EZH1 was highly expressed in BCa. A. Relative level of EZH1 in BCa tissues and matched normal tissues (n = 66) (***P < 0.001, compared with normal group). B. Relative level of EZH1 in mammary epithelial cell line (MCF-10A) and BCa cell lines (MDA-MB-231, MCF-7 and SKBR3) (*P < 0.05, compared with MCF-10A group **P < 0.01, compared with MCF-10A group; ***P < 0.001, compared with MCF-10A group). C. A negative correlation between expression levels of miRNA-765 and EZH1 in 66 cases of LCa tissues. D. Relative level of EZH1 in MCF-7 and SKBR3 cells transfected with NC or miRNA-765 mimics (*P < 0.05, compared with NC group).