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  • A radiopharmaceutical agent composed of a dimeric cyclic arginine-glycine-aspartic acid (RGD)-based peptide (c[RGDyK]) and labeled, via the chelating agent 1,4,7-triazacyclononane,1-glutaric acid-4,7-acetic acid (NODAGA), with gallium Ga 68, with potential alphaVbeta3 (aVb3) integrin imaging activity upon positron emission topography (PET) or single photon emission computed tomography (SPECT). After intravenous administration of gallium Ga 68-NODAGA-E(c[RGDyK])2, the cyclic RGD moiety targets and binds to aVb3 integrin which is expressed on the cell membrane of tumor cells and tumor-resident endothelial cells. Upon imaging, aVb3 integrin-expressing cells can be visualized and expression levels can be quantified. This can be used to assess response to anti-angiogenic treatment. aVb3 integrin is overexpressed on certain tumor cells and tumor-resident endothelial cells, while minimally or not expressed on healthy, normal cells; aVb3 integrin plays a key role in angiogenesis, tumor proliferation and survival. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C132993\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C132993\' NCI Thesaurus)
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