H9c2 cells were pretreated with Dapa, and were then stimulated with PA for 1 h. a H9c2 cells were fixed and stained with anti-p-cJUN antibody, and counterstained with DAPI. Representative images were shown (scale bar = 25 μm). b Cell lysates were collected and proteins of p-ERK, p-JNK and p-p38 were detected with total proteins as loading control. c Cells were pretreated with Dapa, and were then stimulated with PA for 8 h. Total mRNA was isolated using TRIzol, and mRNA levels of pro-inflammatory genes were detected with β-actin as the normalization control. n = 3; Means ± SEM; One-way ANOVA followed by Turkey post-hoc tests; *P < 0.05, compared with Ctrl group, #P < 0.05, compared with PA group.