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An anti-human epidermal growth factor receptor 2 (HER2)/anti-CD3 bispecific monoclonal antibody with potential immunostimulatory and antineoplastic activities. Anti-HER2/Anti-CD3 bispecific monoclonal antibody GBR 1302 possesses two antigen recognition sites, one for HER2, a tyrosine kinase receptor overexpressed by many cancer cell types, and one for the CD3 complex, a group of T-cell surface glycoproteins that interact with the T-cell receptor (TCR). Upon administration of GBR 1302, this bispecific monoclonal antibody simultaneously binds to both CD3-expressing T cells and HER2-expressing cancer cells, thereby crosslinking HER2-expressing tumor cells and cytotoxic T lymphocytes (CTLs). This may result in potent CTL-mediated lysis of HER2-expressing tumor cells. HER2 plays a key role in tumor cell proliferation and tumor vascularization. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C142889\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C142889\' NCI Thesaurus)
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