NCI Drug Dictionary

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The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

zirconium Zr 89 trastuzumab
A radioimmunoconjugate containing the recombinant humanized monoclonal antibody trastuzumab labeled with the radioisotope zirconium Zr 89 with radioisotopic activity and potential use as an imaging agent. The trastuzumab moiety of zirconium Zr 89 trastuzumab binds with high affinity to the extracellular domain of human epidermal growth factor receptor 2 (HER2). Upon binding, the radioisotope moiety may be detected using positron emission tomography (PET), thereby allowing the imaging and quantification of HER2-expressing tumor cells. HER2, a tyrosine kinase client protein of heat shock protein 90 (Hsp90), may be overexpressed on the cell surfaces of various tumor cell types. Check for active clinical trials using this agent. (NCI Thesaurus)