α-Lipoic acid modulates thiol antioxidant defences and attenuates exercise-induced oxidative stress in standardbred trotters

Susanna Kinnunen, Niku Oksala, Seppo Hyyppä, Chandan K. Sen, Zsolt Radak, David E. Laaksonen, Bernadett Szabó, Judit Jakus, Mustafa Atalay

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Several micronutrient supplementation strategies are used to cope with oxidative stress, although their benefits have recently been questioned. The aim of the present study was to examine the effects of DL-α-lipoic acid (LA) in response to acute exercise and during recovery in horses. Six standardbred trotters were tested on the treadmill before and after 5-week LA supplementation (25 mg/kg body weight/day). According to electron paramagnetic resonance measurements, strenuous aerobic exercise increased significantly free radical formation in the gluteus medius muscle, which was prevented by LA supplementation. The activities of thioredoxin reductase and glutathione reductase in muscle were significantly increased in LA-treated horses, but neither LA nor exercise affected muscle thioredoxin activity. LA increased the concentration of total glutathione in muscle at rest and during recovery. Treatment with LA blunted the exercise-induced increase in plasma oxygen radical absorbance capacity and decreased the post-exercise levels of lipid hydroperoxides in plasma and malondialdehyde in plasma and in muscle. These findings suggest that LA enhances thiol antioxidant defences and decreases exercise-induced oxidative stress in skeletal muscle.

Original languageEnglish
Pages (from-to)697-705
Number of pages9
JournalFree radical research
Volume43
Issue number8
DOIs
Publication statusPublished - Jul 28 2009

Keywords

  • Exercise
  • Horse
  • Lipid peroxidation
  • Redox balance
  • Thiols

ASJC Scopus subject areas

  • Biochemistry

Fingerprint Dive into the research topics of 'α-Lipoic acid modulates thiol antioxidant defences and attenuates exercise-induced oxidative stress in standardbred trotters'. Together they form a unique fingerprint.

  • Cite this