AR and posterior cortical atrophy: As illustrated in Fig. 1d, the results of western blotting showed that there were no significant difference in the expression level of AR among AR-positive LNCaP and C4-2 cells, AR-negative PC-3 cells and their miR-199b-5p and anti-miR-199b-5p-transfected counterparts, respectively (P < 0.05 for all), suggesting that miR-199b-5p has no effects on AR expression in PCa cells.