Cited by 456Nitric Oxide and Endothelin EffectsNeutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stress

Localization of a constitutively active, phagocyte-like NADPH oxidase in rabbit aortic adventitia: Enhancement by angiotensin II

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Pagano, Patrick J., Clark, Justin K., Cifuentes-Pagano, M. Eugenia, Clark, Stacie M., Callis, Gayle M., Quinn, Mark T.·1997·Proceedings of the National Academy of Sciences

Abstract

Superoxide anion (O 2 − ) plays a key role in the endogenous suppression of endothelium-derived nitric oxide (NO) bioactivity and has been implicated in the development of hypertension. In previous studies, we found that O 2 − is produced predominantly in the adventitia of isolated rabbit aorta and acts as a barrier to NO. In the present studies, we characterize the enzyme responsible for O 2 − production in the adventitia and show that this enzyme is a constitutively active NADPH oxidase with similar composition as the phagocyte NADPH oxidase. Constitutive O 2 − -generating activity was localized to aortic adventitial fibroblasts and was enhanced by the potent vasoconstrictor angiotensin II. Immunohistochemistry of aortic sections demonstrated the presence of p22 phox , gp91 phox , p47 phox , and p67 phox localized exclusively in rabbit aortic adventitia, coincident with the site of staining for O 2 − production. Furthermore, immunodepletion of p67 phox from adventitial fibroblast particulates resulted in the loss of NADPH oxidase activity, which could be restored by the addition of recombinant p67 phox . Further study into the regulation of this adventitial source of O 2 − is important in elucidating the mechanisms regulating the bioactivity of NO and may contribute to our understanding of the pathogenesis of hypertension.

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Authors
Pagano, P. J., Clark, J. K., Cifuentes-Pagano, M. E., Clark, S. M., Callis, G. M., & Quinn, M. T.
Affiliations
  • Boston Medical Center (US)
  • Vascular Biology Unit, Boston Medical Center, Boston, MA 02118; and Department of Veterinary Molecular Biology, Montana State University, Bozeman, MT 59717
Venue
Proceedings of the National Academy of Sciences
Published
1997-12-23
Volume
94
Issue
26
Pages
14483-14488
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2170708014
Cited by
455
References
48
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 2 · 2020: 8 · 2019: 8 · 2018: 3 · 2017: 8 · 2016: 12 · 2015: 4 · 2014: 14 · 2013: 9 · 2012: 14
FWCI
12.21
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (7r29hl055425-03)
  • National Heart, Lung, and Blood Institute (R29 HL55425-02, R01HL055425)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (R01AR042426)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
NADPH oxidase, superoxide, aortic adventitia, adventitial fibroblasts, angiotensin II, p67phox, p22phox, gp91phox, p47phox, nitric oxide, hypertension, vasoconstriction, rabbits
MeSH terms
Angiotensin II, Animals, Aorta, Cells, Cultured, Immunohistochemistry, NADPH Dehydrogenase, Phagocytes, Phosphoproteins, Rabbits, Vasoconstrictor Agents, NADPH Oxidases, Membrane Transport Proteins

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