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ALA protected against 6-OHDA-induced damage of PC12 cells. (A) PC12 cells were incubated with different concentrations of 6-OHDA for 24 h. (B) PC12 cells were pretreated with ALA for 1 h and then exposed to 6-OHDA for 24 h. Data were expressed as the means ± SD analyzed by one-way ANOVA. Statistical significance: *P < 0.05, **P < 0.01 vs. the control group; #P < 0.05, ##P < 0.01 vs. the PD group.
