Figure 3. Apoptosis and necroptosis pathways could be converted to each other when one was inhibited.
(a) Cellular proteins were extracted after hypoxia for 24 hours in cultured H9c2 cells. Biotin switch method followed by Western blotting showed that Necrostatin-1 (nec-1, 100 μM), a specific blocker of necroptosis increased the level of cleaved caspase3. PEDF and 44mer could decrease the level of cleaved caspase3 in nec-1 group (n = 4; *P < 0.05 compare to corresponding hypoxia group and nec-1 group). (b) Z-VAD-FMK (20 μM), a cell permeable pan caspase inhibitor, could increase the RIP3 expression after 24 h hypoxia. PEDF and 44mer could also decrease the level of RIP3 in Z-VAD-FMK group. Blots were cropped and full length blots appear in the supplementary information. (n = 4; *P < 0.05 compare to corresponding hypoxia group and Z-VAD-FMK group). Data are represented as means ± S.E.M.