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Related Experiment Videos

Vitamin E prevents exercise-induced DNA damage

A Hartmann1, A M Niess, M Grünert-Fuchs

  • 1Abteilung Medizinische Genetik, Universität Ulm, Germany.

Mutation Research
|April 1, 1995
PubMed
Summary
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Exhaustive exercise causes DNA damage in white blood cells (WBC). Vitamin E supplementation, especially for 14 days, significantly reduces this exercise-induced DNA damage, indicating its protective role against oxidative stress.

Area of Science:

  • Exercise physiology
  • Molecular biology
  • Nutritional science

Background:

  • Exhaustive exercise can induce oxidative stress and DNA damage.
  • The role of antioxidants in mitigating exercise-induced cellular damage is an area of interest.

Purpose of the Study:

  • To investigate DNA damage in human white blood cells (WBC) following exhaustive exercise.
  • To determine the effect of vitamin E supplementation on exercise-induced DNA damage and oxidative stress.

Main Methods:

  • Single cell gel electrophoresis (Comet assay) was used to measure DNA strand breaks in WBC.
  • Blood samples were collected before and 24 hours after treadmill running to exhaustion.
  • Serum malondialdehyde (MDA) levels were measured as a marker of lipid peroxidation.

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Main Results:

  • A significant increase in DNA strand breakage was observed in WBC 24 hours after exhaustive exercise in all subjects.
  • Short-term multivitamin or vitamin E (3 x 800 mg) supplementation reduced DNA damage in some individuals.
  • 14-day supplementation with vitamin E (1200 mg daily) significantly reduced exercise-induced DNA damage in all subjects, completely preventing it in 80% of participants.
  • Vitamin E supplementation increased serum vitamin E concentrations and decreased serum MDA levels.

Conclusions:

  • Vitamin E supplementation effectively prevents exercise-induced DNA damage in human WBC.
  • Exhaustive exercise leads to DNA breakage in WBC, likely as a consequence of oxidative stress.
  • Vitamin E may serve as a protective agent against exercise-induced oxidative stress and DNA damage.