当前位置： SCI文献检索 > JOURNAL OF VASCULAR SURGERY期刊下所有文献 > Metformin stimulates ischemia-induced revascularization through an eNOS dependent pathway in the ischemic hindlimb mice model.

Metformin stimulates ischemia-induced revascularization through an eNOS dependent pathway in the ischemic hindlimb mice model.

Abstract：

OBJECTIVE:As first-line treatment for type 2 diabetes, metformin has gained a strong position. In addition, type 2 diabetics benefit from the fact that metformin is associated with a reduction in cardiovascular events. Nevertheless, there is a dearth of information concerning the functional role of metformin in regulating angiogenesis. Our present study explores whether metformin is involved in the modulation of the revascularization processes in vivo by employing a hindlimb mice model of ischemia-induced angiogenesis. METHODS:For comparative purposes, randomly selected wild-type (WT) mice or endothelial nitric oxide synthase (eNOS) deficient mice were assigned to one of two groups. One group was orally administered a daily dose of metformin through a gastric tube whereas the other group served as a control with no metformin administered. Both groups were subjected to unilateral hindlimb ischemia. Laser Doppler analysis coupled with capillary density staining with CD31was the method employed to determine revascularization. Adenosine monophosphate-activated protein kinase (AMPK) and eNOS phosphorylation levels were assessed using Western blot analysis. RESULTS:Subsequent to hindlimb ischemic surgery, in comparison to the nontreated mice, metformin-treated WT mice showed accelerated limb perfusion, which was substantiated by laser Doppler blood-flow measurements and the presence of increased capillary density in the ischemic adductor muscle. Treatment with metformin significantly enhanced the increase in AMPK and eNOS phosphorylation levels of muscle tissues in WT mice induced by ischemia. In eNOS- deficient knockout mice, there was a significant increase in ischemic tissue AMPK phosphorylation induced by metformin; however, blood flow recovery in ischemic limb after surgery was unaffected. CONCLUSIONS:Metformin promoted revascularization in the presence of tissue ischemia through an AMPK/eNOS-related mechanism. Our study indicates that, in addition to its glucose-lowering effect, metformin fosters improved revascularization, which is responsible for its positive effect on patients with critical limb ischemia.

journal_name

J Vasc Surg

journal_title

Journal of vascular surgery

authors

Takahashi N,Shibata R,Ouchi N,Sugimoto M,Murohara T,Komori K

doi

10.1016/j.jvs.2013.09.061

subject

Has Abstract

pub_date

2015-02-01 00:00:00

pages

489-96

issue

eissn

0741-5214

issn

1097-6809

pii

S0741-5214(13)01889-2

journal_volume

pub_type

杂志文章

在线工具

Metformin stimulates ischemia-induced revascularization through an eNOS dependent pathway in the ischemic hindlimb mice model.