Cited by 358Neutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stressFree Radicals and Antioxidants

Kinetics and Mechanisms of Hypochlorous Acid Reactions

Folkes, Lisa K., Candeias, Luis P., Wardman, Peter·1995·Archives of Biochemistry and Biophysics

Abstract

Hypochlorous acid (HOCl) is a strong oxidant formed in neutrophils by the myeloperoxidase-catalyzed oxidation of chloride. Using stopped-flow with spectrophotometric detection, HOCl was found to react very rapidly with glutathione and ascorbate and less rapidly with taurine. No evidence could be found for the formation of reactive free-radical intermediates in these reactions, in support of an electrophilic mechanism. In contrast, the reaction with iron(II) aquo or citrate complexes (k approximately 10(4) dm3 mol-1 s-1 in acidic solution) yielded reactive intermediates distinguishable from hydroxyl radicals. The reaction between HOCl and ferrous ions, which is analogous to but faster than the Fenton reaction, is a potential source of free radicals in activated neutrophils.

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Crossref · 10.1006/abbi.1995.0017

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Authors
Folkes, L. K., Candeias, L. P., & Wardman, P.
Affiliations
Mount Vernon Hospital (GB)
Venue
Archives of Biochemistry and Biophysics
Publisher
Elsevier BV
Published
1995-10
Volume
323
Issue
1
Pages
120-126
ISSN
0003-9861 (ISSN-L)
OpenAlex
W1972880155
Cited by
358
References
0
Citations by year
2026: 5 · 2025: 21 · 2024: 12 · 2023: 7 · 2022: 21 · 2021: 16 · 2020: 12 · 2019: 16 · 2018: 8 · 2017: 11 · 2016: 10 · 2015: 10 · 2014: 10 · 2013: 16 · 2012: 20
FWCI
3.82
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of Biochemistry and Biophysics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Neutrophil, Myeloperoxidase and Oxidative Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Physical Sciences › Chemistry › Organic Chemistry › Free Radicals and Antioxidants
Keywords
hypochlorous acid, reaction kinetics, reaction mechanism, glutathione, vitamin C, taurine, iron(II) complexes, ferrous iron oxidation, Fenton reaction, hydroxyl radicals, radical intermediates, myeloperoxidase
MeSH terms
Ascorbic Acid, Free Radicals, Glutathione, Hypochlorous Acid, Kinetics, Taurine

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