C-Met antibody combinations
The invention provides a product combination or composition, and also multispecific antibodies comprising two or more antigen-binding sites (as antibodies or antigen binding fragments thereof), wherein two the antigen-binding bind to distinct non-overlapping epitopes of the human c-Met protein. The product combination or composition or multispecific antibody inhibits HGF-independent activation of the human c-Met receptor protein.
1. An isolated multispecific antibody comprising:
(a) a first antigen binding region comprising a first heavy chain variable (VH) domain paired with a first light chain variable (VL) domain, wherein the first antigen binding region binds to the PSI-IPT domain 1 region or the IPT domain 1 region of a human c-Met receptor; and
(b) a second antigen binding region comprising a second VH domain paired with a second VL domain, wherein the second antigen binding region binds to the SEMA domain of a human c-Met receptor,
wherein:
the first VH domain comprises a CDR3 comprising amino acid sequence SEQ ID NO:15, a CDR2 comprising amino acid sequence SEQ ID NO:14, and a CDR1 comprising amino acid sequence SEQ ID NO:13;
the first VL domain comprises a CDR3 comprising amino acid sequence SEQ ID NO:87, a CDR2 comprising amino acid sequence SEQ ID NO:23, and a CDR1 comprising amino acid sequence SEQ ID NO:86;
the second VH domain comprises a CDR3 comprising amino acid sequence SEQ ID NO:21, a CDR2 comprising amino acid sequence SEQ ID NO:83, and a CDR1 comprising amino acid sequence SEQ ID NO:19;
the second VL domain comprises a CDR3 comprising amino acid sequence SEQ ID NO:33, a CDR2 comprising amino acid sequence SEQ ID NO:32, and a CDR1 comprising amino acid sequence SEQ ID NO:31; and
the multispecific antibody inhibits hepatocyte growth factor (HGF)-independent activation of the human c-Met receptor.
2. A combination of two or more isolated monoclonal antibodies, or antigen-binding fragments thereof, comprising:
(a) a first monoclonal antibody, or antigen-binding fragment thereof, that binds to the PSI-IPT domain 1 region or IPT domain 1 region of a human c-Met receptor; and
(b) a second monoclonal antibody, or antigen-binding fragment thereof, that binds to the SEMA domain of a human c-Met receptor,
wherein:
the first monoclonal antibody or antigen-binding fragment thereof comprises a first heavy chain variable (VH) domain comprising a CDR3 comprising amino acid sequence SEQ ID NO:15, a CDR2 comprising amino acid sequence SEQ ID NO:14, and a CDR1 comprising amino acid sequence SEQ ID NO:13; and a first light chain variable (VL) domain comprising a CDR3 comprising amino acid sequence SEQ ID NO:87, a CDR2 comprising amino acid sequence SEQ ID NO:23, and a CDR1 comprising amino acid sequence SEQ ID NO:86;
the second monoclonal antibody or antigen-binding fragment thereof comprises a second VH domain comprising a CDR3 comprising amino acid sequence SEQ ID NO:21, a CDR2 comprising amino acid sequence SEQ ID NO:83, and a CDR1 comprising amino acid sequence SEQ ID NO:19; and a second VL domain comprising a CDR3 comprising amino acid sequence SEQ ID NO:33, a CDR2 comprising amino acid sequence SEQ ID NO:32, and a CDR1 comprising amino acid sequence SEQ ID NO:31; and
the combination inhibits hepatocyte growth factor (HGF)-independent activation of the human c-Met receptor.
3. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the antigen binding regions or the first and second antibodies are each strict antagonists of HGF-mediated activation of the c-Met receptor and wherein the combination of two or more monoclonal antibodies or multispecific antibody exhibits more potent antagonism of HGF-mediated activation of the c-Met receptor than the first antibody or antigen binding region alone and the second antibody or antigen binding region alone.
4. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the antigen binding regions or the first and second antibodies are each strict antagonists of HGF-mediated activation of the c-Met receptor and wherein the combination of two or more monoclonal antibodies or multispecific antibody exhibits a lesser degree of intrinsic agonist activity than the first antibody or antigen binding region alone and the second antibody or antigen binding region alone.
5. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the multispecific antibody or the first and second antibodies each comprises a hinge region having a fully human sequence, wherein the presence of the human hinge region does not adversely affect the antagonist activity of the multispecific antibody or combination.
6. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 ,
wherein the VH and VL domains, or one or more CDRs thereof, in either one or both of the antigen binding regions or antibodies, are camelid-derived.
7. The multispecific antibody or the combination of two or more monoclonal antibodies of claim 6 , wherein either one or both of the first and second antigen binding regions or antibodies comprises llama-derived VH and VL domains or human germlined variants of llama-derived VH and VL domains.
8. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the multispecific antibody or either one or both of the first and second antibodies displays one or more effector functions selected from the group consisting of antibody-dependent cell-mediated cytotoxicity (ADCC), complement-dependent cytotoxicity (CDC), and antibody-dependent cell-mediated phagocytosis (ADCP) against cells expressing human c-Met receptor on the cell surface.
9. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the multispecific antibody or either one or both of the first and second antibodies exhibits ADCC against c-Met-expressing or c-Met over-expressing cancer cells.
10. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the multispecific antibody or either one or both of the first and second antibodies exhibits enhanced ADCC function in comparison to an equivalent antibody comprising a native human Fc domain.
11. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the multispecific antibody or either one or both of the first and second antibodies comprises the hinge region, CH2 domain, and CH3 domain of a human IgG.
12. The multispecific antibody or combination of claim 11 , wherein the human IgG is IgG1.
13. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the multispecific antibody or either one or both of the first and second antibodies comprises a non-fucosylated IgG Fc domain.
14. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 which additionally:
(a) inhibits HGF-dependent activation of the human c-Met receptor protein;
(b) does not exhibit significant intrinsic agonist activity against the human c-Met receptor protein; and/or
(c) is a strict antagonist of HGF-mediated activation of the human c-Met receptor protein.
15. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the first VH domain comprises the amino acid sequence set forth as SEQ ID NO: 49.
16. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the first VL domain comprises the amino acid sequence set forth as SEQ ID NO: 89.
17. A pharmaceutical composition comprising the multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 and a pharmaceutically acceptable carrier or excipient.
18. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the second VH domain comprises an amino acid sequence set forth as SEQ ID NO: 94.
19. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein the second VL domain comprises an amino acid sequence set forth as SEQ ID NO: 95.
20. The multispecific antibody of claim 1 or the combination of two or more monoclonal antibodies of claim 2 , wherein
the first VH domain and the first VL domain comprise the amino acid sequences set forth in SEQ ID NOs: 49 and 89, respectively; and
the second VH domain and the second VL domain comprise the amino acid sequences set forth in SEQ ID NOs: 94 and 95, respectively.