Health / Medical Topics

    yttrium Y 90 DOTA anti-CEA monoclonal antibody M5A

    Pronunciation

    Definition 1

    A substance being studied in the treatment of some types of cancer. M5A is a monoclonal antibody that binds to a protein called CEA on the surface of some tumor cells. It is linked to a radioisotope called yttrium Y 90, which may help kill the cancer cells. Yttrium Y 90 DOTA anti-CEA monoclonal antibody M5A is a type of radioimmunoconjugate and a type of radiopharmaceutical. (NCI Dictionary)

    Definition 2

    A radioimmunoconjugate consisting of a monoclonal antibody directed against the human carcinoembryonic antigen (CEA) conjugated with the radioisotope yttrium 90 (Y-90) via the chelator tetra-azacyclododecanetetra-acetic acid (DOTA) with potential antineoplastic activity. The antibody moiety of yttrium Y 90 DOTA anti-CEA monoclonal antibody M5A binds to cells expressing the CEA antigen. Upon cellular internalization, this agent selectively delivers a cytotoxic dose of beta radiation. CEA, a tumor associated antigen, is overexpressed in many cancer types, including gastrointestinal, breast, non-small cell lung, and thyroid cancers. (NCI Thesaurus)




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