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${\alpha}$-Lipoic acid reduced weight gain and improved the lipid profile in rats fed with high fat diet

  • Seo, Eun-Young (Department of Food Science and Nutrition, Dankook University) ;
  • Ha, Ae-Wha (Department of Food Science and Nutrition, Dankook University) ;
  • Kim, Woo-Kyoung (Department of Food Science and Nutrition, Dankook University)
  • Received : 2012.03.09
  • Accepted : 2012.04.17
  • Published : 2012.06.30

Abstract

The purpose of this study was to investigate the effects of ${\alpha}$-lipoic acid on body weight and lipid profiles in Sprague-Dawley rats fed a high fat diet (HFD). After 4 weeks of feeding, rats on the HFD were divided into three groups by randomized block design; the first group received the high-fat-diet (n = 10), and the second group received the HFD administered with 0.25% ${\alpha}$-lipoic acid (0.25LA), and the third group received the high-fat diet with 0.5% ${\alpha}$-lipoic acid (0.5LA). The high fat diet with ${\alpha}$-lipoic acid supplemented groups had significantly inhibited body weight gain, compared to that in the HFD group (P < 0.05). Organ weights of rats were also significantly reduced in liver, kidney, spleen, and visible fat tissues in rats supplemented with ${\alpha}$-lipoic acid (P < 0.05). Significant differences in plasma lipid profiles, such as total lipids, total cholesterol, triglycerides, low-density lipoprotein, and high-density lipoprotein, were observed between the HFD and 0.5LA groups. The atherogenic index and the plasma high density lipoprotein-cholesterol/total cholesterol ratio improved significantly with ${\alpha}$-lipoic acid supplementation in a dose-dependent manner (P < 0.05). Total hepatic cholesterol and total lipid concentration decreased significantly in high fat fed rats supplemented with ${\alpha}$-lipoic acid in a dose-dependent manner (P < 0.05), whereas liver triglyceride content was not affected. In conclusion, ${\alpha}$-lipoic acid supplementation had a positive effect on weight gain and plasma and liver lipid profiles in rats.

Acknowledgement

Supported by : Korea Science and Engineering Foundation(KOSEF)

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