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Effect of HTHQ on l-DOPA-induced SOD activity in PC12 cells. PC12 cells were exposed to l-DOPA (100 and 200 μM) in the absence or presence of HTHQ (1, 10, and 100 μM) for 24 h. superoxide dismutase (SOD) activity was measured by SOD assay kit-WST. Results are expressed as the mean ± S.E.M. (n = 4). * p < 0.05 compared to the control level, # p < 0.05 compared to 100 µM L-DOPA-treated group, § p < 0.05 compared to 200 µM l-DOPA-treated group (ANOVA with post-hoc Tukey’s test).
