A (Fc-gamma RIA), CD16b (Fc-gamma RIIIb), FcεRI, CD23 (Fc-epsilon RII), CD89 (Fc-epsilon RI), Fcα/μR, or FcRn.
The bispecific antigen-binding protein of any one of the previous claims wherein the Fc receptor is CD16A.
The bispecific antigen-binding protein of any one of the previous claims wherein the second antigen is an immune checkpoint molecule, e.g., a protein involved in the immune checkpoint pathway, optionally, A2AR, B7-113, B37-14, BTLA, CTLA4, IDO, KIR, LAG3, NOX2, PD-1, TIM3, VISTA, or SIGLEC7.
The bispecific antigen-binding protein of any one of the previous claims wherein the immune checkpoint molecule is PD-1, LAG3, TIM3, or CTLA4.
The bispecific antigen-binding protein of any one of the previous claims, comprising an scFv, a Fab, or a F(ab)2′ of any of the presently disclosed CLDN6 antibodies, optionally, wherein the scFv comprises a sequence of SEQ ID NO:
- 514 or 515 or a sequence as shown in FIG. 37B.
The bispecific antigen-binding protein of any one of the previous claims, comprising a structure of a nanobody, a BiTE®, DART, TandAb, CrossMab, or HSAbody.
The bispecific antigen-binding protein of any one of the previous claims wherein the second antigen is CD3.
The bispecific antigen-binding protein of any one of the previous claims wherein the second antigen is CD3E.
A conjugate comprising a bispecific antigen-binding protein of any one of the previous claims or described herein.
A fusion protein comprising a bispecific antigen-binding protein of any one of the previous claims.
Dependencies are inferred from the claim text.