Pronounced effects of acute endurance exercise on gene expression in resting and exercising human skeletal muscle

PLoS One. 2012;7(11):e51066. doi: 10.1371/journal.pone.0051066. Epub 2012 Nov 30.

Abstract

Regular physical activity positively influences whole body energy metabolism and substrate handling in exercising muscle. While it is recognized that the effects of exercise extend beyond exercising muscle, it is unclear to what extent exercise impacts non-exercising muscles. Here we investigated the effects of an acute endurance exercise bouts on gene expression in exercising and non-exercising human muscle. To that end, 12 male subjects aged 44-56 performed one hour of one-legged cycling at 50% W(max). Muscle biopsies were taken from the exercising and non-exercising leg before and immediately after exercise and analyzed by microarray. One-legged cycling raised plasma lactate, free fatty acids, cortisol, noradrenalin, and adrenalin levels. Surprisingly, acute endurance exercise not only caused pronounced gene expression changes in exercising muscle but also in non-exercising muscle. In the exercising leg the three most highly induced genes were all part of the NR4A family. Remarkably, many genes induced in non-exercising muscle were PPAR targets or related to PPAR signalling, including PDK4, ANGPTL4 and SLC22A5. Pathway analysis confirmed this finding. In conclusion, our data indicate that acute endurance exercise elicits pronounced changes in gene expression in non-exercising muscle, which are likely mediated by changes in circulating factors such as free fatty acids. The study points to a major influence of exercise beyond the contracting muscle.

Publication types

  • Clinical Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Exercise / physiology*
  • Fatty Acids, Nonesterified / blood
  • Gene Expression Regulation*
  • Gene Regulatory Networks / genetics
  • Heart Rate / physiology
  • Humans
  • Hydrocortisone / blood
  • Insulin / blood
  • Leg / physiology
  • Male
  • Middle Aged
  • Muscle, Skeletal / metabolism*
  • Norepinephrine / blood
  • Physical Endurance / genetics*
  • Rest / physiology*
  • Transcription Factors / metabolism
  • Up-Regulation / genetics

Substances

  • Fatty Acids, Nonesterified
  • Insulin
  • Transcription Factors
  • Hydrocortisone
  • Norepinephrine

Grant support

The study was funded by the Dutch Diabetes Foundation (grant # 2009.60.003; http://www.diabetesfonds.nl/) and the Netherlands Nutrigenomics Centre (http://www.netherlandsnutrigenomicscentre.nl). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.