The competition between forkhead box protein O1 (FOXO1) and E‐cadherin (CDH1) for miR‐9 was reported wherein FOXO1 acted as a ceRNA resulting in inhibition of metastasis of breast cancer cells by inducing CDH1 expression (Yang et al., 2014; Zhou et al., 2014). This evidence concerns the gene FOXO1 and breast cancer.