Figure 1.

The results of MTT assay showed that various concentrations of ginsenoside 20(S)-Rg3 and curcumin inhibited cell viability of MDA-MB-231 cells in a concentration-dependent manner, with and without 4 Gy radiation, at 24, 48, 72 hour. Effect of ginsenoside 20(S)-Rg3 and curcumin plus radiation on cell death(A): after 24 hour, (B): 48 hour, (C): 72 hour, and (D): combined effect Statistically significant differences were determined using Kruskal-Wallis test. The data were significant with respect to the control group (P<0.05) except for 10 µg/mL curcumin (P=0.520) and 10 µmol/L ginsenoside 20(S)-Rg3 (P=0.513) concentrations. W: Non-irradiated samples, R: Irradiated samples