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Exendin-4对糖尿病大鼠糖脂代谢的影响

李维辛,严祥,王琼,高承霞   

  1. 兰州大学第一医院
  • 收稿日期:2011-01-12 修回日期:2011-04-26 出版日期:2011-10-15 发布日期:2011-10-15
  • 通讯作者: 李维辛

The Effects of Exendin-4 on Glucose and Lipid Metabolism in Diabetic Rats

  • Received:2011-01-12 Revised:2011-04-26 Published:2011-10-15 Online:2011-10-15

摘要: 目的:观察Exendin-4对2型糖尿病(T2DM)大鼠糖脂代谢及胃排空的影响。方法:高脂高糖饲料加小剂量链脲佐菌素制备T2DM大鼠,随机分为正常对照组(NC组),正常干预组(NE组),糖尿病对照组(DC组),糖尿病干预组(DE组);Exendin-4(2ug/kg 每日两次)干预50天。核素法测定各组大鼠胃半排时间、排空速率,留取血清测定空腹血糖(FBG)、糖化血清蛋白(GSP)、游离脂肪酸(FFA)、总胆固醇(TC)和三酰甘油(TG)的含量。 结果:DC组较NC组FBG、FFA 、TC、GSP和TG水平升高,胃半排时间缩短、排空速率加快,差异有统计学意义(P < 0.05)。DE组较DC组FBG、GSP和FFA浓度降低,胃半排时间加长、而排空速率减慢,差异有统计学意义(P < 0.05)。多因素逐步回归分析显示与胃半排时间相关的是FBG。结论:T2DM大鼠在成模后50 d血糖血脂增加,胃排空加速;而Exendin-4可以改善同期糖尿病大鼠的血糖、FFA及胃排空异常。 关键词 Exendin-4 糖尿病, 2型 糖尿病并发症 脂肪酸类, 非酯化 血糖 胃排空 模型, 动物

关键词: Exendin-4, 糖尿病, 游离脂肪酸, 血糖, 胃排空

Abstract: Objective: To investigate the effects of Exendin-4 on glucose and lipid metabolism and gastric emptying in type 2 diabetic(T2DM) rats. Methods: Rat model of T2DM was established by high fat-sugar diet fed and low-dose streptozotocin-treated. SD rats were divided randomly into normal control group(NC), normal+ Exendin-4 group(NE), diabetes control group(DC) and diabetes+exendin-4 group. NE and DE rats were given Exendin-4(2ug/kg) twice daily for 50 days. Half time of gastric emptying and emptying rate were evaluated by SPECT. The serum level of fasting blood glucose (FBG), glycosylated serum protein (GSP), free fatty acids (FFA), total cholesterol (TC), triglyceride(TG) tissue were measured by kit. Results: Compared with NC group, DC rats has higher FBG, FFA, TC, GSP, TG and emptying rate(P<0.05), but half time of gastric emptying decreased significantly(P<0.05). Compared with DC group, FBG, GSP, FFA and emptying rate of DE rats were reduced(P<0.05), but has more half time of gastric emptying(P<0.05). The results of Multivariate stepwise regression analysis showed that FBG related to half time of gastric emptying. Conclusion: Type 2 diabetic rats has faster gastric motility, higher blood glucose and lipid. Exendin-4 might improve the disorders of blood glucose, free fatty acids and gastric emptying in diabetic rats. Key words Exendin-4; diabetes mellitus, type 2; diabetes complications; fatty acids, nonesterified; blood glucose; gastric emptying; models, animal

Key words: Exendin-4, diabetes mellitus, free fatty acids, blood glucose, gastric emptying