Abstract: The present application provides a method of treating tumor: administrating a HER2 inhibitor, and said subject comprises an alteration in a protein HER2, CDK12. The present application provides a medicinal product comprising: the HER2 inhibitor and the multiple CDK inhibitor, showing significant inhibition of tumor cell growth.

Abstract: The present disclosure provides a dimer formed by two polypeptide chains, with each of the two polypeptide chains comprising an antibody Fc subunit, wherein the dimer comprises two or more immunoglobulin single variable domains (ISVDs), at least one of the ISVDs is specific for PD-L1, and at least one of the ISVDs is specific for CTLA4.

Abstract: Disclosed are a method for treating a tumor using a CTLA4-binding protein and a use thereof, wherein the CTLA4-binding protein specifically binds to CTLA4 and does not compete with a ligand of CTLA4 for binding to CTLA4. The CTLA4-binding protein described in the present application can effectively inhibit tumor growth.

Abstract: The present application provides a bispecific antibody or an antibody mixture with common light chains and a preparation method therefor. the present application also provides a nucleic acid molecule encoding the antibody or the mixture, a recombinant vector and a recombinant cell comprising the nucleic acid molecule, as well as a detection and quantitation method for the antibody or the mixture.

Abstract: The disclosure is directed to a heterodimer molecule, comprising a first polypeptide chain and a second polypeptide chain, and the first polypeptide chain comprises a first CH3 domain of an antibody heavy chain constant region, the second polypeptide chain comprises a second CH3 domain of an antibody heavy chain constant region. Comparing to a corresponding wild-type CH3 domain of a human antibody heavy chain constant region, the first CH3 domain and the second CH3 domain comprise amino acid mutations at specific positions, for example T366+K409+K392 and T366+L368+Y407+D399+F405, respectively.

Abstract: The disclosure is directed to a heterodimer molecule, comprising a first polypeptide chain and a second polypeptide chain, and the first polypeptide chain comprises a first CH3 domain of an antibody heavy chain constant region, the second polypeptide chain comprises a second CH3 domain of an antibody heavy chain constant region. Comparing to a corresponding wild-type CH3 domain of a human antibody heavy chain constant region, the first CH3 domain and the second CH3 domain comprise amino acid mutations at specific positions, for example T366+K409+K392 and T366+L368+Y407+D399+F405, respectively.

Abstract: The present disclosure provides a dimer formed by two polypeptide chains, with each of the two polypeptide chains comprising an antibody Fc subunit, wherein the dimer comprises two or more immunoglobulin single variable domains (ISVDs), at least one of the ISVDs is specific for PD-L1, and at least one of the ISVDs is specific for CTLA4.

Abstract: The present disclosure provides a dimer formed by two polypeptide chains, with each of the two polypeptide chains comprising an antibody Fc subunit, wherein the dimer comprises two or more immunoglobulin single variable domains (ISVDs), at least one of the ISVDs is specific for PD-L1, and at least one of the ISVDs is specific for CTLA4.

Abstract: The present application provides a bispecific antibody or an antibody mixture with common light chains and a preparation method therefor. the present application also provides a nucleic acid molecule encoding the antibody or the mixture, a recombinant vector and a recombinant cell comprising the nucleic acid molecule, as well as a detection and quantitation method for the antibody or the mixture.

Abstract: A heterodimer molecule based on CH3, and a preparation method therefor and a use thereof. By comprehensively considering various interactions between molecules, for example, an ionic action, a hydrophobic interaction and a spatial action, a preferred Fc mutant sequence being more inclined to form a heterodimer rather than a homodimer is screened, and accordingly, the yield of the heterodimer molecule is greatly improved, thereby creating conditions for the preparation of bispecific molecules and the like.