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中华普通外科学文献(电子版) ›› 2008, Vol. 02 ›› Issue (01) : 13 -16. doi: 10.3877/cma.j.issn.1674-0793.2008.01.006

论著

大鼠肝脏缺血再灌注时肝细胞凋亡与肿瘤坏死因子-α的关系
孙凯1, 刘志苏2,(), 孙权2   
  1. 1.510000 广州,南方医科大学南方医院普通外科
    2.430071 武汉,武汉大学中南医院普通外科
  • 收稿日期:2007-10-24 出版日期:2008-02-01
  • 通信作者: 刘志苏

Relationship between hepatocellular apoptosis and tumor necrosis factor-alpha in rats during hepatic ischemia-reperfusion.

Kai SUN1, Zhi-su LIU,1()   

  1. 1.Department of General Surgery, Nanfang Hospital of Southern University,Guangzhou 510000,China
  • Received:2007-10-24 Published:2008-02-01
  • Corresponding author: Zhi-su LIU
引用本文:

孙凯, 刘志苏, 孙权. 大鼠肝脏缺血再灌注时肝细胞凋亡与肿瘤坏死因子-α的关系[J/OL]. 中华普通外科学文献(电子版), 2008, 02(01): 13-16.

Kai SUN, Zhi-su LIU. Relationship between hepatocellular apoptosis and tumor necrosis factor-alpha in rats during hepatic ischemia-reperfusion.[J/OL]. Chinese Archives of General Surgery(Electronic Edition), 2008, 02(01): 13-16.

目的

探讨大鼠肝脏缺血再灌注时肝细胞凋亡与肿瘤坏死因子-α(TNF-α)的关系。

方法

建立大鼠局部肝脏缺血再灌注模型,将72只健康雄性Wistar大鼠随机分为正常组、假手术组和缺血再灌注组,采用放射免疫法测定再灌注后不同时相中血清TNF-α含量,末端脱氧核苷酸转移酶介导的dUTP缺口末端标记法(TUNEL)和透射电镜观察肝细胞凋亡状态。

结果

再灌注后1、3、6 h和24 h血清TNF-α含量及肝细胞凋亡指数(HAI)明显高于正常组和假手术组,且均于6 h达到高峰,再灌注后各时相TNF-α水平与HAI呈显著正相关。

结论

肝脏缺血再灌注损伤过程中,TNF-α表达水平异常上调并可能对肝实质细胞凋亡起介导作用。

Objective

To investigate the relationship between hepatocellular apoptosis and tumor necrosis factor-alpha(TNF-α)in rats during hepatic ischemia-reperfusion.

Methods

With a rat model of acute hepatic ischemia-reperfusion,72 healthy male Wistar rats were randomly divided into 3 groups:normal group, sham-operated group and ischemia-reperfusion group. The concentrations of serum TNF-α was measured by radioimmunity technique and the hepatocellular apoptosis was detected by TdT-mediated dUTP-biotin nick end labeling(TUNEL) and electron microscope.

Results

The concentrations of serum TNF-α and hepatocellular apoptotic index(HAI)in ischemia-reperfusion group were higher than that in normal and sham-operated groups.Both TNF-α and HAI reached peak at 6 hour after reperfusion. There was a positive correlation between TNF-α and HAI.

Conclusion

There is an extraordinary up-regulation of the expression of TNF-α after hepatic ischemia-reperfusion and perhaps TNF-α is an inducible factor of hepatocellular apoptosis.

图1 肝组织TUNEL 染色(×200) 注:A 为假手术组,B 为IR 组;再灌注后,TUNEL 染色阳性的凋亡细胞(胞核棕黄着色,主要位于中央静脉周围)显著增多。
表1 肝脏缺血再灌注后不同时相血清TNF-α含量变化(μg/L,±s,n=8)
表2 肝脏缺血再灌注后不同时相HAI变化(%,±s,n=8)
图2 肝细胞凋亡的超微结构改变(×15 000) 注:胞核内可见染色质浓集、边聚
1
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