# Anti-EGFR/HER2/HER3 Monoclonal Antibody Mixture Sym013

National Cancer Institute

## Source

National Cancer Institute. Anti-EGFR/HER2/HER3 Monoclonal Antibody Mixture Sym013. NCI Thesaurus. Code C131175.

An antibody mixture composed of six humanized, immunoglobulin G1 (IgG1) monoclonal antibodies directed against three members of the human epidermal growth factor receptor (EGFR; HER) family: EGFR (HER1; ErbB1), HER2 (ErbB2) and HER3 (ErbB3), with potential antineoplastic activity. Upon administration of anti-EGFR/HER2/HER3 monoclonal antibody mixture Sym013, the six antibodies bind to non-overlapping epitopes on EGFR, HER2 and HER3, which prevents both ligand binding and receptor activation, and induce simultaneous down-modulation of EGFR, HER2 and HER3. This inhibits the activation of HER-dependent signaling pathways and HER-dependent tumor cell proliferation. Overexpression of the HER family plays a key role in many cancers; targeting multiple HER family members simultaneously may increase therapeutic efficacy.