Figure 7. piR-36741 affected the osteogenic differentiation of BMSCs by regulating BMP2 expression. BMSCs were infected with Lv-sh-piR-36741 alone or together with Lv-BMP2, and then cultured in osteogenic differentiation medium for 14 days. (A, B) The expression of piR-36741 and the protein levels of BMP2, p-Smad1/5/8 and Smad1/5/8 were measured on day 14. (C, D) The expression of METTL3, RUNX2, COL1A1, OCN and OPN were detected on day 14. (E) Images of ALP staining (100×). (F) ALP activity was determined on day 14. (G) Images of ARS staining (100×). (H) Quantitative analysis of ARS accumulation on day 14. N = 5 in each group. *P < 0.05. Each test was independently repeated at least three times.