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2016 ; 2016
(ä): 3182764
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Amlodipine Ameliorates Ischemia-Induced Neovascularization in Diabetic Rats
through Endothelial Progenitor Cell Mobilization
#MMPMID27243031
Sun J
; Xie J
; Kang L
; Ferro A
; Dong L
; Xu B
Biomed Res Int
2016[]; 2016
(ä): 3182764
PMID27243031
show ga
Objectives. We investigated whether amlodipine could improve angiogenic responses
in a diabetic rat model of acute myocardial infarction (AMI) through improving
bone marrow endothelial progenitor cell (EPC) mobilization, in the same way as
angiotensin converting enzyme inhibitors. Methods. After induction of AMI by
coronary artery ligation, diabetic rats were randomly assigned to receive
perindopril (2?mgkg(-1)?day(-1)), amlodipine (2.5?mgkg(-1)?day(-1)), or vehicle
by gavage (n = 20 per group). Circulating EPC counts before ligation and on days
1, 3, 5, 7, 14, and 28 after AMI were measured in each group. Microvessel
density, cardiac function, and cardiac remodeling were assessed 4 weeks after
treatment. The signaling pathway related to EPC mobilization was also measured.
Results. Circulating EPC count in amlodipine- and perindopril-treated rats peaked
at day 7, to an obvious higher level than the control group peak which was
reached earlier (at day 5). Rats treated with amlodipine showed improved
postischemia neovascularization and cardiac function, together with reduced
cardiac remodeling, decreased interstitial fibrosis, and cardiomyocyte apoptosis.
Amlodipine treatment also increased cardiac SDF-1/CXCR4 expression and gave rise
to activation of VEGF/Akt/eNOS signaling in bone marrow. Conclusions. Amlodipine
promotes neovascularization by improving EPC mobilization from bone marrow in
diabetic rats after AMI, and activation of VEGF/Akt/eNOS signaling may in part
contribute to this.