Resveratrol-induced tumor cell death is dependent on CD95-CD95L interaction. HL60 cells were preincubated for 1 hour with either anti-CD95 (1 μg/mL) or anti-CD95L (1 μg/mL) before the addition of 32 μmol/L resveratrol. Cell viability was determined following 24 hours incubation by the MTT assay, and data shown are mean ±SD of three independent experiments.