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  • A radioimmunoconjugate composed of pertuzumab, a humanized recombinant monoclonal antibody directed against the extracellular dimerization domain of the tyrosine kinase receptor human epidermal growth factor-2 (HER2; HER-2), and linked, via the chelator desferrioxamine (DFO), to the radioisotope zirconium Zr 89 (Zr89), with potential use in imaging of HER-2-expressing tumor cells upon positron emission tomography (PET). Upon administration of zirconium Zr 89-DFO-pertuzumab, the pertuzumab moiety targets and binds to HER-2. After binding and internalization into HER-2-expressing tumor cells, Zr89 facilitates the visualization and detection of HER-2-expressing tumor cells using PET. This assesses HER2-expression and may predict or evaluate the tumor\'s response to certain HER-2-targeting chemotherapeutics. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C133822\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C133822\' NCI Thesaurus)
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