幼鼠肠缺血再灌注损伤时TNF-α的产生及作用

被引:12
作者
李春艳
肖福大
于明
机构
[1] 中国医科大学实验设备处实验技术中心
[2] 第二临床学院小儿先天畸形卫生部重点实验室
关键词
肠; 缺血/再灌注; 肿瘤坏死因子;
D O I
暂无
中图分类号
R364.1 [循环障碍];
学科分类号
摘要
目的 :探讨肠缺血 /再灌注时肿瘤坏死因子 α(tumornecrosisfactor α ,TNF α)的来源及作用。方法 :建立幼鼠肠缺血 /再灌注动物模型 ,利用放射免疫法检测门静脉和外周血血清中TNF α表达及对肠组织进行形态学观察。结果 :缺血 30min组肠粘膜轻度受损 ,缺血 30min /再灌注 30min组、缺血 30min/再灌注 6 0min组、缺血 30min/再灌注 90min组肠粘膜中度受损 ,缺血 12 0min组肠粘膜重度受损。肠缺血 30min组门静脉血清TNF α开始升高为 (2 .0 6± 0 .5 2 )ng/ml,缺血 30min/再灌注 30min组达峰值为 (2 .96± 0 .4 5 )ng/ml,二者皆明显高于对照组 (P <0 .0 5 ) ;缺血 30min/再灌注 6 0min组、缺血 30min/再灌注 90min组时下降 ;肠缺血 30min/再灌注 30min组外周血清TNF α也升高为 (2 .11± 0 .2 9)ng/ml(P <0 .0 5 )。且缺血 30min组、缺血 30min/再灌注 30min组、缺血 12 0min组门静脉TNF α水平显著高于外周血 (P <0 .0 5 )。结论 :幼鼠肠缺血 /再灌注后TNF α在肠、肝内均有产生 ,但门静脉血清TNF α较外周血血清升高明显 ,因此推论幼鼠肠缺血 /再灌注损伤TNF α可能主要来源于肠组织 ,并且介导幼鼠肠缺血 /再灌注损伤的病理过程
引用
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页码:3 / 5
页数:3
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