Western blot analysis showed that miR-513a-3p mimics reduced the abundance of BMP2 protein, while miR-513a-3p inhibitor promoted its levels in both PCa cells, indicating that BMP2 might be the target gene of miR-513a-3p likely regulated by circEPHA3 (Fig. 5A, B, Additional file 7: Fig. S3A, B). This evidence concerns the gene BMP2 and posterior cortical atrophy.