Exenatide Protects Against Glucose- and Lipid-Induced Endothelial Dysfunction: Evidence for Direct Vasodilation Effect of GLP-1 Receptor Agonists in Humans.
Exenatide Protects Against Glucose- and Lipid-Induced Endothelial Dysfunction: Evidence for Direct Vasodilation Effect of GLP-1 Receptor Agonists in Humans.
复制标题
作者：
Koska J;Sands M;Burciu C;D'Souza KM;Raravikar K;Liu J;Truran S;Franco DA;Schwartz EA;Schwenke DC;D'Alessio D;Migrino RQ;Reaven PD
GLP-1 receptor (GLP-1R) agonists may improve endothelial function (EF) via metabolic improvement and direct vascular action. The current study determined the effect of GLP-1R agonist exenatide on postprandial EF in type 2 diabetes and the mechanisms underlying GLP-1R agonist–mediated vasodilation. Two crossover studies were conducted: 36 participants with type 2 diabetes received subcutaneous exenatide or placebo for 11 days and EF, and glucose and lipid responses to breakfast and lunch were determined; and 32 participants with impaired glucose tolerance (IGT) or diet-controlled type 2 diabetes had EF measured before and after intravenous exenatide, with or without the GLP-1R antagonist exendin-9. Mechanisms of GLP-1R agonist action were studied ex vivo on human subcutaneous adipose tissue arterioles and endothelial cells. Subcutaneous exenatide increased postprandial EF independent of reductions in plasma glucose and triglycerides. Intravenous exenatide increased fasting EF, and exendin-9 abolished this effect. Exenatide elicited eNOS activation and NO production in endothelial cells, and induced dose-dependent vasorelaxation and reduced high-glucose or lipid-induced endothelial dysfunction in arterioles ex vivo. These effects were reduced with AMPK inhibition. In conclusion, exenatide augmented postprandial EF in subjects with diabetes and prevented high-glucose and lipid-induced endothelial dysfunction in human arterioles. These effects were largely direct, via GLP-1R and AMPK activation.
登录
查看更多内容
DOI：
10.1161/atvbaha.110.222653
发表时间：
2012-02-01
影响因子：
8.7
作者：
Ha, Sang Jin;Kim, Weon;Kim, Kwon Sam
通讯作者：
Kim, Kwon Sam
影响因子：
16.2
作者：
Fineman, MS;Bicsak, TA;Baron, AD
通讯作者：
Baron, AD
影响因子：
3.9
作者：
Green, Brian D.;Hand, Katharine V.;Grieve, David J.
通讯作者：
Grieve, David J.
影响因子：
37.8
作者：
Halcox, JPJ;Schenke, WH;Quyyumi, AA
通讯作者：
Quyyumi, AA
影响因子：
5.8
作者：
Deane, Adam M.;Nguyen, Nam Q.;Horowitz, Michael
通讯作者：
Horowitz, Michael