We next compared tumor cytotoxicity induced by α-TEA + anti-HER2/neu antibody using both murine HER2/neu+ (MMC) and HER2/neu- (ANV) and human HER2/neu+ (MDA-MB-453) and HER2/neu- (MDA-MB-231) breast cancer cell lines. The gene discussed is ERBB2; the disease is neoplasm.