二甲双胍对高脂饮食诱导的2型糖尿病小鼠胰岛β细胞功能的改善及机制探讨

被引:16
作者
陈致瑜 [1 ,2 ]
刘率男 [2 ]
罗振华 [1 ]
孙素娟 [2 ]
申竹芳 [2 ]
聂瑛洁 [1 ]
机构
[1] 贵州省人民医院中心实验室
[2] 中国医学科学院北京协和医学院药物研究所天然药物活性物质与功能国家重点实验室
关键词
二甲双胍; C57BL/6J小鼠; 胰岛β细胞功能; 内质网应激; 脂质代谢;
D O I
暂无
中图分类号
R965 [实验药理学];
学科分类号
100706 [药理学];
摘要
明确二甲双胍对胰岛β细胞的作用并初步考察其作用机制。高脂饮食诱导的2型糖尿病C57BL/6J小鼠,按照空腹血糖、胰岛素耐量实验中40 min时的血糖下降百分数、甘油三酯、胆固醇及体重5个指标分为模型组(model)与二甲双胍组(model+metformin,200 mg·kg-1),连续灌胃给药58天。采用糖耐量实验与高葡萄糖钳夹技术检测胰岛功能,并分析胰腺中与增殖、脂质代谢及内质网应激相关因子的m RNA及蛋白含量变化。与model组相比,二甲双胍可显著降低C57小鼠体重(P<0.01)、血中甘油三酯与胆固醇水平(P<0.05);减少糖耐量实验中时间-血糖曲线下面积(P<0.05);增加C57小鼠高糖钳夹实验中稳态期葡萄糖输注速率(P<0.05);降低空腹血清胰岛素(P<0.05)。二甲双胍显著上调C57小鼠胰腺中与胰腺增殖相关的胰十二指肠同源框因子-1(Pdx-1,P<0.01)及脂质代谢相关的基因肝X受体β(Lxr-β,P<0.01)的表达。Western blot结果显示,与model组相比,二甲双胍组小鼠胰腺中PDX-1的蛋白表达显著增加(P<0.01);内质网应激相关的PERK通路中的激活转录因子4(ATF4,P<0.001)和C/EBP同源蛋白(CHOP,P<0.05)蛋白表达量也较model组显著减少。以上结果提示,二甲双胍可改善2型糖尿病C57BL/6J小鼠胰岛素分泌功能。其作用机制可能与促进胰腺增殖、改善脂质代谢并缓解胰腺内质网应激状态相关。
引用
收藏
页码:1561 / 1567
页数:7
相关论文
共 9 条
[1]
Disulfide Mispairing During Proinsulin Folding in the Endoplasmic Reticulum [J].
Haataja, Leena ;
Manickam, Nandini ;
Soliman, Ann ;
Tsai, Billy ;
Liu, Ming ;
Arvan, Peter .
DIABETES, 2016, 65 (04) :1050-1060
[2]
Management of Hyperglycemia in Type 2 Diabetes: A Patient-Centered Approach: Position Statement of the American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD).[J].Inzucchi; Silvio E;Bergenstal; Richard M;Buse; John B;Diamant; Michaela;Ferrannini; Ele;Nauck; Michael;Peters; Anne L;Tsapas; Apostolos;Wender; Richard;Matthews; David R.EN.2012, 6
[3]
Management of type 2 diabetes: new and future developments in treatment [J].
Tahrani, Abd A. ;
Bailey, Clifford J. ;
Del Prato, Stefano ;
Barnett, Anthony H. .
LANCET, 2011, 378 (9786) :182-197
[4]
Cardiac fibrosis and vascular remodeling are attenuated by metformin in obese rats.[J].Adriana K. Burlá;Núbia S. Lobato;Zuleica B. Fortes;Wille Oigman;Mario Fritsch Neves.International Journal of Cardiology.2011,
[5]
OCT1 Expression in Adipocytes Could Contribute to Increased Metformin Action in Obese Subjects [J].
Maria Moreno-Navarrete, Jose ;
Ortega, Francisco J. ;
Rodriguez-Hermosa, Jose-Ignacio ;
Sabater, Monica ;
Pardo, Gerard ;
Ricart, Wifredo ;
Manuel Fernandez-Real, Jose .
DIABETES, 2011, 60 (01) :168-176
[6]
The role for endoplasmic reticulum stress in diabetes mellitus [J].
Eizirik, Decio L. ;
Cardozo, Alessandra K. ;
Cnop, Miriam .
ENDOCRINE REVIEWS, 2008, 29 (01) :42-61
[7]
Liver X Receptors as Therapeutic Targets in Metabolism and Atherosclerosis [J].
Nomiyama, Takashi ;
Bruemmer, Dennis .
CURRENT ATHEROSCLEROSIS REPORTS, 2008, 10 (01) :88-95
[8]
SIRT1 deacetylates and positively regulates the nuclear receptor LXR [J].
Li, Xiaoling ;
Zhang, Songwen ;
Blander, Gil ;
Tse, Jeanette G. ;
Krieger, Monty ;
Guarente, Leonard .
MOLECULAR CELL, 2007, 28 (01) :91-106
[9]
Endoplasmic reticulum stress contributes to beta cell apoptosis in type 2 diabetes [J].
Laybutt, D. R. ;
Preston, A. M. ;
Akerfeldt, M. C. ;
Kench, J. G. ;
Busch, A. K. ;
Biankin, A. V. ;
Biden, T. J. .
DIABETOLOGIA, 2007, 50 (04) :752-763