The CEC cells were treated with various concentrations of RSV (0, 10, 20, 50, 100, and 200 µmol/L) for 48h. MTT assay was performed to evaluate the cell survival. No significant differences in OD reading values were seen at the concentration of RSV from 10 to 100 µmol/L compared with control without RSV application (P>0.05). The cell survival was reduced up to 200 µmol/L of RSV addition (aP<0.05). Values represent mean±SEM for 3 separate experiments (n=3).