急性低压缺氧对大鼠肾组织中生化指标变化的研究

目的：观察急性低压缺氧对大鼠肾组织中超氧化物歧化酶（SOD）、丙二醛（MDA）、还原型谷胱甘肽（ GSH）、过氧化氢酶（ CAT）及内皮素（ ET-1）和肿瘤坏死因子（ TNF-α）的影响。方法将24只雄性Wistar大鼠，体重180～220 g，随机分成地面对照组和急性低压缺氧组，急性低压缺氧组又分成缺氧1组和缺氧2组，每组8只。急性低压缺氧后10 min和24 h处死动物，迅速取出肾脏进行生化指标的检测，并采用免疫组织化学方法观察肾组织内皮素（ ET-1）和肿瘤坏死因子（ TNF-α）的表达情况。结果急性低压缺氧后，大鼠肾组织中SOD活性明显下降（P ＜0.01），缺氧1组CAT活性极显著降低（P ＜0.01），缺氧2组GSH活性显著降低（P ＜0.05），但MDA含量无明显变化（ P ＞0.05）。免疫组织化学染色显示，ET-1和TNF-α表达均明显增强，24 h 后表达减弱。结论SOD、CAT和GSH活性明显下降及ET-1及TNF-α表达明显增强，可能参与了缺氧性肾损伤的病理过程。

The study of acute hypobaric hypoxia on variation biochemical index of renal tissue in rats

Objective To observe the effect of superoxide dismutase （ SOD ） , malondialdehyde （ MDA ） , glutathione （GSH）, catalase （CAT） and endothelin （ET-1） and tumor necrosis factor alpha （TNF-α） on rat renal tissue under acute hypoxia .Methods 24 male Wistar rats, weight 180~220 g, were randomly divided into control group and acute hypobaric hypoxia group .Acute hypoxia group was divided into 2 groups hypoxia 1 and hypoxia 2, 8 rats for each group.After acute hypobaric hypoxia 10min and 24h, rats were sacrificed.The left removed kidneys were analyzed for biochemical indexes , and the right parts were observed by immunohistochemistry to evaluate the expression level of renal endothelin （ET-1） and tumor necrosis factor alpha （TNF-α）.Results After acute hypobaric hypoxia , the activity of SOD of the rats kidney was greatly decreased （P〈0.01）, CAT activity of hypoxia group 1 was significantly decreased （P〈0.01）, GSH activity of hypoxia group 2 was significantly decreased （P〈0.05）, but the MDA content had no obvious change （ P ＆gt;0.05）.The immunohistochemical staining showed that , the expression level of ET-1 and TNF-αwas increased remarkably, but it was reduced after 24 h.Conclusion The obviously decreased activity of SOD , CAT, GSH and significantly increased expression of ET-1 and TNF-α, may be involved in the pathogenesis of renal hypoxic injury .