Nutrition Research and Practice

The Korean Nutrition Society (한국영양학회)
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Changes in lipid and carnitine concentrations following repeated fasting-refeeding in mice

  • Kang, Se-Wha (Department of Food Science and Human Nutrition, Research Institute of Human Ecology, Jeonbuk National University) ;
  • Ahn, Eun-Mi (Department of Food Science and Human Nutrition, Research Institute of Human Ecology, Jeonbuk National University) ;
  • Cha, Youn-Soo (Department of Food Science and Human Nutrition, Research Institute of Human Ecology, Jeonbuk National University)
  • Received : 2010.05.18
  • Accepted : 2010.10.20
  • Published : 2010.12.31
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Abstract

The purpose of this study was to evaluate the effects of repeated fasting and refeeding on lipid metabolism. Thirty male ICR mice, aged 6 weeks, were fed an AIN-93 control diet during the experimental period. The mice were divided into 5 groups: Non fasting group (ad libitum-fed, NF), fasting for 3 days (F), fasting for 3 days and then refeeding for 4 days repeated once (FRF1), fasting for 3 days and then refeeding for 4 days repeated twice (FRF2), and fasting for 3 days and then refeeding for 4 days repeated three times (FRF3). Rates of body weight gain, epididymal fat weight, and serum TG were significantly decreased in the F, FRF1, FRF2, and FRF3 groups, compared to the NF group. LDL-cholesterol was significantly higher in the FRF3 group than the NF and F groups, but HDL-cholesterol and HDL/TC were significantly lower in the FRF3 group than in the NF and F groups. Serum total carnitine was significantly lower in the FRF1, FRF2, FRF3 groups than the NF and F groups. However, rates of serum and hepatic acyl-carnitine concentration were significantly lower in FRF1, FRF2, and FRF3 than in NF and F. Repeated tasting-refeeding resulted in visible reductions of body weight and fat mass, but it caused ill-effects with lipid and carnitine metabolism in the body.

Keywords

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