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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.

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zirconium Zr 89-labeled anti-PIGF monoclonal antibody RO5323441
A radioimmunoconjugate comprised of the humanized IgG1 monoclonal antibody directed against placental growth factor (PlGF) and labeled with zirconium Zr 89 (Zr 89), with potential radiotracer activity upon positron emission tomography (PET) imaging. The monoclonal antibody moiety of RO5323441 binds to both PlGF-1 and -2, thereby preventing the binding of PlGF-1 and -2 to the vascular endothelial growth factor receptor-1 (VEGFR-1) and the subsequent activation of VEGFR-1. The radioisotope moiety of RO5323441 may be detected using PET, thereby allowing for visualization of the antibody’s distribution and PlGF expression. PlGF, a member of the VEGF sub-family and a key molecule in angiogenesis and vasculogenesis, is upregulated in many cancers.

Abbreviation:89Zr-RO5323441