Figure 1. Synergistic effects of As₂O₃ (As) and resveratrol (Res) on suppression of SK-N-SH cells viability. A: SK-N-SH cells were treated with 75 μg/ml resveratrol, 2 μM As₂O₃ or As₂O₃ plus resveratrol for 0-48 h and cell viability was determined applying 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide (MTT) assay. The results represent the mean±S.D. of three independent experiments. B: Cytotoxic effect of 0, 0.5, 1,2, 3 or 4 μM of As₂O₃ with and without 75 μg/ml resveratrol on SK-N-SH cells at 48 h were determined by the MTT assay. Results represent the mean±S.D. of three independent experiments. Significantly different at *p<0.05 and **p<0.01.