Cited by 93Redox biology and oxidative stressNitric Oxide and Endothelin EffectsAntioxidant Activity and Oxidative Stress

Kinetic Analysis of Intracellular Concentrations of Reactive Nitrogen Species

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Lim, Chang Hoon, Dedon, Peter C., Deen, William M.·2008·Chemical Research in Toxicology

Abstract

Reactive nitrogen species derived from NO have been implicated in cancer and other diseases, but their intracellular concentrations are largely unknown. To estimate them under steady-state conditions representative of inflamed tissues, a kinetic model was developed that included the effects of cellular antioxidants, amino acids, proteins, and lipids. For an NO concentration of 1 microM, total peroxynitrite (Per, the sum of ONOO(-) and ONOOH), NO(2)(*), and N(2)O(3) were calculated to have concentrations in the nanomolar, picomolar, and femtomolar ranges, respectively. The concentrations of NO(2)(*) and N(2)O(3) were predicted to decrease markedly with increases in glutathione (GSH) levels, due to the scavenging of each by GSH. Although lipids accelerate the oxidation of NO by O(2) (because of the high solubility of each in hydrophobic media), lipid-phase reactions were calculated to have little effect on NO(2)(*) or N(2)O(3) concentrations. The major sources of intracellular NO(2)(*) were found to be the reaction of Per with metals and with CO(2), whereas the major sinks were its reactions with GSH and ascorbate (AH(-)). The radical-scavenging ability of GSH and AH(-) caused 3-nitrotyrosine to be the only tyrosine derivative predicted to be formed at a significant rate. The major GSH reaction product was S-nitrosoglutathione. Analytical (algebraic) expressions are provided for the concentrations of the key reactive intermediates, allowing the calculations to be extended readily.

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  • Mice partially or conditionally lacking MnSOD showed dilated cardiomyopathy characterized by left ventricle dilation, decreased wall thickness, and hypertrophy.

    “Further, mice partially or conditionally lacking MnSOD showed dilated cardiomyopathy characterized by left ventricle dilation, decreased wall thickness, and hypertrophy (584, 696).”
  • Mice completely lacking MnSOD died within weeks of birth.

    “Mice completely lacking MnSOD, leading to greater mitochondrial superoxide concentrations, died within weeks of birth (584), confirming the essentiality of mitochondrial superoxide scavenging.”

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Authors
Lim, C. H., Dedon, P. C., & Deen, W. M.
Affiliations
Massachusetts Institute of Technology (US)
Corresponding author
Deen, William M.
Venue
Chemical Research in Toxicology
Published
2008-10-02
Volume
21
Issue
11
Pages
2134-2147
ISSN
  • 0893-228X (ISSN-L)
  • 1520-5010
OpenAlex
W2089995708
Cited by
93
References
65
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 7 · 2022: 2 · 2021: 1 · 2020: 7 · 2019: 8 · 2018: 5 · 2017: 5 · 2016: 6 · 2015: 6 · 2014: 4 · 2013: 7 · 2012: 9
FWCI
2.47
Type
journal article
Language
en
Open access
Locations
  • Chemical Research in Toxicology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (P01-CA 26731, P01CA026731)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
Keywords
reactive nitrogen species, nitric oxide, peroxynitrite, nitrite, nitrous oxide, glutathione, vitamin C, S-nitrosoglutathione, nitrotyrosine, kinetic modeling, inflamed tissue, lipid oxidation, free radical scavenging
MeSH terms
Glutathione, Kinetics, Models, Biological, Nitric Oxide, Tyrosine, Hydroxyl Radical, Reactive Nitrogen Species, S-Nitrosoglutathione

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