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A mixture of two recombinant IgG1 antibodies directed against different epitopes in the epidermal growth factor receptor (EGFR) extracellular domain III, with potential antineoplastic activity. Anti-EGFR monoclonal antibody mixture Sym004 binds to the extracellular domain of EGFR, thereby preventing ligand binding. This may prevent activation and subsequent dimerization of the receptor; the decrease in receptor activation may result in an inhibition of downstream ERK and JNK signaling pathways and thus inhibition of EGFR-dependent tumor cell proliferation and metastasis. In addition, binding of Sym004 to EGFRs causes EGFR internalization and degradation. EGFR, a receptor tyrosine kinase, often is overexpressed on the cell surfaces of various solid tumor cell types. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C91381\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C91381\' NCI Thesaurus)
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