中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (12): 1909-1914.doi: 10.3969/j.issn.2095-4344.2017.12.018

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

二甲双胍对2型糖尿病模型大鼠胰岛素抵抗的影响

秦  凤1,李春亮2,张惠莉1   

  1. 1青海大学附属医院内分泌科,青海省西宁市  810001;2青海大学医学院,青海省西宁市  810016
  • 收稿日期:2017-02-22 出版日期:2017-04-28 发布日期:2017-05-16
  • 通讯作者: 张惠莉,教授,主任医师,青海大学附属医院内分泌科,青海省西宁市 810001
  • 作者简介:秦凤,女,1981年生,四川省遂宁市人,汉族,主治医师,主要从事内分泌疾病和代谢病的研究。

Effect of metformin on the insulin resistance in a rat model of type 2 diabetes mellitus

Qin Feng1, Li Chun-liang2, Zhang Hui-li1   

  1. 1Department of Endocrinology, Affiliated Hospital of Qinghai University, Xining 810001, Qinghai Province, China; 2Medical College of Qinghai University, Xining 810016, Qinghai Province, China
  • Received:2017-02-22 Online:2017-04-28 Published:2017-05-16
  • Contact: Zhang Hui-li, Professor, Chief physician, Department of Endocrinology, Affiliated Hospital of Qinghai University, Xining 810001, Qinghai Province, China
  • About author:Qin Feng, Attending physician, Department of Endocrinology, Affiliated Hospital of Qinghai University, Xining 810001, Qinghai Province, China

摘要:

文章快速阅读:

文题释义:
胰岛素抵抗:是指各种原因使胰岛素促进葡萄糖摄取和利用的效率下降,机体代偿性的分泌过多胰岛素产生高胰岛素血症,以维持血糖的稳定。胰岛素抵抗易导致代谢综合征和2型糖尿病。
胰岛素受体:是一个四聚体,由两个α亚基和两个β亚基通过二硫键连接。两个α亚基位于细胞质膜的外侧,其上有胰岛素的结合位点;两个β亚基是跨膜蛋白,起信号转导作用。
摘要
背景:
目前已经发现的脂肪代谢相关基因有10余种,脂肪代谢相关基因介导的内分泌功能失常是导致胰岛素抵抗发生、发展的重要病理基础。
目的:分析二甲双胍对2型糖尿病大鼠血脂水平、胰岛素抵抗相关基因及肝脏和胰腺组织病理学变化的影响。
方法:通过4周高脂饮食结合腹腔注射链脲佐菌素(35 mg/kg)建立2型糖尿病大鼠模型。4周高脂饮食时,模型大鼠同时口服二甲双胍4周[400 mg/(kg•d)],对照组大鼠正常饮食,腹腔未注射链脲佐菌素。然后利用半定量RT-PCR、组织病理学及生化检测等方法进行相关分析。
结果与结论:①二甲双胍通过恢复2型糖尿病大鼠正常血脂,改善胰岛素抵抗症状;②二甲双胍上调脂肪代谢相关胰岛素受体和基因乙酰辅酶A氧化酶, 肉毒碱棕榈酰转移1和过氧化物酶体增殖物激活受体α;③二甲双胍治疗下调胎球蛋白A和视黄醇结合蛋白,2型糖尿病大鼠中降低的脂滴包被蛋白也恢复正常;④在胰腺内,二甲双胍处理诱导胰岛素分泌和胰腺β细胞再生;⑤结果说明,二甲双胍通过调节胎球蛋白A、视黄醇结合蛋白4、脂滴包被蛋白和脂肪代谢相关基因,改善2型糖尿病引起的胰岛素抵抗。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程
ORCID: 0000-0003-2043-9136(秦凤)

关键词: 组织构建, 组织工程, 二甲双胍, 2型糖尿病, 胰岛素抵抗, 机制

Abstract:

BACKGROUND: More than 10 kinds of lipid metabolism-related genes have been found, and endocrine dysfunction mediated by these genes is an important pathological basis for the occurrence and development of insulin resistance.
OBJECTIVE: To investigate the effects of metformin on serum lipid profiles and the expression levels of various 
genes associated with insulin resistance, as well as the histopathological changes of the liver and pancreas in rats with type 2 diabetes melitus.
METHODS: A type 2 diabetes mellitus rat model was established by feeding a high-fat diet to the rats for 4 weeks, combined with the intraperitoneal injection of streptozotocin (35 mg/kg). In the meanwhile, metformin was administered orally (400 mg/kg•d) (model group) or nothing (control group). Semi-quantitative RT-PCR, histopathological and biochemical examinations were then performed.
RESULTS AND CONCLUSION: Metformin improved the symptoms of insulin resistance by normalizing the serum lipid profiles in the diabetic rats. Furthermore, metformin upregulated the expression levels of insulin receptors and genes associated with lipid metabolism, including acyl-CoA oxidase, carnitine palmitoyl transferase-1 and peroxisome proliferator activated receptor-α. In addition, metformin downregulated the expression levels of fetuin-A and retinol binding protein-4, and improved the expression of perilipin that had been reduced in the type 2 diabetes mellitus rats. Metformin was shown to induce positive signaling for insulin and the regeneration of pancreatic β cells in the pancreas. These results suggest that metformin ameliorates the insulin resistance induced by type 2 diabetes mellitus via regulating the expression levels of fetuin-A, retinol binding protein-4, perilipin and various genes associated with lipid metabolism.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Diabetes Mellitus, Type 2, Metformin, Insulin, Tissue Engineering

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