ZEB1 and breast cancer: miR-205 has recently been reported to increase radiosensitivity and enhance EMT via targeting ZEB1 in breast cancer SUM159, MCF-7 and MDA-MB-231 cell lines.32, 33 However, we did not observe any regulation of ZEB-1 upon expression of miR-205 in either drug-resistant MCF-7/A02 or CALDOX cells (Supplementary Figures S2A and B).