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  • A bispecific monoclonal antibody directed against the human epidermal growth factor receptor ErbB3 (Her3) and the human insulin-like growth factor-1 receptor (IGF-1R), with potential antineoplastic activity. The anti-IGF-1R targeting arm of anti-IGF-1R/anti-ErbB3 bispecific monoclonal antibody MM-141 binds to IGF-1R on tumor cells thereby preventing the binding of the natural ligands IGF-1, 2 and heregulin (HRG) to IGF-1R; the anti-ErbB3 therapeutic arm prevents the binding of neuregulin (NRG) to ErbB3. This prevents the activation of the PI3K/AKT signal transduction pathway and may result in both the induction of apoptosis and a decrease in cellular proliferation in IGF-1R and ErbB3-overexpressing tumor cells. IGF-1R, a receptor tyrosine kinase of the insulin receptor superfamily, and ErB3, a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases, are frequently overexpressed in solid tumors. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C103863\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C103863\' NCI Thesaurus)
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