Cited by 12,064Nitric Oxide and Endothelin EffectsCardiovascular, Neuropeptides, and Oxidative Stress ResearchEicosanoids and Hypertension Pharmacology

The obligatory role of endothelial cells in the relaxation of arterial smooth muscle by acetylcholine

Furchgott, Robert F., Zawadzki, John V.·1980·Nature

Abstract

Despite its very potent vasodilating action in vivo, acetylcholine (ACh) does not always produce relaxation of isolated preparations of blood vessels in vitro. For example, in the helical strip of the rabbit descending thoracic aorta, the only reported response to ACh has been graded contractions, occurring at concentrations above 0.1 muM and mediated by muscarinic receptors. Recently, we observed that in a ring preparation from the rabbit thoracic aorta, ACh produced marked relaxation at concentrations lower than those required to produce contraction (confirming an earlier report by Jelliffe). In investigating this apparent discrepancy, we discovered that the loss of relaxation of ACh in the case of the strip was the result of unintentional rubbing of its intimal surface against foreign surfaces during its preparation. If care was taken to avoid rubbing of the intimal surface during preparation, the tissue, whether ring, transverse strip or helical strip, always exhibited relaxation to ACh, and the possibility was considered that rubbing of the intimal surface had removed endothelial cells. We demonstrate here that relaxation of isolated preparations of rabbit thoracic aorta and other blood vessels by ACh requires the presence of endothelial cells, and that ACh, acting on muscarinic receptors of these cells, stimulates release of a substance(s) that causes relaxation of the vascular smooth muscle. We propose that this may be one of the principal mechanisms for ACh-induced vasodilation in vivo. Preliminary reports on some aspects of the work have been reported elsewhere.

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Crossref · 10.1038/288373a0

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Authors
Furchgott, R. F., & Zawadzki, J. V.
Affiliations
SUNY Downstate Health Sciences University (US)
Venue
Nature
Published
1980-11
Volume
288
Issue
5789
Pages
373-376
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2169182236
Cited by
12,064
References
1
Citations by year
2026: 86 · 2025: 108 · 2024: 116 · 2023: 141 · 2022: 151 · 2021: 178 · 2020: 208 · 2019: 213 · 2018: 209 · 2017: 212 · 2016: 202 · 2015: 240 · 2014: 332 · 2013: 268 · 2012: 289
FWCI
35.95
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Surgery › Cardiovascular, Neuropeptides, and Oxidative Stress Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
acetylcholine, endothelial cells, vasorelaxation, thoracic aorta, muscarinic receptors, endothelium-dependent vasodilation
MeSH terms
Acetylcholine, Animals, Hypoxia, Aorta, Thoracic, Microbial Collagenase, Endothelium, Male, Rabbits, Receptors, Cholinergic, Receptors, Muscarinic, Vasomotor System

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