Cited by 2,931Neutrophil, Myeloperoxidase and Oxidative MechanismsRedox biology and oxidative stressBioactive Compounds and Antitumor Agents

Biological defense mechanisms. The production by leukocytes of superoxide, a potential bactericidal agent

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Babior, Bernard M., Kipnes, Ruby S., Curnutte, John T.·1973·Journal of Clinical Investigation

Abstract

As a highly reactive substance produced in biological systems by the one-electron reduction of oxygen, superoxide (O(2) (-)) seemed a likely candidate as a bactericidal agent in leukocytes. The reduction of cytochrome c, a process in which O(2) (-) may serve as an electron donor, was found to occur when the cytochrome was incubated with leukocytes. O(2) (-) was identified as the agent responsible for the leukocyte-mediated reduction of cytochrome c by the demonstration that the reaction was abolished by superoxide dismutase, an enzyme that destroys O(2) (-), but not by boiled dismutase, albumin, or catalase. Leukocyte O(2) (-) production doubled in the presence of latex particles. The average rate of formation of O(2) (-) in the presence of these particles was 1.03 nmol/10(7) cells per 15 min. This rate, however, is only a lower limit of the true rate of O(2) (-) production, since any O(2) (-) which reacted with constituents other than cytochrome c would have gone undetected. Thus. O(2) (-) is made by leukocytes under circumstances which suggest that it may be involved in bacterial killing.

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Authors
Babior, B. M., Kipnes, R. S., & Curnutte, J. T.
Affiliations
Tufts Medical Center (US)
Venue
Journal of Clinical Investigation
Published
1973-03-01
Volume
52
Issue
3
Pages
741-744
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2117966002
Cited by
2,931
References
12
Citations by year
2026: 16 · 2025: 18 · 2024: 18 · 2023: 32 · 2022: 25 · 2021: 45 · 2020: 28 · 2019: 36 · 2018: 33 · 2017: 40 · 2016: 49 · 2015: 42 · 2014: 52 · 2013: 52 · 2012: 38
FWCI
19.10
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (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
  • Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Keywords
superoxide, leukocytes, bactericidal activity, cytochrome c reduction, superoxide dismutase, latex particles, reactive oxygen species, bacterial killing, phagocytes
MeSH terms
Cytochrome c Group, Humans, Latex, Leukocytes, Microspheres, Oxidation-Reduction, Oxygen, Oxygen Consumption, Superoxide Dismutase

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