NCIt definition : An IgG1k fully human monoclonal antibody directed against the human prostate stem
cell antigen (PSCA) with potential antineoplastic activity. Anti-PSCA fully human
monoclonal antibody MK4721 selectively targets and binds to PSCA, triggering complement-dependent
cell lysis and antibody-dependent cell-mediated cytotoxicity in tumor cells expressing
PSCA. PSCA is a glycosyl-phosphatidylinositol (GPI)-linked cell surface antigen found
in cancers of the bladder, pancreas, and prostate.;