食品科学 ›› 2011, Vol. 32 ›› Issue (1 ): 221-224.doi: 10.7506/spkx1002-6630-201101053

• 营养卫生 • 上一篇    下一篇

白藜芦醇对KKAy 小鼠的胰岛素敏感性影响及机制

孙延双1,陈思凡1,朱 伟2,郑 琳1,张子丽1,凌文华1,冯 翔1 ,*   

  1. 1. 广东省营养膳食与健康重点实验室,中山大学公共卫生学院 2. 广州市疾病预防控制中心
  • 收稿日期:2010-06-09 出版日期:2011-01-15 发布日期:2010-12-28
  • 通讯作者: 冯翔 E-mail:fengx@mail.sysu.edu.cn
  • 基金资助:

    广东省医学科研基金资助项目(2008YK0653)

Effect and Mechanism of Resveratrol on Insulin Sensitivity in Insulin-resistant KKAy Mice

SUN Yan-shuang1,CHEN Si-fan1,ZHU Wei2,ZHENG Lin1,ZHANG Zi-li1,LING Wen-hua1,FENG Xiang1,*   

  1. 1. Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, SUN YAT-SEN University,
    Guangzhou 510080, China;2. Guangzhou Center for Disease Control and Prevention, Guangzhou 510080, China
  • Received:2010-06-09 Online:2011-01-15 Published:2010-12-28
  • Contact: FENG Xiang E-mail:fengx@mail.sysu.edu.cn

摘要:

目的:观察白藜芦醇对胰岛素抵抗小鼠(KKAy)胰岛素敏感性的影响,并探讨其机制。方法:将36 只8周龄KKAy 小鼠分成3 组,其中两组KKAy 小鼠分别饲喂添加白藜芦醇的AIN93G 饲料(2g/kg 饲料 或4g/kg 饲料),另一组KKAy 小鼠为模型组,另外以12 只同周龄C57BL/6J 小鼠为对照。观察白藜芦醇对小鼠血糖、血清胰岛素 水平、葡萄糖耐量、胰岛素耐量等的影响;Western blot 实验检测不同组小鼠肝脏中沉默信息调节因子1(silent information regulator 1,sirt-1)蛋白表达及胰岛素受体底物1(insulin receptor substrate 1,IRS-1)的磷酸化水平。结 果:白藜芦醇干预可以增强KKAy 小鼠胰岛素敏感性,改善胰岛素耐量和葡萄糖耐量;肝脏中sirt-1 的表达和IRS-1 的磷酸化水平均升高。结论:白藜芦醇可以改善小鼠胰岛素抵抗及糖耐量异常,这可能与白藜芦醇提高肝脏中sirt-1 的表达,从而激活胰岛素信号通路相关蛋白有关。

关键词: 白藜芦醇, 胰岛素抵抗, 沉默信息调节因子1, 胰岛素受体底物1

Abstract:

Objective: To investigate the effect of resveratrol on insulin sensitivity in insulin-resistant KKAy mice and to probe the mechanism. Methods: A total of 36 7-week-old KKAy mice were randomly divided into 3 groups, which were fed standard AIN93G diet or standard AIN93G diet with resveratrol at contents of 2 g/kg and 4 g/kg diet. Totally 12 C57BL/6J mice were used as the control. The 12 h fasting levels of blood glucose and serum insulin and glucose and insulin tolerance at 0, 6 weeks and 12 weeks of drug intervention were determined to evaluate the effect of resveratrol. The expression of silent information regulator(sirt-1) and phosphorylation of insulin receptor substrate 1 (IRS-1) in liver were examined by western blotting. Results: Resveratrol significantly improved insulin sensitivity of KKAy mice, ameliorated glucose tolerance and insulin tolerance, and enhanced the expression level of sirt-1 and phosphorylation of IRS-1 in liver. Conclusion: Resveratol may ameliorate insulin resistance and glucose tolerance disorder of mice due to its promotion effect on the expression of sirt-1 in liver and activation effect on the proteins related to insulin signaling.

Key words: resveratrol, insulin resistance, silent information regulator-1, insulin receptor substrate-1

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