Effects of polydatin on the expression of CCSP protein in rat lung. CCSP protein expression was examined by western blot. I: sham operation group; II: endotoxic shock group; III: PD treatment group; IV: PD pretreatment group; V: PD control group. A. The electrophoretogram of CCSP protein expression. B. Relative ratio of CCSP protein expression. bP < 0.05 and cP < 0.01 vs. group I; eP < 0.05 and fP < 0.01 vs. group II; iP < 0.05 vs. group III.