Cited by 89Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressEicosanoids and Hypertension Pharmacology

Glutathionylation Mediates Angiotensin II–Induced eNOS Uncoupling, Amplifying NADPH Oxidase‐Dependent Endothelial Dysfunction

Open access
Galougahi, Keyvan Karimi, Liu, Chia‐Chi, Gentile, Carmine, Kok, Cindy, Nunez, Andrea, Garcia, Alvaro, Fry, Natasha A. S., Davies, Michael J. +3 more·2014·Journal of the American Heart Association

Abstract

Background: Glutathionylation of endothelial nitric oxide synthase ( eNOS ) “uncouples” the enzyme, switching its function from nitric oxide (NO) to O 2 •− generation. We examined whether this reversible redox modification plays a role in angiotensin II (Ang II)‐induced endothelial dysfunction. Methods and Results: Ang II increased eNOS glutathionylation in cultured human umbilical vein endothelial cells (HUVECs), rabbit aorta, and human arteries in vitro. This was associated with decreased NO bioavailability and eNOS activity as well as increased O 2 •− generation. Ang II‐induced decrease in eNOS activity was mediated by glutathionylation, as shown by restoration of function by glutaredoxin‐1. Moreover, Ang II‐induced increase in O 2 •− and decrease in NO were abolished in HUVECs transiently transfected, with mutant eNOS rendered resistant to glutathionylation. Ang II effects were nicotinamide adenine dinucleotide phosphate (NADPH) oxidase dependent because preincubation with gp 91ds‐tat, an inhibitor of NADPH oxidase, abolished the increase in eNOS glutathionylation and loss of eNOS activity. Functional significance of glutathionylation in intact vessels was supported by Ang II‐induced impairment of endothelium‐dependent vasorelaxation that was abolished by the disulfide reducing agent, dithiothreitol. Furthermore, attenuation of Ang II signaling in vivo by administration of an angiotensin converting enzyme (ACE) inhibitor reduced eNOS glutathionylation, increased NO, diminished O 2 •− , improved endothelium‐dependent vasorelaxation and reduced blood pressure. Conclusions: Uncoupling of eNOS by glutathionylation is a key mediator of Ang II‐induced endothelial dysfunction, and its reversal is a mechanism for cardiovascular protection by ACE inhibition. We suggest that Ang II‐induced O 2 •− generation in endothelial cells, although dependent on NADPH oxidase, is amplified by glutathionylation‐dependent eNOS uncoupling.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1161/jaha.113.000731

Cites

38 of 38 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Galougahi, K. K., Liu, C., Gentile, C., Kok, C., Nunez, A., Garcia, A., Fry, N. A. S., Davies, M. J., Hawkins, C. L., Rasmussen, H. H., & Figtree, G. A.
Affiliations
The University of Sydney (AU)
Venue
Journal of the American Heart Association
Published
2014-03-24
Volume
3
Issue
2
Pages
e000731-e000731
ISSN
2047-9980 (ISSN-L)
OpenAlex
W2103098596
Cited by
89
References
38
Citations by year
2026: 4 · 2025: 1 · 2024: 3 · 2023: 5 · 2022: 8 · 2021: 7 · 2020: 9 · 2019: 11 · 2018: 7 · 2017: 14 · 2016: 6 · 2015: 12 · 2014: 2
FWCI
7.56
Type
journal article
Language
en
Open access
Licence
cc-by-nc
Locations
  • Journal of the American Heart Association (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
National Heart Foundation of Australia
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
glutathionylation, endothelial nitric oxide synthase, eNOS uncoupling, angiotensin II, endothelial dysfunction, NADPH oxidase, superoxide production, nitric oxide bioavailability, glutaredoxin 1, endothelium-dependent relaxation, angiotensin-converting enzyme inhibition, redox modification, blood pressure
MeSH terms
Angiotensin II, Animals, Aorta, Blood Pressure, Cells, Cultured, Endothelium, Vascular, Enzyme Inhibitors, Glutathione, Humans, Male, Mutation, Nitric Oxide, Oxidation-Reduction, Rabbits, Superoxides, Transfection, Vasodilation, Signal Transduction, NADPH Oxidases, Endothelial Cells, Nitric Oxide Synthase Type III, Human Umbilical Vein Endothelial Cells

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review