Figure 3

Effects on intrinsic antioxidant capacity. Intracellular glutathione content in SH-SY5Y cells exposed to rotenone at 50 nM after 1 h pre-treatment with either A) methanol or B) ethyl acetate plant extracts following 24 h exposure period. Significant differences from the rotenone control are indicated by* representing p value < 0.05, while significant differences from vehicle controls are indicated by ■, also representing p value < 0.05. PC = positive control (minocycline); Rot = rotenone; Untr = Vehicle controls. (The dashed-line indicates intracellular glutathione levels in the vehicle controls while the dotted-line is indicative of intracellular glutathione content in cells exposed to rotenone alone).