JOURNAL ARTICLE

The protection of alanyl-glutamine dipeptide from ischemia reperfusion injury of liver in the rats

Abstract

目的 探讨丙氨酰-谷氨酰胺二肽(Ala-Gln)对肝脏缺血再灌注损伤(HIRI)的保护作用.方法采用大鼠HIRI模型(Pringle's法阻断入肝血流30 min),分谷氨酰胺组(G组)及对照组(C组),检测再灌注后血清肝生化酶、肝组织还原型谷胱甘肽(GSH)及超氧化物歧化酶(SOD)水平,对肝组织进行光镜与电镜检查,并计算术后24 h生存率.结果再灌注1h,G组血清ALT(499.25±120.84)U/L、LDH(6 956.00±2 443.93)U/L的水平均显著低于C组(ALT:823.56±328.71,P<0.05;LDH:11 715.31±2 993.50,P<0.01);再灌注24 h,两组血清ALT、LDH的水平均有显著恢复,但G组(ALT:176.69±151.84;LDH:415.38±213.68)水平仍显著低于C组(ALT:548.25±257.25;LDH:1 958.50±687.32;P<0.01).再灌注1 h及24 h,G组GSH的水平分别为(1 216.09±152.78)μg·g-1·p、(899.73±57.75)μg·g-1·p,均明显高于C组(分别为856.68±117.64,P<0.01;800.50±94.79,P<0.05);两组SOD的活性无统计学差异.G组肝脏组织学与细胞学损害均明显轻于C组.G组术后24h生存率为78.57%(11/14),明显高于C组的45.45%(10/22)(P<0.05).结论 Ala-Gln(Gln)对HIRI具有保护作用,而这种保护作用部分是通过维持肝脏组织中GSH的含量来介导的。

Keywords:
Reperfusion injury Ischemia Glutamine Dipeptide Pharmacology Chemistry Medicine Biochemistry Cardiology Amino acid

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Topics

Organ Transplantation Techniques and Outcomes
Health Sciences →  Medicine →  Surgery
Liver Disease and Transplantation
Health Sciences →  Medicine →  Hepatology
Clinical Nutrition and Gastroenterology
Health Sciences →  Nursing →  Nutrition and Dietetics

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