Cited by 181Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressCardiovascular Health and Disease Prevention

Oxidative Stress and Endothelial Dysfunction in Aortas of Aged Spontaneously Hypertensive Rats by NOX1/2 Is Reversed by NADPH Oxidase Inhibition

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Wind, Sven, Beuerlein, Knut, Armitage, Melanie E., Taye, Ashraf, Kumar, Arun H.S., Janowitz, Daniel, Neff, Christina, Shah, Ajay M. +2 more·2010·Hypertension

Abstract

Arterial hypertension is associated with increased levels of reactive oxygen species, which may scavenge endothelium-derived NO and thereby diminish its vasorelaxant effects. However, the quantitatively relevant source of reactive oxygen species is unclear. Thus, this potential pathomechanism is not yet pharmacologically targetable. Several enzymatic sources of reactive oxygen species have been suggested: uncoupled endothelial NO synthase, xanthine oxidase, and NADPH oxidases. Here we show that increased reactive oxygen species formation in aortas of 12- to 14-month–old spontaneously hypertensive rats versus age-matched Wistar Kyoto rats is inhibited by the specific NADPH oxidase inhibitor VAS2870 but neither by the xanthine oxidase inhibitor oxypurinol nor the NO synthase inhibitor N G -nitro- l -arginine methyl ester. NADPH oxidase activity, as well as protein expression of its catalytic subunits, NOX1 and NOX2, was increased in the aortas of spontaneously hypertensive rats, whereas the expression of NOX4 protein, the most abundant NOX isoform, was not significantly changed. Impaired acetylcholine-induced relaxation of spontaneously hypertensive rat aortas was significantly improved by VAS2870. In conclusion, NOX1 and NOX2 but not NOX4 proteins are increased in aged spontaneously hypertensive rat aortas. Importantly, these NOX isoforms, in particular, ectopic expression of NOX1 in endothelial cells, appear to affect vascular function in an NADPH oxidase inhibitor-reversible manner. NADPH oxidases may, thus, be a novel target for the treatment of systemic hypertension.

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Authors
Wind, S., Beuerlein, K., Armitage, M. E., Taye, A., Kumar, A. H. S., Janowitz, D., Neff, C., Shah, A. M., Wingler, K., & Schmidt, H. H. H. W.
Affiliations
King's College London (GB)
Venue
Hypertension
Published
2010-09
Volume
56
Issue
3
Pages
490-497
ISSN
  • 0194-911X (ISSN-L)
  • 1524-4563
OpenAlex
W2116462934
Cited by
181
References
56
Citations by year
2026: 5 · 2025: 3 · 2024: 6 · 2023: 5 · 2022: 10 · 2021: 6 · 2020: 7 · 2019: 13 · 2018: 5 · 2017: 11 · 2016: 13 · 2015: 23 · 2014: 18 · 2013: 13 · 2012: 23
FWCI
11.91
Type
journal article
Language
en
Open access
Locations
  • Hypertension (publishedVersion)
  • PubMed (publishedVersion)
  • Research Publications (Maastricht University) (publishedVersion, other-oa)
  • Research Portal (King's College London) (submittedVersion)
  • Research Publications (Maastricht University) (submittedVersion, other-oa)
Funders
British Heart Foundation (RG/08/011/25922)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
Keywords
NADPH oxidase, NOX1, NOX2, NOX4, oxidative stress, endothelial dysfunction, spontaneously hypertensive rats, hypertension, aging, reactive oxygen species, VAS2870, acetylcholine-induced relaxation, endothelial nitric oxide, xanthine oxidase, endothelial nitric oxide synthase, aorta
MeSH terms
NADPH Oxidase 1, NADPH Oxidase 2, Acetylcholine, Aging, Analysis of Variance, Animals, Aorta, Endothelium, Vascular, Fluorescent Antibody Technique, Hypertension, Male, Membrane Glycoproteins, NADH, NADPH Oxidoreductases, Rats, Inbred SHR, Rats, Inbred WKY, Xanthine Oxidase, Blotting, Western, Reactive Oxygen Species, Oxidative Stress, NADPH Oxidases, Rats, Nitric Oxide Synthase Type III

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