Cited by 116Nitric Oxide and Endothelin EffectsGout, Hyperuricemia, Uric AcidEicosanoids and Hypertension Pharmacology

Xanthine oxidase and mitochondria contribute to vascular superoxide anion generation in DOCA-salt hypertensive rats

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Viel, Emilie C., Benkirane, Karim, Javeshghani, Danesh, Touyz, Rhian M., Schiffrin, Ernesto L.·2008·American Journal of Physiology-Heart and Circulatory Physiology

Abstract

Vascular superoxide anion (O(2)(*-)) levels are increased in DOCA-salt hypertensive rats. We hypothesized that the endothelin (ET)-1-induced generation of ROS in the aorta and resistance arteries of DOCA-salt rats originates partly from xanthine oxidase (XO) and mitochondria. Accordingly, we blocked XO and the mitochondrial oxidative phosphorylation chain to investigate their contribution to ROS production in mesenteric resistance arteries and the aorta from DOCA-salt rats. Systolic blood pressure rose in DOCA-salt rats and was reduced after 3 wk by apocynin [NAD(P)H oxidase inhibitor and/or radical scavenger], allopurinol (XO inhibitor), bosentan (ET(A/B) receptor antagonist), BMS-182874 (BMS; ET(A) receptor antagonist), and hydralazine. Plasma uric acid levels in DOCA-salt rats were similar to control unilaterally nephrectomized (UniNx) rats, reduced with allopurinol and bosentan, and increased with BMS. Levels of thiobarbituric acid-reacting substances were increased in DOCA-salt rats versus UniNx rats, and BMS, bosentan, and hydralazine prevented their increase. Dihydroethidium staining showed reduced O(2)(*-) production in mesenteric arteries and the aorta from BMS- and bosentan-treated DOCA-salt rats compared with untreated DOCA-salt rats. Increased O(2)(*-) derived from XO was reduced or prevented by all treatments in mesenteric arteries, whereas bosentan and BMS had no effect on aortas from DOCA-salt rats. O(2)(*-) generation decreased with in situ treatment by tenoyltrifluoroacetone and CCCP, inhibitors of mitochondrial electron transport complexes II and IV, respectively, whereas rotenone (mitochondrial complex I inhibitor) had no effect. Our findings demonstrate the involvement of ET(A) receptor-modulated O(2)(*-) derived from XO and from mitochondrial oxidative enzymes in arteries from DOCA-salt rats.

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  1. [32]Patetsios P, Song M, Shutze WP, Pappas C, Rodino W, Ramirez JA, Panetta TF. Identification of uric acid and xanthine oxidase in atherosclerotic plaque. Am J Cardiol 88: 188–191, 2001. [DOI] [PubMed] [Google Scholar]
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Authors
Viel, E. C., Benkirane, K., Javeshghani, D., Touyz, R. M., & Schiffrin, E. L.
Venue
American Journal of Physiology-Heart and Circulatory Physiology
Published
2008-07
Volume
295
Issue
1
Pages
H281-H288
ISSN
  • 0363-6135 (ISSN-L)
  • 1522-1539
OpenAlex
W2156106643
Cited by
116
References
50
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 2 · 2022: 4 · 2021: 3 · 2020: 3 · 2019: 5 · 2018: 3 · 2017: 3 · 2016: 13 · 2015: 9 · 2014: 12 · 2013: 14 · 2012: 13
FWCI
5.87
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Heart and Circulatory Physiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
Funders
  • Bristol-Myers Squibb
  • Canada Research Chairs
  • Bristol-Myers Squibb Canada
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Nephrology › Gout, Hyperuricemia, Uric Acid
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
xanthine oxidase, endothelin-1, ETA receptor, reactive oxygen species, DOCA-salt hypertension, resistance arteries, aorta, apocynin, allopurinol, bosentan, hydralazine, uric acid, lipid peroxidation, mitochondrial electron transport chain, CCCP, rotenone
MeSH terms
Animals, Antihypertensive Agents, Aorta, Blood Pressure, Creatinine, Desoxycorticosterone, Disease Models, Animal, Enzyme Inhibitors, Hypertension, Male, Mesenteric Arteries, Mitochondria, Nephrectomy, Oxidative Phosphorylation, Superoxides, Uncoupling Agents, Uric Acid, Vascular Resistance, Xanthine Oxidase, Lipid Peroxidation, Free Radical Scavengers, Rats, Sprague-Dawley, Thiobarbituric Acid Reactive Substances, Receptors, Endothelin, NADPH Oxidases, Endothelin-1, Rats, Endothelin Receptor Antagonists

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