ANTIGEN-BINDING MOLECULES CAPABLE OF BINDING CD3 AND CD137 BUT NOT SIMULTANEOUSLY

摘要

The present invention relates to antigen-binding molecules binding to CD3 and CD137 (4-1BB); compositions comprising the antigen-binding molecule; and methods of using the same. The present invention provides antigen-binding molecules comprising: an antibody variable region that is capable of binding to CD3 and CD137 (4-1BB), but does not bind to CD3 and CD137 at the same time; and a variable region binding to a third antigen different from CD3 and CD137. Such antigen binding molecules exhibit enhanced T-cell dependent cytotoxity activity induced by these antigen-binding molecules through binding to the three different antigens.