Effects of exercise and antioxidant supplementation on endothelial gene expression

Aya Matsumoto, Steven R. Mason, Traute Flatscher-Bader, Leigh C. Ward, Susan A. Marsh, Peter A. Wilce, Robert G. Fassett, Judy B. De Haan, Jeff S. Coombes

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)

Abstract

Background: The molecular mechanisms of exercise training induced cardiovascular protection are poorly understood. There is growing evidence that reactive oxygen species may be involved in a number of these adaptations and that antioxidants may be used to investigate this effect. Objective: To determine the effects of exercise training and/or antioxidant supplementation on myocardial endothelium and vascular endothelium gene expression. Methods: Male Wistar rats were divided into four groups: i) control; ii) exercise trained (90 min of treadmill running 4d per week, 14 weeks); iii) antioxidant-supplemented (α-tocopherol 1000 IU kg - 1 diet and α-lipoic acid 1.6 g kg - 1 diet, mixed with rat chow) and iv) exercise trained and antioxidant-supplemented. Results: cDNA microarray analysis showed diverse expression changes in both left ventricular and coronary artery endothelial cells. In particular, RT-PCR analysis showed that a gene involved in cardiovascular disease progression, Ras homolog gene family member A, was down-regulated by exercise, and up-regulated by antioxidant supplementation in left ventricular endothelial cells. Furthermore, an important gene involved in inflammation, IL-6, was down-regulated by all treatments. Conclusions: Exercise training and/or antioxidant supplementation affects cardiac endothelial cell gene expression, and their effects on genes such as ras homolog gene family member A and IL-6 provides insight into the molecular mechanisms of their influences on cardiovascular diseases.

Original languageEnglish
Pages (from-to)59-65
Number of pages7
JournalInternational Journal of Cardiology
Volume158
Issue number1
DOIs
Publication statusPublished - 28 Jun 2012
Externally publishedYes

Keywords

  • Antioxidants
  • Endothelial cells
  • Exercise
  • Gene expression
  • IL-6
  • RhoA

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