Cited by 551Neutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stressBioactive Compounds and Antitumor Agents

The effect of the inhibitor diphenylene iodonium on the superoxide-generating system of neutrophils. Specific labelling of a component polypeptide of the oxidase

Open access
Cross, A R, Jones, O T G·1986·Biochemical Journal

Abstract

NADPH-dependent superoxide production by the solubilized oxidase of neutrophils was inhibited 36% by diphenylene iodonium at a 1:1 stoichiometry with the enzyme flavoprotein content. Addition of diphenylene iodonium strongly inhibited the NADPH-dependent reduction of both FAD and cytochrome b-245 in steady-state kinetic experiments. Incubation of solubilized enzyme with diphenylene [125I]iodonium resulted in the specific labelling of a polypeptide of Mr 45,000. In the presence of NADPH the amount of label incorporated into the polypeptide was reduced. There was no difference in labelling between enzyme prepared from stimulated or unstimulated cells.

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  1. Bloxham, D. P. (1979) Biochem. Soc. Trans. 7, 103-106

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Authors
Cross, A. R., & Jones, O. T. G.
Affiliations
University of Bristol (GB)
Venue
Biochemical Journal
Published
1986-07-01
Volume
237
Issue
1
Pages
111-116
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W1801129364
Cited by
551
References
22
Citations by year
2026: 2 · 2025: 5 · 2024: 1 · 2023: 5 · 2022: 7 · 2021: 5 · 2020: 9 · 2019: 12 · 2018: 13 · 2017: 14 · 2016: 9 · 2015: 13 · 2014: 9 · 2013: 19 · 2012: 20
FWCI
5.47
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Medical Research Council
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
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Keywords
diphenyleneiodonium, neutrophil NADPH oxidase, superoxide production, flavoprotein, enzyme inhibition, FAD reduction, NADPH-dependent reduction, respiratory burst
MeSH terms
Animals, Electrophoresis, Polyacrylamide Gel, NADH, NADPH Oxidoreductases, NADP, Neutrophils, Onium Compounds, Protein Binding, Swine, NADPH Oxidases, In Vitro Techniques

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