Cited by 68Nitric Oxide and Endothelin EffectsPulmonary Hypertension Research and TreatmentsHemoglobin structure and function

Nitrite signaling in pulmonary hypertension: mechanisms of bioactivation, signaling, and therapeutics

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Bueno, Marta, Wang, Jun, Mora, Ana L., Gladwin, Mark T.·2013·Antioxidants & Redox Signaling

Abstract

SIGNIFICANCE: Pulmonary arterial hypertension (PAH) is a disorder characterized by increased pulmonary vascular resistance and mean pulmonary artery pressure leading to impaired function of the right ventricle, reduced cardiac output, and death. An imbalance between vasoconstrictors and vasodilators plays an important role in the pathobiology of PAH. RECENT ADVANCES: Nitric oxide (NO) is a potent vasodilator in the lung, whose bioavailability and signaling pathway are impaired in PAH. It is now appreciated that the oxidative product of NO metabolism, the inorganic anion nitrite (NO(2)(-)), functions as an intravascular endocrine reservoir of NO bioactivity that can be reduced back to NO under physiological and pathological hypoxia. CRITICAL ISSUES: The conversion of nitrite to NO is controlled by coupled electron and proton transfer reactions between heme- and molybdenum-containing proteins, such as hemoglobin and xanthine oxidase, and by simple protonation and disproportionation, and possibly by catalyzed disproportionation. The two major sources of nitrite (and nitrate) are the endogenous L-arginine-NO pathway, by oxidation of NO, and the diet, with conversion of nitrate from diet into nitrite by oral commensal bacteria. In the current article, we review the enzymatic formation of nitrite and the available data regarding its use as a therapy for PAH and other cardiovascular diseases. FUTURE DIRECTIONS: The successful efficacy demonstrated in several animal models and safety in early clinical trials suggest that nitrite may represent a promising new therapy for PAH.

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Authors
Bueno, M., Wang, J., Mora, A. L., & Gladwin, M. T.
Affiliations
University of Pittsburgh (US)
Corresponding author
Gladwin, Mark T.
Venue
Antioxidants & Redox Signaling
Published
2013-05
Volume
18
Issue
14
Pages
1797-1809
ISSN
  • 1523-0864 (ISSN-L)
  • 1557-7716
OpenAlex
W2030797425
Cited by
68
References
88
Citations by year
2025: 1 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 5 · 2020: 6 · 2019: 1 · 2018: 5 · 2017: 4 · 2016: 10 · 2015: 11 · 2014: 10 · 2013: 7
FWCI
0.96
Type
journal article
Language
en
Open access
Locations
  • Antioxidants and Redox Signaling (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Pittsburgh
  • Hemophilia Center of Western Pennsylvania
  • National Institutes of Health (PO1-HL-103455)
  • National Heart, Lung, and Blood Institute (R01HL096973, P01HL103455, R01HL098032)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Pulmonary Hypertension Research and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hemoglobin structure and function
Keywords
pulmonary arterial hypertension, nitric oxide bioavailability, nitrite reductase, xanthine oxidase, hemoglobin, nitrate, L-arginine-NO pathway, nitrite therapy, hypoxia, pulmonary vascular resistance
MeSH terms
Animals, Humans, Hypertension, Pulmonary, Nitrates, Nitric Oxide, Nitrites, Vascular Diseases, Signal Transduction

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