alexa Influence of Housing Density and Grazing on Heat Shock Protein 27 Expression in Skeletal Muscle of Beef Cattle
ISSN: 2332-2608

Journal of Fisheries & Livestock Production
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Research Article

Influence of Housing Density and Grazing on Heat Shock Protein 27 Expression in Skeletal Muscle of Beef Cattle

Masahiro Shibata*, Yasuko Hikino, Kazunori Matsumoto and Naoyuki Yamamoto

Livestock Production and Wildlife Management Research Division, NARO Western Region Agricultural Research Center, Ohda, Shimane 694-0013, Japan

*Corresponding Author:
Masahiro Shibata
Livestock Production and Wildlife Management Research Division
NARO Western Region Agricultural Research Center
Ohda, Shimane 694-0013, Japan
Tel: +81-854-82-0144
Fax: +81-854-82-2280
E-mail: [email protected]

Received Date: August 05, 2014; Accepted Date: September 01, 2014; Published Date: September 06, 2014

Citation: Shibata M, Hikino Y, Matsumoto K, Yamamoto N (2014) Influence of Housing Density and Grazing on Heat Shock Protein 27 Expression in Skeletal Muscle of Beef Cattle. J Fisheries Livest Prod 2:117. doi: 10.4172/2332-2608.1000117

Copyright: © 2014 Shibata M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

Heat shock proteins (HSPs) are used as a stress biomarker in several studies as well as other stress biomarker, but the influence of different rearing environment on HSPs expression with other stress biomarker in cattle is unclear. To clear this point, two experiments were conducted to investigate the influence of rearing environment on HSP 27 in steer muscle. In experiment 1, 10 Japanese black steers were divided into 2 groups for a housing density stress experiment: a high-density (HD) group and freedom (FR) group. IgG levels and the neutrophil-to-lymphocyte (N/L) ratio in blood was analyzed as a stress marker. IgG levels and N/L ratios in the HD group were higher than those in the FR group. HSP 27 expression in the semitendinosus (ST) muscle of the HD group was higher than that of the FR group. These results suggest that HSP 27 expression may reflect the influence of the stress response with IgG levels and N/L ratios. In experiment 2, 8 Japanese Black steers were divided into 2 groups for a feeding experiment: a grazing (GR) group and concentrate-fed (CT) group. Blood IgG levels in the GR group after grazing were lower than those in the CT group. Expressions of the HSP 27 gene and its protein in the GR group were decreased in the longissimus lumborum and ST muscles compared with those in the CT group at the end of grazing. HSP 27 gene expression in the ST muscle of the GR group was lower after grazing than before grazing, but there was no significant difference in its expression in the CT group before and after grazing. The present study suggests that HSP 27 probably reflects not only differences in the rearing systems, but also the influence of the stress reaction.

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