Regular exercise attenuates oxidative stress in aging rat tissues

A possible mechanism toward anti-aging medicine

Sataro Goto, Zsolt Radak

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Regular exercise is known to exhibit various health benefits in reducing risks of age-related diseases such as cardiovascular diseases, type 2 diabetes, cancer, and neuronal disorders. It is interesting to note that beneficial effects appear more pronounced in the elderly than in younger adults despite the fact that aging is accompanied by increased oxidative stress that is suggested to be a major cause of aging and age-related diseases. Mechanisms behind this apparent paradox are not well understood. Regular training and acute bouts of exercise upregulate activities of antioxidant enzymes and thereby can reduce oxidative stress. We have studied the effects of regular exercise on oxidative stress in the liver and brain of middle-aged and old rats. Protein carbonyl was significantly reduced and proteasome activity was upregulated in the brain with improved cognitive function by swimming training. The binding of transcription factor NF-κB to the target DNA was reduced with concomitant increase of reduced glutathione in the liver of old rats by regular treadmill running, suggesting that inflammatory reactions are alleviated in these animals due to reduced oxidative stress. A similar exercise regimen was able to reduce 8-oxodeoxyguanosine (8-oxodG) in the nuclear and mitochondrial DNA of the liver of old rats. Based on these findings and reports by other investigators in which moderate exercise is suggested to be beneficial while excessive exercise is harmful, a hormesis-like mechanism by reactive oxygen species may be proposed that is likely to be a major mechanism of anti-aging effects and reduces risk of age-related diseases by regular exercise.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Exercise Science and Fitness
Volume5
Issue number1
Publication statusPublished - 2007 Jan 1
Externally publishedYes

Fingerprint

Oxidative Stress
Medicine
Exercise
Liver
Hormesis
Brain
Insurance Benefits
Proteasome Endopeptidase Complex
Mitochondrial DNA
Running
Type 2 Diabetes Mellitus
Cognition
Glutathione
Young Adult
Reactive Oxygen Species
Transcription Factors
Cardiovascular Diseases
Up-Regulation
Antioxidants
Research Personnel

Keywords

  • Aging
  • Hormesis
  • Oxidative stress
  • Regular exercise

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Public Health, Environmental and Occupational Health

Cite this

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