Fig. 3.

Cell viabilities of H₂O₂-treated neuronal cells. Cell viability was measured by MTT assay in U87 (A), PC12 (B), SH-SY5Y (C), and NIH3T3 cells (D) at 12 and 24 h after different doses of H₂O₂ treatment (0, 50, 100, 200, 400 and 1000 µM). The data are shown as the means of six independent experiments together with the standard deviations of the means (M ± SD). Statistical calculations were performed by ANOVA via the Tukey post hoc test. The statistical significance value was **P < 0.01, compared with the untreated control at the same time-point. # indicates non-significance (P > 0.05). The presented significances were selected from multiple comparisons.