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

研究成果: Article

19 引用 (Scopus)

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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.

元の言語English
ページ(範囲)697-705
ページ数9
ジャーナルFree Radical Research
43
発行部数8
DOI
出版物ステータスPublished - 2009 7 28

ASJC Scopus subject areas

  • Biochemistry

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    Kinnunen, S., Oksala, N., Hyyppä, S., Sen, C. K., Radak, Z., Laaksonen, D. E., Szabó, B., Jakus, J., & Atalay, M. (2009). α-Lipoic acid modulates thiol antioxidant defences and attenuates exercise-induced oxidative stress in standardbred trotters. Free Radical Research, 43(8), 697-705. https://doi.org/10.1080/10715760903037673