Cellular conditions for intramuscular fat deposition in Japanese Black and Holstein steers

被引：100

作者：

Albrecht, E. ^{[1
]}

Gotoh, T. ^{[2
]}

Ebara, F. ^{[2
]}

Xu, J. X. ^{[1
]}

Viergutz, T. ^{[1
]}

Nuernberg, G. ^{[1
]}

Maak, S. ^{[1
]}

Wegner, J. ^{[1
]}

机构：

[1] Leibniz Inst Farm Anim Biol, D-18196 Dummerstorf, Germany

[2] Kyushu Univ, Kuju Agr Res Ctr, Kuju, Oita 8780201, Japan

来源：

MEAT SCIENCE | 2011年 / 89卷 / 01期

关键词：

Adipocyte; Beef; Fatty acid binding protein 4; Marbling; Muscle structure gamma; Peroxisome proliferator-activated receptor; PROLIFERATOR-ACTIVATED RECEPTOR; BREED-RELATED CHANGES; ENZYME-ACTIVITIES; ADIPOSE-TISSUES; MUSCLE-TISSUE; GROWTH; CATTLE; ADIPOCYTES; EXPRESSION; DEPOTS;

D O I：

10.1016/j.meatsci.2011.03.012

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

The experiment was conducted to study the development of intramuscular fat in Japanese Black (JB) compared to Holstein (HS) steers and to find breed differences for fat depot development and distribution in the carcass under equal feeding conditions. Additional to slaughter samples, biopsy samples of longissimus muscle (LM) and subcutaneous fat, taken at 10, 14, 18, and 22 months of age, were used for histological and molecular investigations. Japanese Black steers stored about 14% more fat in the LM (P=0.001), resulting in larger marbling flecks (P<0.001). Muscle fibers and intramuscular adipocytes in both breeds responded to the high energy feeding with significant enlargement, which was faster in JB. Histograms of intramuscular adipocytes size showed a shift toward larger cells during growth, but also the abundance of small, developing adipocytes. This development was accompanied by a correlated up-regulation of adipogenic genes until 22 months of age. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：13 / 20

页数：8

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