Bispecific antigen binding molecules comprising anti-FAP clone 212
The invention relates to novel bispecific antigen binding molecules, comprising (a) at least one antigen binding domain capable of specific binding to Fibroblast Activation Protein (FAP) comprising FAP clone 212 or variants thereof, and (b) at least one antigen binding domain capable of specific binding to CD40, and to methods of producing these molecules and to methods of using the same.
1. A bispecific antigen binding molecule, comprising
(a) at least one antigen binding domain capable of specific binding to CD40, and
(b) at least one antigen binding domain capable of specific binding to Fibroblast Activation Protein (FAP) comprising a heavy chain variable region (VHFAP) comprising (i) CDR-H1 comprising the amino acid sequence of SEQ ID NO:3, (ii) CDR-H2 comprising the amino acid sequence selected from the group consisting of SEQ ID NO:4, SEQ ID NO:11 and SEQ ID NO:12, and (iii) CDR-H3 comprising the amino acid sequence of SEQ ID NO:5, and a light chain variable region (V L FAP) comprising (iv) CDR-L1 comprising the amino acid sequence selected from the group consisting of SEQ ID NO:6, SEQ ID NO:13 and SEQ ID NO:14, (v) CDR-L2 comprising the amino acid sequence of SEQ ID NO:7, and (vi) CDR-L3 comprising the amino acid sequence of SEQ ID NO:8.
2. The bispecific antigen binding molecule of claim 1 , additionally comprising (c) a Fc region composed of a first and a second subunit capable of stable association.
3. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to FAP comprises a heavy chain variable region (V H FAP) comprising an amino acid sequence that is at least about 90% identical to the amino acid sequence of SEQ ID NO:9, and a light chain variable region (V L FAP) comprising an amino acid sequence that is at least about 90% identical to the amino acid sequence of SEQ ID NO:10.
4. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to FAP comprises a heavy chain variable region (V H FAP) comprising an amino acid sequence selected from the group consisting of SEQ ID NO:15, SEQ ID NO:16, SEQ ID NO:17, SEQ ID NO:18, SEQ ID NO:19 and SEQ ID NO:20, and
a light chain variable region (V L FAP) comprising an amino acid sequence selected from the group consisting of SEQ ID NO:21, SEQ ID NO:22, SEQ ID NO:23, SEQ ID NO:24, SEQ ID NO:25 and SEQ ID NO:26.
5. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to FAP comprises
(a) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:15 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:21,
(b) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:16 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:21,
(c) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:16 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:22, or
(d) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:19 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:25.
6. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises a heavy chain variable region (V H CD40) comprising (i) CDR-H1 comprising the amino acid sequence of SEQ ID NO:27, (ii) CDR-H2 comprising the amino acid sequence of SEQ ID NO:28, and (iii) CDR-H3 comprising the amino acid sequence of SEQ ID NO:29, and a light chain variable region (V L CD40) comprising (iv) CDR-L1 comprising the amino acid sequence of SEQ ID NO:30, (v) CDR-L2 comprising the amino acid sequence of SEQ ID NO:31, and (vi) CDR-L3 comprising the amino acid sequence of SEQ ID NO:32.
7. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises
(i) a heavy chain variable region (V H CD40) comprising the amino acid sequence selected from the group consisting of SEQ ID NO:37, SEQ ID NO:38, SEQ ID NO:39 and SEQ ID NO:40, and
(ii) a light chain variable region (V L CD40) comprising the amino acid sequence selected from the group consisting of SEQ ID NO:41, SEQ ID NO:42, SEQ ID NO:43, and SEQ ID NO:44.
8. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises
(i) a heavy chain variable region (V H CD40) comprising the amino acid sequence selected from the group consisting of SEQ ID NO:45, SEQ ID NO:46, SEQ ID NO:47, SEQ ID NO:48, SEQ ID NO:49 and SEQ ID NO:50, and
(ii) a light chain variable region (V L CD40) comprising the amino acid sequence selected from the group consisting of SEQ ID NO:51, SEQ ID NO:52, SEQ ID NO:53, and SEQ ID NO:54.
9. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises
(a) a VH comprising the amino acid sequence of SEQ ID NO:37 and a VL comprising the amino acid sequence of SEQ ID NO:41, or
(b) a VH comprising the amino acid sequence of SEQ ID NO:37 and a VL comprising the amino acid sequence of SEQ ID NO:42, or
(c) a VH comprising the amino acid sequence of SEQ ID NO:37 and a VL comprising the amino acid sequence of SEQ ID NO:43, or
(d) a VH comprising the amino acid sequence of SEQ ID NO:37 and a VL comprising the amino acid sequence of SEQ ID NO:44, or
(e) a VH comprising the amino acid sequence of SEQ ID NO:38 and a VL comprising the amino acid sequence of SEQ ID NO:41, or
(f) a VH comprising the amino acid sequence of SEQ ID NO:38 and a VL comprising the amino acid sequence of SEQ ID NO:42, or
(g) a VH comprising the amino acid sequence of SEQ ID NO:38 and a VL comprising the amino acid sequence of SEQ ID NO:43, or
(h) a VH comprising the amino acid sequence of SEQ ID NO:38 and a VL comprising the amino acid sequence of SEQ ID NO:44, or
(i) a VH comprising the amino acid sequence of SEQ ID NO:39 and a VL comprising the amino acid sequence of SEQ ID NO:41, or
(j) a VH comprising the amino acid sequence of SEQ ID NO:39 and a VL comprising the amino acid sequence of SEQ ID NO:42, or
(k) a VH comprising the amino acid sequence of SEQ ID NO:39 and a VL comprising the amino acid sequence of SEQ ID NO:43, or
(l) a VH comprising the amino acid sequence of SEQ ID NO:39 and a VL comprising the amino acid sequence of SEQ ID NO:44, or
(m) a VH comprising the amino acid sequence of SEQ ID NO:40 and a VL comprising the amino acid sequence of SEQ ID NO:41, or
(n) a VH comprising the amino acid sequence of SEQ ID NO:40 and a VL comprising the amino acid sequence of SEQ ID NO:42, or
(o) a VH comprising the amino acid sequence of SEQ ID NO:40 and a VL comprising the amino acid sequence of SEQ ID NO:43, or
(p) a VH comprising the amino acid sequence of SEQ ID NO:40 and a VL comprising the amino acid sequence of SEQ ID NO:44.
10. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises a VH comprising the amino acid sequence of SEQ ID NO:37 and a VL comprising the amino acid sequence of SEQ ID NO:41.
11. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises
(a) a VH comprising the amino acid sequence of SEQ ID NO:45 and a VL comprising the amino acid sequence of SEQ ID NO:51, or
(b) a VH comprising the amino acid sequence of SEQ ID NO:46 and a VL comprising the amino acid sequence of SEQ ID NO:51, or
(c) a VH comprising the amino acid sequence of SEQ ID NO:47 and a VL comprising the amino acid sequence of SEQ ID NO:51, or
(d) a VH comprising the amino acid sequence of SEQ ID NO:48 and a VL comprising the amino acid sequence of SEQ ID NO:51, or
(e) a VH comprising the amino acid sequence of SEQ ID NO:45 and a VL comprising the amino acid sequence of SEQ ID NO:52, or
(f) a VH comprising the amino acid sequence of SEQ ID NO:46 and a VL comprising the amino acid sequence of SEQ ID NO:52, or
(g) a VH comprising the amino acid sequence of SEQ ID NO:47 and a VL comprising the amino acid sequence of SEQ ID NO:52, or
(h) a VH comprising the amino acid sequence of SEQ ID NO:48 and a VL comprising the amino acid sequence of SEQ ID NO:52, or
(i) a VH comprising the amino acid sequence of SEQ ID NO:49 and a VL comprising the amino acid sequence of SEQ ID NO:53, or
(j) a VH comprising the amino acid sequence of SEQ ID NO:50 and a VL comprising the amino acid sequence of SEQ ID NO:53, or
(k) a VH comprising the amino acid sequence of SEQ ID NO:49 and a VL comprising the amino acid sequence of SEQ ID NO:54, or
(l) a VH comprising the amino acid sequence of SEQ ID NO:50 and a VL comprising the amino acid sequence of SEQ ID NO:54.
12. The bispecific antigen binding molecule of claim 1 , wherein the antigen binding domain capable of specific binding to CD40 comprises a VH comprising the amino acid sequence of SEQ ID NO:45 and a VL comprising the amino acid sequence of SEQ ID NO:51 or wherein the antigen binding domain capable of specific binding to CD40 comprises a VH comprising the amino acid sequence of SEQ ID NO:48 and a VL comprising the amino acid sequence of SEQ ID NO:51.
13. The bispecific antigen binding molecule of claim 1 , comprising
(i) at least one antigen binding domain capable of specific binding to CD40, comprising a heavy chain variable region (V H CD40) comprising the amino acid sequence of SEQ ID NO:37 and a light chain variable region (V L CD40) comprising the amino acid sequence of SEQ ID NO:41, and
(ii) at least one antigen binding domain capable of specific binding to FAP, comprising a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:15 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:21.
14. The bispecific antigen binding molecule of claim 2 , wherein the Fc region is an IgG Fc region, and wherein the IgG Fc region comprises one or more amino acid substitution that reduces the binding affinity of the antibody to an Fc receptor and/or effector function.
15. The bispecific antigen binding molecule of claim 2 , wherein the Fc region is of human IgG1 subclass with the amino acid mutations L234A, L235A and P329G (numbering according to Kabat EU index).
16. The bispecific antigen binding molecule of claim 1 , wherein the bispecific antigen binding molecule comprises
(a) at least two Fab fragments capable of specific binding to CD40 connected to a Fc region, and
(b) one antigen binding domain capable of specific binding to FAP connected to the C-terminus of the Fc region.
17. The bispecific antigen binding molecule of claim 1 , wherein the bispecific antigen binding molecule comprises
(a) at least two Fab fragments capable of specific binding to CD40 fused to a Fc region, and
(b) a cross-fab fragment capable of specific binding to FAP fused to the C-terminus of the Fc region.
18. The bispecific antigen binding molecule of claim 17 , wherein the cross-fab fragment capable of specific binding to FAP comprises a VH-Ckappa chain, and the VH-Ckappa chain of the cross-fab fragment is fused to the C-terminus of the Fc region.
19. The bispecific antigen binding molecule of claim 1 , wherein the bispecific antigen binding molecule comprises four Fab fragments capable of specific binding to CD40.
20. An antibody that specifically binds to FAP, wherein said antibody comprises a heavy chain variable region (V H FAP) comprising (i) CDR-H1 comprising the amino acid sequence of SEQ ID NO:3, (ii) CDR-H2 comprising the amino acid sequence selected from the group consisting of SEQ ID NO:4, SEQ ID NO:11 and SEQ ID NO:12, and (iii) CDR-H3 comprising the amino acid sequence of SEQ ID NO:5, and a light chain variable region (V L FAP) comprising (iv) CDR-L1 comprising the amino acid sequence selected from the group consisting of SEQ ID NO:6, SEQ ID NO:13 and SEQ ID NO:14, (v) CDR-L2 comprising the amino acid sequence of SEQ ID NO:7, and (vi) CDR-L3 comprising the amino acid sequence of SEQ ID NO:8.
21. The antibody of claim 20 , wherein said antibody comprises
(a) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:15 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:21,
(b) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:16 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:21,
(c) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:16 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:22, or
(d) a heavy chain variable region (V H FAP) comprising the amino acid sequence of SEQ ID NO:19 and a light chain variable region (V L FAP) comprising the amino acid sequence of SEQ ID NO:25.
22. Isolated nucleic acid encoding the antibody of claim 20 .
23. An expression vector comprising the isolated nucleic acid of claim 22 .
24. A host cell comprising the expression vector of claim 23 .
25. A method of producing an antibody, comprising culturing the host cell of claim 24 under conditions suitable for the expression of the antibody, and isolating the antibody.
26. A pharmaceutical composition comprising the antibody of claim 20 and a pharmaceutically acceptable carrier.
27. The pharmaceutical composition of claim 26 , further comprising an additional therapeutic agent.
28. A pharmaceutical composition comprising the bispecific antigen binding molecule of claim 1 and a pharmaceutically acceptable carrier.
29. The pharmaceutical composition of claim 28 , further comprising an additional therapeutic agent.
30. Isolated nucleic acid encoding the bispecific antigen binding molecule of claim 1 .
31. An expression vector comprising the isolated nucleic acid of claim 30 .
32. A host cell comprising the expression vector of claim 31 .
33. A method of producing a bispecific antigen binding molecule, comprising culturing the host cell of claim 31 under conditions suitable for the expression of the bispecific antigen binding molecule, and isolating the bispecific antigen binding molecule.
34. The bispecific antigen binding molecule of claim 14 , wherein the IgG Fc region is an IgG1 Fc region or an IgG4 Fc region.
35. A bispecific antigen binding molecule, comprising two light chains, each comprising the amino acid sequence of SEQ ID NO:66, one light chain comprising the amino acid sequence of SEQ ID NO:65, a first heavy chain comprising the amino acid sequence of SEQ ID NO:67, and a second heavy chain comprising the amino acid sequence of SEQ ID NO:68.
36. A bispecific antigen binding molecule comprising two light chains, each comprising the amino acid sequence of SEQ ID NO:62, one light chain comprising the amino acid sequence of SEQ ID NO:61, a first heavy chain comprising the amino acid sequence of SEQ ID NO:63, and a second heavy chain comprising the amino acid sequence of SEQ ID NO:64.