Antitumor antagonists
Antitumor antagonists that bind specifically to immune checkpoint regulators, angiogenesis pathway regulators and/or TGF pathway regulators are disclosed. Also disclosed are methods for treating proliferative disorders, infections, and immunological disorders with the antitumor antagonists described herein.
1. A bispecific antibody comprising two heavy chains and two light chains, wherein each heavy chain comprises, from N-terminus to C-terminus, a VH domain, a CHI domain, a CH2 domain, a CH3 domain, a peptide linker and a TGF-ß1 RII extracellular domain (ECD), wherein each light chain comprises, from N-terminus to C-terminus, a VL domain and a CL domain, wherein the VH domain comprises the amino acid sequence of SEQ ID NO:90 or 96, wherein the VL domain comprises the amino acid sequence of SEQ ID NO:91, wherein the bispecific antibody binds specifically to (1) human VEGF-A through the VH and VL domains and (2) human TGFß1 through the TGF-ß1 RII extracellular domain (ECD), wherein the TGF-ß1 R11 ECD comprises the amino acid sequence of SEQ ID NO:89.
2. The bispecific antibody of claim 1 , wherein the VH domain comprises the amino acid sequence of SEQ ID NO:90.
3. The bispecific antibody of claim 1 , wherein the VH domain comprises the amino acid sequence of SEQ ID NO:96.
4. The bispecific antibody of claim 1 , wherein each heavy chain comprises an amino acid sequence selected from the group consisting of SEQ ID NOS:97, 98, 115-122 and 127-129.
5. The bispecific antibody of claim 3 , wherein each heavy chain comprises the amino acid sequence of SEQ ID NO:98.
6. The bispecific antibody of claim 1 , wherein the peptide linker comprises an amino acid sequence of SEQ ID NO: 101.