Effects of si-CD147 on MAPK expression in SMMC-7721 cells. p38, ERK1/2, and JNK MAP kinase expression levels were analyzed in SMMC-7721 cells, respectively. Western blot analysis showed that si-CD147 inhibited the phosphorylation level of SAP/JNK but had no effects on non-phosphorylation level of SAP/JNK (A). GAPDH (lower panel) served as a loading control. The graph (B) compares scanning signal intensity of phos-SAPK and non-phos-SAPK expression by ImageJ software.