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http://dx.doi.org/10.5713/ajas.2007.1587

Effects of Dietary Energy Density on Growth, Carcass Quality and mRNA Expression of Fatty Acid Synthase and Hormone-sensitive Lipase in Finishing Pigs  

Liu, Z.H. (Chongqing Academy of Animal Science)
Yang, F.Y. (Chongqing Academy of Animal Science)
Kong, L.J. (College of Animal Science and Technology, China Agricultural University)
Lai, C.H. (College of Animal Science and Technology, China Agricultural University)
Piao, X.S. (College of Animal Science and Technology, China Agricultural University)
Gu, Y.H. (Chongqing Academy of Animal Science)
Ou, X.Q. (Chongqing Academy of Animal Science)
Publication Information
Asian-Australasian Journal of Animal Sciences / v.20, no.10, 2007 , pp. 1587-1593 More about this Journal
Abstract
A single factorial experiment was conducted to test the effects of three dietary levels of energy on mRNA expression of fatty acid synthase (FAS-mRNA) and hormone-sensitive lipase (HSL-mRNA) and their association with intramuscular fat in finishing pigs. 72 crossbred (Large $White{\times}Rongchang$) barrows with an average initial body weight of 20.71 (s.e. 0.1) kg, were randomly allotted to three dietary treatments (11.75, 13.05 and 14.36 MJ DE/kg) and fed until slaughtered at 100 or 101 kg. The diets were iso-nitrogenous and iso-essential amino acids. The growth performances including the duration of finishing were changed linearly (p<0.05) or quadratically (p<0.05) with increased dietary energy levels. The effects of dietary energy content on the percentage of external fat, intramuscular backfat and the fat thickness were linear (p<0.05). The content of dietary energy increased FAS-mRNA linearly or quadratically, while HSL-mRNA decreased linearly or quadratically in backfat and Longissmus dorsi muscle. Meanwhile, significant positive correlations (p<0.05) were found between energy level and intramuscular fat, FAS-mRNA or the ratio of FAS-mRNA to HSL-mRNA, between the ratio of FAS-mRNA to HSL-mRNA and intramuscular fat. However, the correlations between HSL mRNA and dietary energy or intramuscular fat were negative (p<0.05). The results indicated that dietary energy level regulates lipid accumulation, especially intramuscular fat, possibly by modulating the mRNA of FAS and HSL together rather than individually.
Keywords
Energy; Fatty Acid Synthase; Hormone-sensitive Lipase; Carcass Quality; Finishing Pigs;
Citations & Related Records
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Times Cited By Web Of Science : 3  (Related Records In Web of Science)
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