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Research Article Free access | 10.1172/JCI1699

Direct evidence for the importance of endothelium-derived nitric oxide in vascular remodeling.

R D Rudic, E G Shesely, N Maeda, O Smithies, S S Segal, and W C Sessa

Department of Pharmacology, Yale University School of Medicine, Boyer Center for Molecular Medicine, New Haven, Connecticut 06536, USA.

Find articles by Rudic, R. in: PubMed | Google Scholar

Department of Pharmacology, Yale University School of Medicine, Boyer Center for Molecular Medicine, New Haven, Connecticut 06536, USA.

Find articles by Shesely, E. in: PubMed | Google Scholar

Department of Pharmacology, Yale University School of Medicine, Boyer Center for Molecular Medicine, New Haven, Connecticut 06536, USA.

Find articles by Maeda, N. in: PubMed | Google Scholar

Department of Pharmacology, Yale University School of Medicine, Boyer Center for Molecular Medicine, New Haven, Connecticut 06536, USA.

Find articles by Smithies, O. in: PubMed | Google Scholar

Department of Pharmacology, Yale University School of Medicine, Boyer Center for Molecular Medicine, New Haven, Connecticut 06536, USA.

Find articles by Segal, S. in: PubMed | Google Scholar

Department of Pharmacology, Yale University School of Medicine, Boyer Center for Molecular Medicine, New Haven, Connecticut 06536, USA.

Find articles by Sessa, W. in: PubMed | Google Scholar

Published February 15, 1998 - More info

Published in Volume 101, Issue 4 on February 15, 1998
J Clin Invest. 1998;101(4):731–736. https://doi.org/10.1172/JCI1699.
© 1998 The American Society for Clinical Investigation
Published February 15, 1998 - Version history
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Abstract

The vascular endothelium mediates the ability of blood vessels to alter their architecture in response to hemodynamic changes; however, the specific endothelial-derived factors that are responsible for vascular remodeling are poorly understood. Here we show that endothelial-derived nitric oxide (NO) is a major endothelial-derived mediator controlling vascular remodeling. In response to external carotid artery ligation, mice with targeted disruption of the endothelial nitric oxide synthase gene (eNOS) did not remodel their ipsilateral common carotid arteries whereas wild-type mice did. Rather, the eNOS mutant mice displayed a paradoxical increase in wall thickness accompanied by a hyperplastic response of the arterial wall. These findings demonstrate a critical role for endogenous NO as a negative regulator of vascular smooth muscle proliferation in response to a remodeling stimulus. Furthermore, our data suggests that a primary defect in the NOS/NO pathway can promote abnormal remodeling and may facilitate pathological changes in vessel wall morphology associated with complex diseases such as hypertension and atherosclerosis.

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