Cited by 92Nitric Oxide and Endothelin EffectsRedox biology and oxidative stressAntioxidant Activity and Oxidative Stress

The redox interplay between nitrite and nitric oxide: From the gut to the brain

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Pereira, Cassilda, Ferreira, Nuno R., Rocha, Bárbara S., Barbosa, Rui M., Laranjinha, João·2013·Redox Biology

Abstract

The reversible redox conversion of nitrite and nitric oxide ((•)NO) in a physiological setting is now widely accepted. Nitrite has long been identified as a stable intermediate of (•)NO oxidation but several lines of evidence support the reduction of nitrite to nitric oxide in vivo. In the gut, this notion implies that nitrate from dietary sources fuels the longstanding production of nitrite in the oral cavity followed by univalent reduction to (•)NO in the stomach. Once formed, (•)NO boosts a network of reactions, including the production of higher nitrogen oxides that may have a physiological impact via the post-translational modification of proteins and lipids. Dietary compounds, such as polyphenols, and different prandial states (secreting specific gastric mediators) modulate the outcome of these reactions. The gut has unusual characteristics that modulate nitrite and (•)NO redox interplay: (1) wide range of pH (neutral vs acidic) and oxygen tension (c.a. 70 Torr in the stomach and nearly anoxic in the colon), (2) variable lumen content and (3) highly developed enteric nervous system (sensitive to (•)NO and dietary compounds, such as glutamate). The redox interplay of nitrite and (•)NO might also participate in the regulation of brain homeostasis upon neuronal glutamatergic stimulation in a process facilitated by ascorbate and a localized and transient decrease of oxygen tension. In a way reminiscent of that occurring in the stomach, a nitrite/(•)NO/ascorbate redox interplay in the brain at glutamatergic synapses, contributing to local (•)NO increase, may impact on (•)NO-mediated process. We here discuss the implications of the redox conversion of nitrite to (•)NO in the gut, how nitrite-derived (•)NO may signal from the digestive to the central nervous system, influencing brain function, as well as a putative ascorbate-driven nitrite/NO pathway occurring in the brain.

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Crossref · 10.1016/j.redox.2013.04.004

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  • Dietary antioxidants (e.g., polyphenols and ascorbate) may further enhance nitrite reduction and stabilise reactive nitrogen species.

    “Dietary antioxidants (e.g., polyphenols and ascorbate) may further enhance this process and stabilise reactive nitrogen species [51].”

    From Dietary Nitrate-Rich Vegetables as Natural Modulators of Health: Mechanisms and Benefits in Ageing Populations (2026) · cites this paper as [51]

    The ‘Reduction by dietary polyphenols’ section says polyphenol-rich foods, similarly to ascorbate, boost nitric oxide production from nitrite in the acidic stomach. The copy does not say that these compounds stabilise reactive nitrogen species; it instead describes subsequent reactions that form nitroso derivatives and nitrated phenols. Page numbers were not available in the supplied copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Nitrite acts as a redox-active intermediate that serves as both an oxidation product of NO and a substrate for its regeneration.

    “At the biochemical level, nitrite acts as a redox-active intermediate that serves as both an oxidation product of NO and a substrate for its regeneration [51].”
  • There exists a broad range of redox-derived nitrogen oxides that exert both cGMP-dependent and -independent signaling actions as a result of nitrosative-, nitrative- and oxidative-induced post-translational protein modifications and subsequent changes in protein function and gene expression profiles.

    “There exists a broad range of redox-derived nitrogen oxides that exert both cGMP-dependent and -independent signaling actions as a result of nitrosative-, nitrative- and oxidative-induced post-translational protein modifications and subsequent changes in protein function and gene expression profiles[100–102].”

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Authors
Pereira, C., Ferreira, N. R., Rocha, B. S., Barbosa, R. M., & Laranjinha, J.
Affiliations
Centro de Neurociências e Biologia Celular (PT)
Corresponding author
Laranjinha, João
Venue
Redox Biology
Publisher
Elsevier BV
Published
2013
Volume
1
Issue
1
Pages
276-284
ISSN
2213-2317 (ISSN-L)
OpenAlex
W2050609518
Cited by
92
References
135
Citations by year
2026: 7 · 2025: 10 · 2024: 8 · 2023: 6 · 2022: 7 · 2021: 7 · 2020: 9 · 2019: 5 · 2018: 8 · 2017: 9 · 2016: 6 · 2015: 7 · 2014: 1 · 2013: 1
FWCI
0.55
Type
journal article
Language
en
Open access
Locations
  • Redox Biology (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) (submittedVersion, cc-by-nc-nd)
Funders
  • Fundação para a Ciência e Tecnologia (Portugal) (PTDC/AGR-ALI/115744/2009, PTDC/SAU-NEU/108992/2008, PTDC/SAU-NEU/103538/2008)
  • CNC (PEst-C/SAU/LA0001/2011)
Topics
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
nitrite, nitric oxide, redox conversion, nitrate, gut-brain axis, polyphenols, vitamin C, glutamate, enteric nervous system, oxygen partial pressure, post-translational modification, brain homeostasis, glutamatergic synapses
MeSH terms
Animals, Brain, Humans, Nitric Oxide, Nitrites, Oxidation-Reduction, Gastrointestinal Tract

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