[Effects of EGb 761 on the cell apoptosis induced by H2O2 in RIN-m beta cells].

OBJECTIVE: To investigate the effects of ginkgo biloba extract (EGb 761) on apoptosis induced by hydrogen peroxide (H2O2) in RIN-m beta-cells. METHODS: The apoptotic model was made by H2O2 exposed for six hours with a concentration of 500 micromol/L The cytotoxicity was measured by MTT. Hoechst 33258 fluorescent staining were used to detect the protective effect of EGb 761 on the apoptosis of RIN-m beta-cells induced by H2O2. Annexin V-PI double staining of Flow cytometry were used to detect apoptosis quantitively. RESULTS: Compare to control group, after exposed to 500 micromol/L H2O2 for 6 hours, the apoptosis rate incereased and cell survival rate were decreased considerably (P < 0.01). Pretreated for 10 hours with EGb 761, the flow cytometry results showed that the apoptosis rate decreased and cell survival rate were increased considerably (P < 0.01, compared to H2O2 control group). CONCLUSION: EGb 761 can decrease RIN-m beta-cells damage and apoptosis induced by H2O2.