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Objective To investigate the effects of hypotonic sodium chloride hetastarh 40 injection(HSCH)on the expression of PMN Fas following hemorrhagic shock,and to explore the effective role and mechanisms of HSCH on hemorrhagic shock.Methods Modified Wiggers canine hemorrhagic shock model was used.Expression of Fas in PMN was measured by flow cytometry.Results The levels of PMN Fas expression during hemorrhagic shock were significantly lower than those in control group(P
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Objective To explore oligodendrocyte selective vulnerability in gray matter area and the effect of subhypothermia after transient forebrain ischemia in gerbils.Methods The gerbils model of forebrain ischemia was induced by 15 min bilateral carotid occlusion.All gerbils were divided randomly into sham operation group,ischemic reperfusion group and subhypothermia treatment group (32.5?0.5℃).Immunohistochemistry for cell specific antigens (transferrin,TF) was used to identify oligodendrocyte.Results The density of TF positive oligodendrocyte in the cortex at 1～2 days reperfusion following ischemia decreased remarkably (P
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Objective To explore the relationship between reactive astrogliosis and delayed neuronal ischemic tolerance by preconditioning ischemia in gerbil hippocampal CA 1 region.Methods All gerbils were divided randomly into sham operation group,cerebral ischemia group and preconditioning ischemia group and preconditioning ischemia plus subsequent ischemia group. Transient forebrain ischemia model was induced by bilateral carotid occlution in gerbils. Immunohistochemistry for cell specific markers (glial fibrillary acidic protein(GFAP)was used to identify astrocyte.Results The numbers of GFAP positive astrocyte in hippocampal CA 1 region increased slightly at 1~7days following preconditioning ischemia, but increased significantly at 28 days after preconditioning ischemia ( P