Cell death assay results in SHR and WKY. Cell death assay results in (1A) hippocampus and (1B) cerebellum samples from sham operation, ischemia and ischemia with PZH treatment groups of WKY and SHR two weeks after the ligation operation. For hippocampus (1A), in both WKY and SHR, ischemia significantly increased the cell death as compared to the sham operation groups (* P < 0.05). PZH protected hippocampus from the damage induced by ischemia and showed significant decreases (**P < 0.05) as compared to the ischemia groups. For cerebeullum (1B) there was no significant difference between the cell death result of the WKY and SHR groups.