a. FAK Inhibitor 14 could eliminate the pro-metastasis effect of STEAP4 silencing, indicated by the wound healing assay. Scale bar, 100 μm. b. Effect of STEAP4 overexpression on EMT in BC cells. c. and d. Effect of circPICALM silencing or overexpressing on EMT in BC cells. e. Effect of miR-1265 mimics on EMT in BC cells. (Data are presented as the mean ± SD, n = 3. Unpaired, two-tailed student's t-test, *P<0.05, **P<0.01).