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Updated: Aug 2, 2026
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Production and Detection of Reactive Oxygen Species (ROS) in Cancers
Published on: November 21, 2011
Inflammation, free radicals, and antioxidants
1Department of Physiology, LSU Medical Center, Shreveport 71130-3932, USA.
Nutrition (Burbank, Los Angeles County, Calif.)
|April 1, 1996
Summary
Reactive oxygen metabolites from phagocytic leukocytes cause inflammatory tissue injury. Antioxidants like vitamins C and E may protect against this damage by scavenging free radicals and inhibiting NF-kB activation.
Area of Science:
- Biochemistry
- Immunology
- Cell Biology
Background:
- Inflammatory tissue injury is often mediated by reactive oxygen metabolites.
- Phagocytic leukocytes, such as neutrophils and macrophages, are primary sources of these damaging agents.
- Oxidative stress can lead to direct cellular damage and disruption of protease/antiprotease balance.
Purpose of the Study:
- To explore the role of reactive oxygen metabolites in inflammatory tissue injury.
- To investigate the mechanisms by which these metabolites induce inflammation, including gene upregulation.
- To examine the potential protective effects of antioxidants against oxidant-mediated inflammation.
Main Methods:
- Review of literature on reactive oxygen metabolites and inflammation.
- Analysis of the role of phagocytic leukocytes in generating oxidants.
- Discussion of the impact of oxidative stress on cellular components and gene expression.
- Exploration of the mechanism of NF-kB activation by oxidants.
Main Results:
- Reactive oxygen metabolites contribute to cytotoxicity and amplify inflammation by upregulating genes for cytokines and adhesion molecules.
- Activation of transcription factors like nuclear transcription factor kB (NF-kB) is implicated in oxidant-mediated gene expression.
- Vitamins C and E demonstrate potential protective effects by scavenging free radicals and inhibiting NF-kB activation.
Conclusions:
- Reactive oxygen metabolites play a significant role in inflammatory tissue injury and the amplification of inflammatory responses.
- Antioxidant nutrients, such as vitamins C and E, may mitigate oxidant-mediated inflammation and tissue damage.
- Maintaining adequate antioxidant status is a potential therapeutic strategy for inflammatory disorders.
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