Vascular effects following homozygous disruption of p47(phox) : An essential component of NADPH oxidase.

Abstract:

BACKGROUND:Evidence suggests that the vessel wall contains an oxidase similar, if not identical, to phagocytic NADPH oxidase. We tested the contribution of this specific oxidase to the progression of atherosclerosis and the regulation of blood pressure. METHODS AND RESULTS:An examination of aortic rings from wild-type mice and mice with homozygous targeted disruptions in p47(phox) revealed that p47(phox) knockout mice had a reduction in vascular superoxide production. However, analyses of apoE -/- p47(phox)+/+ and apoE -/- p47(phox) -/- strains of mice demonstrated no significant differences in atherosclerotic lesion sizes. Similarly, analyses of wild-type and p47(phox) knockout mice revealed no differences in either basal blood pressure or the rise in blood pressure seen after the pharmacological inhibition of nitric oxide synthase. CONCLUSIONS:NADPH oxidase contributes to basal vascular superoxide production. However, the absence of a functional oxidase does not significantly affect the progression of atherosclerosis in the standard mouse apoE -/- model, nor does it significantly influence basal blood pressure.

journal_name

Circulation

journal_title

Circulation

authors

Hsich E,Segal BH,Pagano PJ,Rey FE,Paigen B,Deleonardis J,Hoyt RF,Holland SM,Finkel T

doi

10.1161/01.cir.101.11.1234

subject

Has Abstract

pub_date

2000-03-21 00:00:00

pages

1234-6

issue

11

eissn

0009-7322

issn

1524-4539

journal_volume

101

pub_type

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