Radioimmunoconjugate

Pronunciation

Definition 1

A radioactive substance that carries radiation directly to cancer cells. A radioimmunoconjugate is made by attaching a radioactive molecule to an immune substance, such as a monoclonal antibody, that can bind to cancer cells. This may help kill cancer cells without harming normal cells. Radioimmunoconjugates may also be used with imaging to help find cancer cells in the body. (NCI Dictionary)

Definition 2

Monoclonal antibodies (MoAb) conjugated with radioisotopes, i.e., I-131, Y-90, T-99, or In-111. Using radioimmunoconjugates in radiotherapy or radioimaging has the advantage of targeting cells carrying specific antigens, thereby limiting toxic effects on normal cells. Tumor eradication can be achieved by either the antibody-mediated immune response or by only the cytotoxic activity of the radiation. (NCI Thesaurus)

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