ERBB2 and breast cancer: In the EGFR+ HCC1937 cells, and also in basal-like EGFR+ and HER2+ HCC1954 breast cancer cells, the presence of EGF strongly enhanced both the basal and TGFβ-induced levels of subsets of these invasion genes, whereas HER2+ HCC202 cells showed similar result as MII cells (Fig. 1h and Supplementary Fig. S1e, f).