Fig. 4. PINK1 knockdown aggravated AOPP-induced osteoblast apoptosis.
A, B PINK1 knockdown by shRNA had no significant effect on the expression of cleaved PARP, BAX, cleaved Caspase-3, or cytochrome c in MC3T3-E1 cells. C, D Flow cytometry results showed that PINK1 knockdown further increased the cell apoptotic rate when stimulated with AOPPs, and the application of rapamycin did not reverse this trend. E–I Rapamycin failed to inhibit the upregulation of cleaved PARP, BAX and cytochrome c in AOPP-stimulated shPINK1 MC3T3-E1 cells. All experiments were repeated for at least three times. Data are presented as the mean ± SD. *#†P < 0.05 between connected groups. Clvd PARP cleaved PARP; Clvd Cas-3 cleaved Caspase-3; Cyt-C cytochrome c.