Definition

A radioimmunoconjugate consisting of anetumab, a human immunoglobulin G1 (IgG1) monoclonal antibody directed against the cell surface glycoprotein mesothelin, conjugated to the chelating agent corixetan, and labeled with the alpha-emitting radioisotope thorium Th 227, with potential antineoplastic activity. Upon administration of thorium Th 227 anetumab corixetan, the anetumab moiety binds to the tumor-associated antigen (TAA) mesothelin, delivering a cytotoxic dose of alpha radiation to cells expressing mesothelin.