Trx2、GSH和GSH-PX与大鼠肝移植术后肾损伤修复的相关性研究

被引:3
作者
原冬冬
葛缅
孙国亮
张政
池信锦
黑子清
机构
[1] 中山大学附属第三医院麻醉科
关键词
肝移植; 急性肾损伤; 线粒体型硫氧还蛋白; 谷胱甘肽; 谷胱甘肽过氧化物酶;
D O I
暂无
中图分类号
R692.3 [肾炎];
学科分类号
摘要
【目的】探讨线粒体型硫氧还蛋白(Trx2),谷胱甘肽(GSH)和谷胱甘肽过氧化物酶(GSH-PX)对肝移植术后急性肾损伤的保护作用。【方法】建立大鼠肝移植模型,将雄性SD大鼠35只,随机均分为假手术组(n=7)和移植后4 h组(n=7),移植后8 h组(n=7),移植后16 h组(n=7)和移植后24 h组(n=7)。假手术组只进行开腹和血管的分离,各移植组接受自体肝移植。观察大鼠自体肝移植后不同时期肾脏病理、活性氧水平、Trx2表达、乳酸脱氢酶(LDH)、谷胱甘肽(GSH)和谷胱甘肽过氧化物酶(GSH-PX)的活性。【结果】肝移植术后8h肾脏损伤最为严重,移植术后24 h肾脏损伤有所恢复。肝移植术后4 h开始,肾脏·OH、H2O2、MDA和LDH的含量明显增加,逐渐达到最高水平,术后24 h逐渐恢复正常。而具有保护作用的GSH以及GSH-PX的含量在肝移植术后4 h即开始明显下降,术后24 h逐渐恢复至正常水平。肾脏Trx2的表达在肝移植术后4 h反应性的增高,术后8 h达到最高峰,而后逐渐下降。相关性分析显示,肝移植术后肾脏GSH、GSH-PX的含量与肾损伤病理评分呈负相关(P<0.01);肾脏Trx2蛋白表达与肾损伤病理评分呈正相关(P<0.05)。【结论】肝移植术后4 h即可发生明显的肾损伤,术后8 h最为明显,而后逐渐恢复。其损伤的严重程度与GSH和GSH-PX的含量呈负相关;与Trx2的表达呈正相关,Trx2表达的增加有利于抗氧化酶合成,减轻肝移植术后的急性肾损伤。
引用
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页码:666 / 671
页数:6
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