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KMID : 1025520060480030345
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Journal of Animal Science and Technology
2006 Volume.48 No. 3 p.345 ~ p.352
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Lipogenesis Gene Expression Profiling in Longissimus dorsi on the Early and Late Fattening Stage of Hanwoo
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Lee Seung-Hwan
Park Eung-Woo
Cho Yong-Min
Kim Kyoung-Hoon
Oh Young-Kyoon
Lee J.-H.
Lee Chang-Soo
Oh S.-J.
Yoon Du-Hak
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Abstract
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Korean native cattle (Hanwoo) have a good capacity to produce heavily marbled meat of high value. The intramuscular fat in Hanwoo is known to be deposit from 12 months of age by degree of slightly visible and significantly developed in 28 months of age. Lipogenesis gene expression profiling in longissimus dorsi at early and late fattening stage will be helpful to understand the mechanism of intramuscular fat deposition in skeletal muscle. Therefore, we analysed the gene expression patterns of six genes related lipid metabolism (FABP4, GLUT4, LPL, ACC, ACL and SCD) between early and late fattening stage. The mRNA expression of FABP4 at late fattening stage (27 months old) was higher about 3.0 fold than at early fattening stage (12 months old) in each three individuals of Hanwoo. However, GLUT4 mRNA expression was not different at late fattening stage compared with at early fattening stage. On the other hand, The expression patterns of LPL, ACC, ACL and SCD genes related lipid metabolism were significantly over-expressed about 3.5 fold, 2.7 fold, 3.7 fold and 7.5 fold at late fattening stage, respectively. Thus, these results suggested that lipogenesis in skeletal muscle at late fattening stage is due to increasing uptake of fatty acid by FABP4 and lipogenesis gene expression such as LPL, ACC, ACL and SCD.
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KEYWORD
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Longissimus dorsi, Early and Late fattening stage, Lipid metabolism, Gene expression
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