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Impaired flow-dependent control of vascular tone and remodeling in P2X4-deficient mice.

Abstract：

:The structure and function of blood vessels adapt to environmental changes such as physical development and exercise. This phenomenon is based on the ability of the endothelial cells to sense and respond to blood flow; however, the underlying mechanisms remain unclear. Here we show that the ATP-gated P2X4 ion channel, expressed on endothelial cells and encoded by P2rx4 in mice, has a key role in the response of endothelial cells to changes in blood flow. P2rx4(-/-) mice do not have normal endothelial cell responses to flow, such as influx of Ca(2+) and subsequent production of the potent vasodilator nitric oxide (NO). Additionally, vessel dilation induced by acute increases in blood flow is markedly suppressed in P2rx4(-/-) mice. Furthermore, P2rx4(-/-) mice have higher blood pressure and excrete smaller amounts of NO products in their urine than do wild-type mice. Moreover, no adaptive vascular remodeling, that is, a decrease in vessel size in response to a chronic decrease in blood flow, was observed in P2rx4(-/-) mice. Thus, endothelial P2X4 channels are crucial to flow-sensitive mechanisms that regulate blood pressure and vascular remodeling.

journal_name

Nat Med

journal_title

Nature medicine

authors

Yamamoto K,Sokabe T,Matsumoto T,Yoshimura K,Shibata M,Ohura N,Fukuda T,Sato T,Sekine K,Kato S,Isshiki M,Fujita T,Kobayashi M,Kawamura K,Masuda H,Kamiya A,Ando J

doi

10.1038/nm1338

keywords:

subject

Has Abstract

pub_date

2006-01-01 00:00:00

pages

133-7

issue

1

eissn

1078-8956

issn

1546-170X

pii

nm1338

journal_volume

12

pub_type

杂志文章

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