急性实验性脑缺血早期脑组织抗氧化酶的研究

被引:2
作者
白云 [1 ]
单书宝 [1 ]
江德华 [1 ]
机构
[1] 天津市神经病学研究所神经生化室
关键词
脑缺血; 抗氧剂;
D O I
暂无
中图分类号
R285.5 [中药实验药理];
学科分类号
1008 ;
摘要
结扎大鼠右侧大脑中动脉,分别测定其缺血脑组织的超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)、过氧化氢酶(CAT)的活性。与假手术组比较,缺血中心区(纹体、颞区皮层),SOD及GSH-Px活性显著降低,缺血边缘区(后顶枕区皮层)GSH-Px也显著降低。结果表明,纹体GSH-Px显著高于皮层。实验数据提示,缺血条件下脑组织的超氧化物O2-和过氧化氢H2O2蓄积,引发膜的多不饱和脂肪酸过氧化,造成神经细胞的损坏;由于多巴胺氧化脱胺过程中O2-及H2O2过量产生,而同时缺血脑组织SOD、GSH-Px活性降低,故氧自由基可能是多巴胺导致神经元损伤的原因之一。
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