Figure 4. Triple treatment modulated apoptosis via regulating the MAPK family. Representative western blots of the apoptosis-related proteins and the quantification of (A) the PARP cleavage ratio (cleaved PARP/full length PARP), the phosphorylation level of (B) ERK, (C) JNK, and (D) p38. GAPDH was used as loading control. Data were presented as the mean ± standard deviation in triplicate. *P < 0.05, **P < 0.01, ***P < 0.001, comparison between indicated groups.