Cited by 137Cardiac Ischemia and ReperfusionNitric Oxide and Endothelin EffectsNeurological Disorders and Treatments

Nitrite confers protection against myocardial infarction: Role of xanthine oxidoreductase, NADPH oxidase and KATP channels

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Baker, John E., Su, Jidong, Fu, Xiangping, Hsu, Anna, Gross, Garrett J., Tweddell, James S., Hogg, Neil·2007·Journal of Molecular and Cellular Cardiology

Abstract

Reduction of nitrite to nitric oxide during ischemia protects the heart against injury from ischemia/reperfusion. However the optimal dose of nitrite and the mechanisms underlying nitrite-induced cardioprotection are not known. We determined the ability of nitrite and nitrate to confer protection against myocardial infarction in two rat models of ischemia/reperfusion injury and the role of xanthine oxidoreductase, NADPH oxidase, nitric oxide synthase and K(ATP) channels in mediating nitrite-induced cardioprotection. In vivo and in vitro rat models of myocardial ischemia/reperfusion injury were used to cause infarction. Hearts (n=6/group) were treated with nitrite or nitrate for 15 min prior to 30 min regional ischemia and 180 min reperfusion. Xanthine oxidoreductase activity was measured after 15 min aerobic perfusion and 30 min ischemia. Nitrite reduced myocardial necrosis and decline in ventricular function following ischemia/reperfusion in the intact and isolated rat heart in a dose- or concentration-dependent manner with an optimal dose of 4 mg/kg in vivo and concentration of 10 microM in vitro. Nitrate had no effect on protection. Reduction in infarction by nitrite was abolished by the inhibition of flavoprotein reductases and the molybdenum site of xanthine oxidoreductase and was associated with an increase in activity of xanthine dehydrogenase and xanthine oxidase during ischemia. Inhibition of nitric oxide synthase had no effect on nitrite-induced cardioprotection. Inhibition of NADPH oxidase and K(ATP) channels abolished nitrite-induced cardioprotection. Nitrite but not nitrate protects against infarction by a mechanism involving xanthine oxidoreductase, NADPH oxidase and K(ATP) channels.

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Crossref · 10.1016/j.yjmcc.2007.07.057

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  • The nitrate/nitrite content of fruits and vegetables could contribute to their cardiovascular health benefits in animals and humans.

    “the nitrate/nitrite content of the fruits and vegetables could contribute to their cardiovascular health benefits in animals [29,33,78,79,80,81,82,83] and humans [31,84,85,86].”

    From NO-Rich Diet for Lifestyle-Related Diseases (2015) · cites this paper as [81]

  • Low concentrations of nitrite mediate cytoprotection in a variety of tissues in animal models including heart, liver, brain, kidney, hindlimb, and human forearm.

    “The efficacy of low concentrations of nitrite in mediating cytoprotection has been demonstrated in a variety of tissues in animal models including heart [8, 9, 55, 118–122] liver [9, 120, 123], brain [124–126], kidney [127, 128], hindlimb [129], and human forearm [23].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [118]

  • Nitrite-mediated cytoprotection is mediated by NO production from the molybdenum-containing enzyme XOR and to some extent SO.

    “Numerous studies have suggested that nitrite-mediated cytoprotection is mediated by NO production from the molybdenum containing enzyme XOR [8, 39, 86, 118, 127] and to some extent SO [39] as well.”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [118]

  • XOR inhibition abolished the protective effect of nitrite in perfused rat heart models.

    “and also showed that XOR inhibition abolished the protective effect of nitrite in perfused rate heart models [118].”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [118]

  • Nitrite was protective in a rat in vivo model of myocardial IR.

    “Nitrite was shown to be protective in a rat in vivo model of myocardial IR”

    From Mechanisms of nitrite bioactivation (2014) · cites this paper as [118]

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Authors
Baker, J. E., Su, J., Fu, X., Hsu, A., Gross, G. J., Tweddell, J. S., & Hogg, N.
Affiliations
  • Children's Hospital of Wisconsin (US)
  • Medical College of Wisconsin (US)
Corresponding author
Baker, John E.
Venue
Journal of Molecular and Cellular Cardiology
Publisher
Elsevier BV
Published
2007-10
Volume
43
Issue
4
Pages
437-444
ISSN
0022-2828 (ISSN-L)
OpenAlex
W2079200111
Cited by
137
References
40
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 7 · 2022: 5 · 2021: 5 · 2020: 4 · 2019: 3 · 2018: 4 · 2017: 11 · 2016: 4 · 2015: 14 · 2014: 12 · 2013: 14 · 2012: 5
FWCI
7.08
Type
journal article
Language
en
Open access
Locations
  • Journal of Molecular and Cellular Cardiology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Neuroscience › Neurology › Neurological Disorders and Treatments
Keywords
nitrite, nitrate, myocardial infarction, ischemia-reperfusion injury, cardioprotection, xanthine oxidoreductase, NADPH oxidase, ATP-sensitive potassium channels, nitric oxide, flavoprotein reductase, xanthine dehydrogenase, xanthine oxidase, nitric oxide synthase, myocardial necrosis, ventricular function
MeSH terms
Animals, Cardiotonic Agents, Dose-Response Relationship, Drug, Male, Myocardial Infarction, Nitrates, Nitric Oxide, Nitrites, Time Factors, Xanthine Dehydrogenase, Rats, Sprague-Dawley, NADPH Oxidases, Rats, KATP Channels

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