Cited by 1,128Pulmonary Hypertension Research and TreatmentsNitric Oxide and Endothelin EffectsEicosanoids and Hypertension Pharmacology

Inhaled nitric oxide. A selective pulmonary vasodilator reversing hypoxic pulmonary vasoconstriction

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Frostell, C, Fratacci, M D, Wain, J C, Jones, R, Zapol, W M·1991·Circulation

Abstract

Background. The gas nitric oxide (NO) is an important endothelium-derived relaxing factor, inactivated by rapid combination with heme in hemoglobin. Methods and Results. Awake spontaneously breathing lambs inhaled 5-80 ppm NO with an acutely constricted pulmonary circulation due to either infusion of the stable thromboxane endoperoxide analogue U46619 or breathing a hypoxic gas mixture. Within 3 minutes after adding 40 ppm NO or more to inspired gas, pulmonary hypertension was reversed. Systemic vasodilation did not occur. Pulmonary hypertension resumed within 3-6 minutes of ceasing NO inhalation. During U46619 infusion pulmonary vasodilation was maintained up to 1 hour without tolerance. In the normal lamb, NO inhalation produced no hemodynamic changes. Breathing 80 ppm NO for 3 hours did not increase either methemoglobin or extravascular lung water levels nor modify lung histology compared with control lambs. Conclusions. Low dose inhaled NO (5-80 ppm) is a selective pulmonary vasodilator reversing both hypoxia- and thromboxane-induced pulmonary hypertension in the awake lamb [corrected].

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Authors
Frostell, C., Fratacci, M. D., Wain, J. C., Jones, R., & Zapol, W. M.
Affiliations
Harvard University (US)
Venue
Circulation
Published
1991-06
Volume
83
Issue
6
Pages
2038-2047
ISSN
  • 0009-7322 (ISSN-L)
  • 1524-4539
OpenAlex
W1927797304
Cited by
1,128
References
42
Citations by year
2026: 10 · 2025: 4 · 2024: 20 · 2023: 14 · 2022: 20 · 2021: 16 · 2020: 20 · 2019: 17 · 2018: 16 · 2017: 26 · 2016: 19 · 2015: 21 · 2014: 11 · 2013: 12 · 2012: 20
FWCI
80.86
Type
journal article
Language
en
Open access
Locations
  • Circulation (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (HL-42397, R01HL042397)
  • Fogarty International Center
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Pulmonary Hypertension Research and Treatments
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Eicosanoids and Hypertension Pharmacology
Keywords
inhaled nitric oxide, pulmonary vasodilation, hypoxic pulmonary vasoconstriction, pulmonary hypertension, thromboxane, U46619, endothelium-derived relaxing factor, hemoglobin, methemoglobin, extravascular lung water, lambs
MeSH terms
Administration, Inhalation, Animals, Hypoxia, Dose-Response Relationship, Drug, Drug Tolerance, Infusions, Intravenous, Nitric Oxide, Prostaglandin Endoperoxides, Synthetic, Pulmonary Circulation, Sheep, Time Factors, Vasoconstriction, Vasodilator Agents

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