食品科学 ›› 2011, Vol. 32 ›› Issue (19): 198-200.doi: 10.7506/spkx1002-6630-201119043

• 营养卫生 • 上一篇    下一篇

苏氨酸锌对糖尿病大鼠肝脏损伤的保护作用

李 川,朱科学,聂少平,胡晓波,黄丹菲,谢明勇*   

  1. 南昌大学 食品科学与技术国家重点实验室
  • 发布日期:2011-10-12
  • 基金资助:
    国家自然科学基金项目(31071532)

Protective Effect of Zinc Threonine against Liver Injury in Diabetic Rats

LI Chuan,ZHU Ke-xue,NIE Shao-ping,HU Xiao-bo,HUANG Dan-fei,XIE Ming-yong*   

  1. (State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China)
  • Published:2011-10-12

摘要: 目的:观察苏氨酸锌对链脲佐菌素(STZ)诱导的糖尿病大鼠肝脏的抗氧化性、肝功能等相关指标的影响,并探讨其可能的作用机制。方法:采用尾静脉注射链脲佐菌素法复制糖尿病大鼠模型。将造模成功的大鼠随机分为糖尿病对照组,二甲基双胍阳性对照组,苏氨酸锌低、中、高剂量组,另设同龄大鼠为正常对照组。检测并比较各组肝脏匀浆谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)、一氧化氮合酶(NOS)、丙二醛(MDA)、一氧化氮(NO)、肝脏指数以及血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、血清总蛋白(TP)等指标。结果:高剂量的苏氨酸锌对糖尿病大鼠的MDA、NO、SOD、GSH-Px、肝脏指数等指标有显著性改善作用(P<0.05),并对ALT、AST、 AST/ALT、TP有一定的改善作用。结论:苏氨酸锌对糖尿病大鼠肝脏氧化损伤、肝功能有一定的保护作用。

关键词: 苏氨酸锌, 糖尿病, 大鼠, 氧化应激, 肝功能

Abstract: Objective: To observe the effect of zinc threonine on antioxidant activity and function of liver in streptozotocin (STZ)-induced diabetic rats and probe the underlying mechanisms. Methods: Wistar rats were subjected to caudal vein injection of STZ to induce a diabetic model. The model rats were randomly divided into diabetic control group, metformin positive control group, and low-, middle- and high-dosage zinc threonine groups, and normal group. The activities of glutathione peroxidase (GSH-Px), superoxide dismutase (SOD), and nitric oxide synthase (NOS) and the content of malondialdehyde (MDA) and nitric oxide (NO) in the liver homogenates of each group were determined after 8 weeks of administration carried out once a day. Meanwhile, the activities of serum ALT and AST and the content of TP were assayed. Results: Compared with the diabetic control group, MDA, NO, SOD, GSH-Px and liver index in the high-dosage zinc threonine group were obviously improved (P <0.05), and the effect of zinc threonine on ALT, AST, AST/ALT and TP were in a dose-dependent manner. Conclusion: Zinc threonine can protect the liver from oxidative damage and improve the liver function of diabetic rats.

Key words: zinc threonine, diabetes mellitus, rat, oxidative stress, liver function

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