Fig. 1. Cytotoxicity of ginsenoside F₂ (F2) against human glioblastoma cell line U373MG. (A) Cytotoxic effects were quantified by cell viability with 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide. The values are expressed as the means±standard deviation (n=3). ^**, p<0.01, significantly different compared with control (no treatment by ginsenoside F2) by student’s test. (B) Cells were treated with the F2 for 24 h followed by staining with Hoechst 33342. The cell showing DNA condensation was shown. (C) DNA from cells treated by F2 was separated by 1.8% agarose gel electrophoresis of DNA. This was done at least twice using independently prepared DNA.