ERBB2 and breast cancer: In evaluation of the proliferation and migration of other breast cancer cell lines (basal-like subtype, MDA-MB-231 and HER2+/luminal-like subtype, SUM225) and normal mammary epithelial cell (MCF10A) in co-culture with hPreAd, an increase in proliferation and migration of MDA-MB-231 cell increased but not SUM225 and MCF10A cells (Additional file 1: Figure S2A and S2B).