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A human monoclonal antibody directed against the human epidermal growth factor receptor ErbB3 (Her3) with potential antineoplastic activity. Anti-ErbB3 receptor monoclonal antibody REGN1400 binds to ErbB3 and prevents neuregulin 1 ligand binding to ErbB3, which may result in an inhibition of ErbB3-dependent phosphatidylinositol-3 kinase (PI3K)/Akt signaling. This eventually leads to the inhibition of cellular proliferation and differentiation. ErbB3, a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases, is frequently overexpressed in a variety of solid tumors and its overexpression generally correlates with poor prognosis and tumor resistance. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C103859\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C103859\' NCI Thesaurus)
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