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[Oxidative stress and antioxidants]

T Henriksen1, M Endresen

  • 1Kvinneklinikken og Cellebiologisk laboratorium, Aker sykehus, Oslo.

Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke
|January 30, 1994
PubMed
Summary

Oxidative stress occurs when cellular reactions become uncontrolled, potentially damaging DNA and proteins. Antioxidants, like vitamin E, may help limit this damage and reduce disease risk.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Pathophysiology

Context:

  • Oxidative stress is a cellular imbalance between reactive oxygen species production and antioxidant defenses.
  • Uncontrolled oxidative reactions lead to the accumulation of harmful free radicals, such as superoxide (O2.-) and hydroxyl radicals (OH.).
  • These radicals initiate lipid peroxidation, damaging cellular components like DNA, proteins, and carbohydrates.

Purpose:

  • To explain the mechanisms of oxidative stress at the cellular level.
  • To highlight the role of oxidative stress in various diseases.
  • To discuss the potential therapeutic role of antioxidants.

Summary:

  • Oxidative stress arises from an imbalance in cellular redox reactions, leading to the overproduction of reactive oxygen species.
  • Free radicals generated during oxidative stress, like hydroxyl radicals, damage cellular macromolecules through chain reactions, including lipid peroxidation.
  • This cellular damage is implicated in the pathogenesis of diseases such as cancer, atherosclerosis, and inflammatory conditions.

Impact:

  • Understanding oxidative stress mechanisms is crucial for developing targeted therapies for related diseases.
  • Antioxidants, including vitamin E, show promise in mitigating oxidative damage and potentially reducing disease incidence.
  • Further research into antioxidant interventions could lead to novel strategies for preventing and treating oxidative stress-related pathologies.

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