Aim To investigate the injury effect of CoCl2 on N9 microglia and explore its mechanism.Methods N9 microglia was exposed to different doses of CoCl2 for 24h,the cell viability was assessed by XTT assay.Cellular morphological changes were observed under phase-contrast microscope.The MDA level in the cultured supernatant was detected with thiobarbituric acid(TBA) method.The cell apoptosis was evaluated by Hoechst 33258 staining.The cell cy-cle was detected by flow cytometry(FCM).Results CoCl2(50~1 000 μmol·L-...