基础医学与临床 ›› 2014, Vol. 34 ›› Issue (5): 661-666.

• 研究论文 • 上一篇    下一篇

Roux-en-Y胃旁路术对2型糖尿病大鼠肾脏糖异生的影响

文艺1,冯犁2,张少华2,陈振宇2,闫洪涛1,陈涛2,汤礼军2   

  1. 1. 第三军医大学研究生管理大队
    2. 成都军区总医院全军普通外科中心
  • 收稿日期:2013-12-20 修回日期:2014-03-12 出版日期:2014-05-05 发布日期:2014-04-28
  • 通讯作者: 汤礼军 E-mail:whjtlj1251@163.com
  • 基金资助:
    全军临床高新技术重大项目

Effect of Roux-en-Y gastric bypass surgery on renal gluconeogenesis in type 2 diabetes mellitus rats

  • Received:2013-12-20 Revised:2014-03-12 Online:2014-05-05 Published:2014-04-28

摘要: 目的 研究胃旁路术对2型糖尿病大鼠肾脏糖异生的影响,探讨其可能的降糖机制。 方法 建立2 型糖尿病大鼠模型,将大鼠随机分为:对照组,糖尿病模型组,假手术组和手术组。分别于术前及术后4周检测各组大鼠总胆固醇(TC)、三酰甘油(TG)和游离脂肪酸(FAA);术前及术后1、2和4周,检测各组大鼠空腹胰岛素,行口服糖耐量实验(OGTT),计算血糖浓度-时间曲线下面积(AUC)和胰岛素敏感指数(ISI)。术后4周,采用实时荧光定量聚合酶链反应(RT-PCR)和Western 杂交技术检测肾脏组织中糖异生关键酶:葡萄糖6磷酸酶(G-6-P)和磷酸烯醇式丙酮酸激酶(PEPCK)的mRNA表达及蛋白含量。结果 术后4周,手术组大鼠较糖尿病模型和假手术组血脂相关指标降低(P<0.05),空腹血糖及OGTT 2h血糖值明显下降(P<0.05),AUC明显减小(P <0.05),ISI明显升高(P <0.05),手术组G-6-P和PEPCK mRNA的表达及蛋白含量较糖尿病模型组和假手术组均有降低(P<0.05)。结论 胃旁路术能显著降低糖尿病大鼠血糖,改善异常的糖耐量,其降糖机制可能与肾脏糖异生关键酶表达降低,肾脏糖异生减弱有关。

关键词: 胃旁路术, Roux-en-Y, 糖尿病, 肾脏, 糖异生

Abstract: Objective To investigate the effect of Roux-en-Y gastric bypass surgery on renal gluconeogenesis in type 2 diabetes mellitus rats, and explore its possible hypoglycemic mechanism. Method Build diabetes mellitus animal models . Diabetic rats were divided into four groups randomly: control group , diabetes model group (DM group),sham Roux-en-Y gastric bypass group (SRYGB group), Roux-en-Y gastric bypass group (RYGB group). Plasma TG、TC and FFA were measured respectively before and 4th week after the operation in each group rats; the fasting insulin was measured and OGTT was taken before and 1st、2nd and 4th week after the operation, calculate the AUC of blood glucose concentration - time and ISI. The key enzymes of renal gluconeogenesis: G-6-P and PEPCK were detected using RT-PCR and Western blot respectively 4th week after the operation in each group rats. Results 4th week after surgery, RYGB group rats compare with DM and SRYGB group rats, Roux-en-Y gastric bypass surgery can reduce the level of blood lipid (P< 0.05),decrease the blood glucose of fasting and 2h after OGTT significantly (P<0.05), reduce the AUC (P<0.05), increase insulin sensitivity(P<0.05) ,decrease expression of G-6-P and PEPCK mRNA and protein in some degree. Conclusion: Roux-en-Y gastric bypass surgery can reduce blood glucose in diabetic rats significantly,improve the glucose tolerance, its mechanism may be related to decrease of G-6-P and PEPCK mRNA and protein levels in renal tissue,weaken renal gluconeogenesis.

Key words: gastric bypass surgery, Roux-en-Y, diabetes mellitus, kidney, gluconeogenesis

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