Notch3 Is a Major Regulator of Vascular Tone in Cerebral and Tail Resistance Arteries

被引：95

作者：

de Chantemele, E. J. Belin ^{[2
]}

Retailleau, K. ^{[2
]}

Pinaud, F. ^{[3
]}

Vessieres, E. ^{[2
]}

Bocquet, A. ^{[2
]}

Guihot, A. L. ^{[2
]}

Lemaire, B. ^{[4
,5
]}

Domenga, V. ^{[4
,5
]}

Baufreton, C. ^{[3
]}

Loufrani, L. ^{[2
]}

Joutel, A. ^{[4
,5
,6
]}

Henrion, D. ^{[1
,2
,3
]}

机构：

[1] INSERM, U771, CNRS, UMR 6214,Fac Med, F-49045 Angers, France

[2] Univ Angers, Angers, France

[3] CHU Angers, Angers, France

[4] INSERM, U740, Paris, France

[5] Univ Paris 07, Fac Med, Paris, France

[6] Groupement Hosp Univ Nord, Grp Hosp LARIBOISIERE FERNAND WIDAL, AP HP, Genet Lab, Paris, France

来源：

ARTERIOSCLEROSIS THROMBOSIS AND VASCULAR BIOLOGY | 2008年 / 28卷 / 12期

关键词：

resistance arteries; myogenic tone; Notch receptors; flow-mediated dilation; local blood flow regulation;

D O I：

10.1161/ATVBAHA.108.171751

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Objective - Notch3, a member of the evolutionary conserved Notch receptor family, is primarily expressed in vascular smooth muscle cells. Genetic studies in human and mice revealed a critical role for Notch3 in the structural integrity of distal resistance arteries by regulating arterial differentiation and postnatal maturation. Methods and Results - We investigated the role of Notch3 in vascular tone in small resistance vessels (tail and cerebral arteries) and large (carotid) arteries isolated from Notch3-deficient mice using arteriography. Passive diameter and compliance were unaltered in mutant arteries. Similarly, contractions to phenylephrine, KC1, angiotensin II, and thromboxane A2 as well as dilation to acetylcholine or sodium nitroprusside were unaffected. However, Notch3 deficiency induced a dramatic reduction in pressure-induced myogenic tone associated with a higher flow (shear stress)-mediated dilation in tail and cerebral resistance arteries only. Furthermore, RhoA activity and myosin light chain phosphorylation, measured in pressurized tail arteries, were significantly reduced in Notch3KO mice. Additionally, myogenic tone inhibition by the Rho kinase inhibitor Y27632 was attenuated in mutant tail arteries. Conclusions - Notch3 plays an important role in the control of vascular mechano-transduction, by modulating the RhoA/Rho kinase pathway, with opposite effects on myogenic tone and flow-mediated dilation in the resistance circulation. (Arterioscler Thromb Vasc Biol. 2008; 28: 2216-2224.)

引用

页码：2216 / U169

页数：24

共 46 条

[21] The ectodomain of the Notch3 receptor accumulates within the cerebrovasculature of CADASIL patients [J].