Fatty acid profiles and adipogenic gene expression of various fat depots in Japanese Black and Holstein steers
Fatty acid profiles and adipogenic gene expression of various fat depots in Japanese Black and Holstein steers
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DOI：
10.1016/j.meatsci.2013.06.027
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发表时间：
2014-01-01
期刊：
影响因子：
7.1
通讯作者：
Nuernberg, Karin
中科院分区：
文献类型：
--
作者：
Shirouchi, Bungo;Albrecht, Elke;Nuernberg, Karin
本研究旨在探讨不同品种对不同脂肪组织脂肪酸组成的影响，以及对脂肪形成和脂肪代谢相关基因表达的影响。日本黑牛(JB)和荷斯坦牛(HS)在同等条件下高能量摄入，导致最长肌(LM)肌内脂肪(IMF)积累差异较大。肌肉、肌间脂肪、内脏脂肪和肾周脂肪的相对脂肪酸组成在JB牛和HS牛之间相当。循环脂肪酸在两个品种中也是相似的。在国际货币基金组织中确定了最相关的品种效应，强调了这个脂肪组织部位的独特性。JB牛的单不饱和脂肪酸含量较高，饱和脂肪酸含量较低。JB的IMF中Perilipin 1和脂肪分化相关蛋白(ADFP)的mRNA水平较高。结果表明，JB内IMF细胞的提前成熟和肌肉局部条件的改变影响了IMF的积累和组成。(C)2013爱思唯尔有限公司。保留所有权利。
Objective of the study was to assess the breed effect on fatty acid (FA) composition of different adipose tissues and on mRNA expression of genes involved in adipogenesis and fat metabolism. Japanese Black (JB) and Holstein (HS) steers were kept under equivalent conditions with high energy intake resulting in large differences in intramuscular fat (IMF) accumulation in longissimus muscle (LM). The relative FA composition of muscle, intermuscular fat, visceral fat, and perirenal fat was comparable between JB and HS steers. Circulating fatty acids were also similar in both breeds. Most relevant breed effects were identified in IMF, underlining the uniqueness of this adipose tissue site. JB steers had more monounsaturated FA and less saturated FA. Perilipin 1 and adipose differentiation-related protein (ADFP) mRNA levels were higher in IMF of JB. The results suggest advanced maturity of IMF cells in JB and altered local conditions in muscle influencing IMF accumulation and composition. (C) 2013 Elsevier Ltd. All rights reserved.