FOXP3 and breast carcinoma: Thus, FOXP3 and miR-155 expression are high in normal human breast epithelial cells (HMEC) where ZEB2 expression is low and conversely, where ZEB2 expression is high in the human breast cancer cell lines (BT549 and MDA-MB-231), FOXP3 and miR155 expression are low (Figure 2A–2C).