Cited by 1,957Nitric Oxide and Endothelin EffectsCardiovascular Health and Disease PreventionEicosanoids and Hypertension Pharmacology

Endothelial Nitric Oxide Synthase in Vascular Disease: From Marvel to Menace

Förstermann, Ulrich, Münzel, Thomas·2006·Circulation

Abstract

Nitric oxide (NO·) is an important protective molecule in the vasculature, and endothelial NO· synthase (eNOS) is responsible for most of the vascular NO· produced. A functional eNOS oxidizes its substrate l -arginine to l -citrulline and NO·. This normal function of eNOS requires dimerization of the enzyme, the presence of the substrate l -arginine, and the essential cofactor (6 R )-5,6,7,8-tetrahydro- l -biopterin (BH 4 ), one of the most potent naturally occurring reducing agents. Cardiovascular risk factors such as hypertension, hypercholesterolemia, diabetes mellitus, or chronic smoking stimulate the production of reactive oxygen species in the vascular wall. Nicotinamide adenine dinucleotide phosphate (NADPH) oxidases represent major sources of this reactive oxygen species and have been found upregulated and activated in animal models of hypertension, diabetes, and sedentary lifestyle and in patients with cardiovascular risk factors. Superoxide (O 2 · − ) reacts avidly with vascular NO· to form peroxynitrite (ONOO − ). The cofactor BH 4 is highly sensitive to oxidation by ONOO − . Diminished levels of BH 4 promote O 2 · − production by eNOS (referred to as eNOS uncoupling). This transformation of eNOS from a protective enzyme to a contributor to oxidative stress has been observed in several in vitro models, in animal models of cardiovascular diseases, and in patients with cardiovascular risk factors. In many cases, supplementation with BH 4 has been shown to correct eNOS dysfunction in animal models and patients. In addition, folic acid and infusions of vitamin C are able to restore eNOS functionality, most probably by enhancing BH 4 levels as well.

Integrity signals

Registry

Crossref · 10.1161/circulationaha.105.602532

Cites

68 of 68 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

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?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Förstermann, U., & Münzel, T.
Affiliations
From the Departments of Pharmacology (U.F.) and Internal Medicine II (Cardiology) (T.M.), Johannes Gutenberg University Hospitals, Mainz, Germany.
Venue
Circulation
Published
2006-04-04
Volume
113
Issue
13
Pages
1708-1714
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W2146190354
Cited by
1,957
References
67
Citations by year
2026: 93 · 2025: 76 · 2024: 99 · 2023: 86 · 2022: 110 · 2021: 113 · 2020: 110 · 2019: 89 · 2018: 105 · 2017: 105 · 2016: 117 · 2015: 101 · 2014: 123 · 2013: 98 · 2012: 85
FWCI
62.52
Type
journal article
Language
en
Open access
closed
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Health and Disease Prevention
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
endothelial nitric oxide synthase, nitric oxide, tetrahydrobiopterin, eNOS uncoupling, NADPH oxidase, reactive oxygen species, superoxide, peroxynitrite, oxidative stress, cardiovascular risk factors, hypertension, hypercholesterolemia, diabetes mellitus, smoking, folic acid, vitamin C, L-arginine
MeSH terms
Animals, Endothelium, Vascular, Humans, Nitric Oxide, Vascular Diseases, Reactive Oxygen Species, Oxidative Stress, Nitric Oxide Synthase Type III

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