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Published in: Translational Stroke Research 3/2019

01-06-2019 | Original Article

Contribution of Apelin-17 to Collateral Circulation Following Cerebral Ischemic Stroke

Authors: Wan Jiang, Wei Hu, Li Ye, Yanghua Tian, Ren Zhao, Juan Du, Bing Shen, Kai Wang

Published in: Translational Stroke Research | Issue 3/2019

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Abstract

Apelin, an essential mediator of homeostasis, is crucially involved in cardiovascular diseases, including ischemic stroke. However, the functional roles of apelin-17 in cerebral collateral circulation and ischemic stroke protection are unknown. Here, we investigated the association between plasma apelin-17 levels and collateral circulation in patients with ischemic stroke and examined the mechanism undergirding the effects of apelin-17 on cerebral artery contraction and ischemic stroke protection in an animal model. Plasma nitric oxide (NO), apelin-17, and apelin-36 levels were assessed by enzyme-linked immunosorbent assays in ischemic stroke patients with good or poor collateral circulation and in healthy participants. Additionally, the effects of apelin-17 on rat basilar artery contractions (in vitro) and cerebral ischemia (in vivo) were determined using vessel tension measurements and nuclear magnetic resonance, respectively. Patients with good collateral circulation had significantly higher plasma apelin-17 and apelin-36 levels than both patients with poor collateral circulation and healthy participants and plasma NO levels significantly higher than those in healthy participants. In vitro, apelin-17 pretreatment markedly attenuated U46619-induced rat basilar artery contractions in an endothelium-dependent manner. Additionally, NO production or guanylyl cyclase inhibitors abolished the apelin-17 effect on U46619-induced vascular contraction. Intravenous pretreatment of rats with apelin-17 markedly reduced cerebral infarct volume at 24 h after middle cerebral artery occlusion. Plasma apelin-17 levels in ischemic stroke patients were positively associated with enhanced collateral circulation, which our animal study data suggested may have resulted from an apelin-17-induced cerebral artery dilation mediated through the NO–cGMP pathway.
Literature
8.
Metadata
Title
Contribution of Apelin-17 to Collateral Circulation Following Cerebral Ischemic Stroke
Authors
Wan Jiang
Wei Hu
Li Ye
Yanghua Tian
Ren Zhao
Juan Du
Bing Shen
Kai Wang
Publication date
01-06-2019
Publisher
Springer US
Published in
Translational Stroke Research / Issue 3/2019
Print ISSN: 1868-4483
Electronic ISSN: 1868-601X
DOI
https://doi.org/10.1007/s12975-018-0638-7

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