MDA-MB-231 cells are categorized into the basal-like subtype of breast cancer with high levels of ZEB1/2 expression and low levels of E-cadherin expression, whereas MCF7 cells are categorized into the luminal subtype with low levels of ZEB1/2 expression and high levels of E-cadherin expression8,15. This evidence concerns the gene ZEB1 and breast carcinoma.