Fig. 2
Effect of different structural procyanidins on MPP+-induced PC12 cell damage. (a) Effect of 2.5 μM procyanidins with different structures on the survival of MPP+-injured PC12 cells. (b) Effect of 5 μM procyanidins with different structures on the survival of MPP+-injured PC12 cells. (c) Effect of 2.5 μM procyanidins with different structures on MPP+-induced LDH release. (d) Effect of 5 μM procyanidins with different structures on MPP+-induced LDH release. Control, Blank control group; Model, MPP+ (1.5 mM); Positive control, Deprenyl (30 μM) + MPP+ (1.5 mM). Data are expressed as the mean ± SD. All experiments were conducted six times. Different letters (a–d) on the bar represent significant differences, while the same letters represent no significant differences (p < 0.05, one-way ANOVA).