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Micronutrients: oxidant/antioxidant status.

P Evans1, B Halliwell

  • 1Department of Haematology, Royal Free and University College Medical School, University College London, 98 Chenies Mews, London WC1E 6HX, UK. patricia.evans@ucl.ac.uk

The British Journal of Nutrition
|August 18, 2001
PubMed
Summary
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Reactive oxygen, nitrogen, and chlorine species are controlled by antioxidant defenses, which rely on micronutrients. Deficiencies in these micronutrients can impair antioxidant function and potentially worsen oxidative stress during infection.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Nutrition Science

Background:

  • Metabolic by-products include reactive oxygen, nitrogen, and chlorine species.
  • These reactive species function as physiological mediators and signaling molecules.
  • The body's antioxidant defense system regulates levels of these potentially damaging species.

Purpose of the Study:

  • To explore the role of the antioxidant defense system in controlling reactive species.
  • To highlight the dependence of antioxidant components on micronutrients.
  • To investigate the impact of micronutrient deficiencies on antioxidant system efficiency and oxidative stress.

Main Methods:

  • Review of existing literature on antioxidant systems and micronutrients.
  • Analysis of the interconnectedness of antioxidant defense components.

Related Experiment Videos

  • Examination of the relationship between micronutrient status and oxidative stress.

    • Main Results:

    • Key antioxidant system components are micronutrients (e.g., vitamins C and E) or depend on them (e.g., CuZn and Mn superoxide dismutase).
    • Antioxidant defenses operate as a coordinated system; deficiencies in one part can compromise others.
    • Micronutrient deficiencies may exacerbate oxidative stress, potentially influencing infection outcomes.

    Conclusions:

    • Micronutrients are crucial for maintaining the efficacy of the antioxidant defense system.
    • A compromised antioxidant system due to micronutrient deficiency can increase susceptibility to or severity of oxidative stress-related conditions, including infection.