Objective To study the protective effect of hydrogen sulfide (H2S) on PC12 cells damage induced by oxidative stress. Methods Using H2O2 - induced PC12 cells damage as the model of neuron damage induced by oxidative stress,the cell shape and nuclear morphology were observed by nuclear staining with hoechst 33258, the proliferation of PC12 cells was observed by 3 - (4,5 - dimethylthiazol- 2 - yl) - 2, 5 - diphenyltetrazolium bro- mide( MTT)assay, the apoptosis of PC12 cells was detected by propidium iodide stain flow cytometry (FCM). Resu...