[Relationship between apoptotic effect of Resveratrol on KG-1 cells and expression of bcl-2/bax].

This study was aimed to explore the apoptotic effect of Resveratrol (RES) on KG-1 cells and the expression of bcl-2/bax in vitro, and to clarify the possible mechanism of apoptotic effect of RES on leukemia cells. After treating with different concentrations of RES, the suppressive effect of RES on proliferation of KG-1 cells was analyzed by MTT method. Transmission electron microscope technique were used to detect the apoptosis status of KG-1 cells. The cell cycle and apoptosis percentage of KG-1 cells treated with RES were detected by flow cytometry. The expressions of bcl-2, bax mRNA and protein were assessed by semiquantitative RT-PCR and flow cytometry. The results showed that RES could obviously inhibit proliferation of KG-1 cells (p < 0.05). Compared with the control group, the cell number in S phase of KG-1 cells treated with RES increased (p < 0.05), the apoptosis rate enhanced significantly (p < 0.01) and the expression level was down-regulated, while expression level of bax was obviously up-regulated (p < 0.01). It is concluded that RES significantly induces apoptosis of KG-1 cells in vitro, which is probably related to the down-regulation of bcl-2 expression and up-regulation of bax expression.