Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Low Lysine Treatment Increases Adipogenic Potential of Bovine Intramuscular Preadipocytes

  • Beloor, Jagadish (Department of Animal Science & Biotechnology, Jinju National University) ;
  • Kang, Hye Kyeong (Department of Animal Science & Biotechnology, Jinju National University) ;
  • Yun, Cheol-Heui (Department of Agricultural Biotechnology and Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Kim, Sang Hoon (Department of Biology, Kyung Hee University) ;
  • Moon, Yang Soo (Department of Animal Science & Biotechnology, Jinju National University)
  • Received : 2009.01.16
  • Accepted : 2009.03.22
  • Published : 2009.05.01
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Abstract

The molecular mechanism of adipocyte differentiation has been well documented. However, the effect of specific nutrients such as lysine on adipocyte differentiation is poorly understood especially in ruminant animals. Therefore, the aim of the present study was to elucidate the influence of lysine on adipocyte differentiation and adipogenic genes in cultured bovine preadipocytes. The preadipocytes were treated with different concentrations of lysine (40, 160, 320 mg/L) or troglitazone (10 ${\mu}M$) for 2 days and then subsequently cultured in differentiation medium until day 6. Expression levels of $C/EBP{\alpha}$ were significantly higher (p<0.001) in 40 and 160 mg/L lysine-treated cells compared to 320 mg/L treatment. Though there was an increasing trend in $PPAR{\gamma}$ expression levels with the decreasing lysine concentration, the results were not significant. The preadipocyte factor (pref-1), expression significantly (p<0.001) reduced with decreasing lysine concentration. The Oil red O staining results were better in 40 mg/L treated cells compared to 160 and 320 mg/L lysine treated cells. Our overall results indicate that insufficient supply of lysine increases the adipogenic potential in bovine intramuscular preadipocytes.

Keywords

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