Figure 10.

Effect of n-acetylcysteine, an antioxidant on the cytotoxicity of Acanthopanax sessiliflorus stem bark extracts in the human breast cancer cells. MCF-7 cells were pre-treated with or without n-acetylcysteine (2 mM) for 1 h and then n-hexane fraction (50 and 100 μg/ml) for 24 h. Afterwards, the cell viability was determined by the colorimetric MTT assay. The results are expressed as percentage of the corresponding control. Results are represented as the mean ± SD from three independent experiments. ^∗Significant compared to control cells.