Relative luciferase activities measured in HEK293T cells following co-transfection with the luciferase report vectors and miR-215 mimic or NC. *P<0.05 compared with NC-transfected cells. miR-215, microRNA-215; NC, negative control; AKT1, AKT serine/threonine kinase 1; 3′UTR, 3′-untranslated region; Wt, wild-type; mut, mutant.