Definition

A bispecific antibody directed against both human epidermal growth factor receptor (EGFR) and the co-stimulatory T-cell-specific surface glycoprotein CD28, with potential immunostimulating and antineoplastic activities. Upon administration of anti-EGFR/CD28 bispecific antibody REGN7075, this bispecific antibody binds to both CD28 on cytotoxic T lymphocytes (CTLs) and EGFR found on EGFR-expressing tumor cells. This activates and redirects CTLs to EGFR-expressing tumor cells, which may result in the CTL-mediated cell death of EGFR-expressing tumor cells. EGFR, a member of the epidermal growth factor receptor family, is overexpressed on various tumor cell types.