Definition

A humanized monoclonal antibody directed against the tumor associated antigen (TAA) mucin-1 (MUC1), with potential antineoplastic activity. Upon administration, sontuzumab targets and binds to MUC1 expressed on the surface of tumor cells, which may activate the immune system to induce an antibody-dependent cellular cytotoxicity (ADCC) against MUC1-expressing tumor cells. MUC1, a glycoprotein overexpressed on the surface of a variety of cancer cells, plays a key role in tumor cell survival and proliferation.