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PLoS One


Title:"Differences in Circulating microRNAs between Grazing and Grain-Fed Wagyu Cattle Are Associated with Altered Expression of Intramuscular microRNA, the Potential Target PTEN, and Lipogenic Genes"
Author(s):Muroya S; Shibata M; Hayashi M; Oe M; Ojima K;
Address:"Animal Products Research Division, NARO Institute of Livestock and Grassland Science, Tsukuba, Ibaraki, Japan. Livestock Production and Wildlife Management Research Division, NARO Western Region Agricultural Center, Ohda, Shimane, Japan. Animal Physiology and Nutrition Research Division, NARO Institute of Livestock and Grassland Science, Tsukuba, Ibaraki, Japan"
Journal Title:PLoS One
Year:2016
Volume:20160909
Issue:9
Page Number:e0162496 -
DOI: 10.1371/journal.pone.0162496
ISSN/ISBN:1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:"We aimed to understand the roles of miRNAs in the muscle tissue maturation and those of circulating microRNAs (c-miRNAs) in beef production of Japanese Black (JB) cattle (Wagyu), a breed with genetically background of superior intermuscular fat depot, by comparing different feeding conditions (indoor grain-feeding vs. grazing on pasture). The cattle at 18 months old were assigned to pasture feeding or conventional indoor grain feeding conditions for 5 months. Microarray analysis of c-miRNAs from the plasma extracellular vesicles led to the detection of a total of 202 bovine miRNAs in the plasma, including 15 miRNAs that differed between the feeding conditions. Validation of the microarray results by qPCR showed that the circulating miR-10b level in the grazing cattle was upregulated compared to that of the grain-fed cattle. In contrast, the levels of miR-17-5p, miR-19b, miR-29b, miR-30b-5p, miR-98, miR-142-5p, miR-301a, miR-374b, miR-425-5p, and miR-652 were lower in the grazing cattle than in the grain-fed cattle. Bioinformatic analysis indicated that the predicted target genes of those c-miRNAs were enriched in gene ontology terms associated with blood vessel morphogenesis, plasma membrane, focal adhesion, endocytosis, collagen, ECM-receptor interaction, and phosphorylation. In the grazing cattle, the elevation of miR-10b expression in the plasma was coincident with its elevation in the longissimus lumborum (LL) muscle. Expression of bovine-specific miR-2478, the most plasma-enriched miRNA, tended to be also upregulated in the muscle but not in the plasma. Furthermore, grazing caused the downregulated mRNA expression of predicted miR-10b and/or miR-2478 target genes, such as DNAJB2, PTEN, and SCD1. Thus, the feeding system used for JB cattle affected the c-miRNAs that could be indicators of grain feeding. Among these, miR-10b expression was especially associated with feeding-induced changes and with the expression of the potential target genes responsible for glucose homeostasis and intramuscular fat depot in the LL muscle of JB cattle"
Keywords:Animals Cattle Computational Biology Gene Expression Profiling HSP40 Heat-Shock Proteins/genetics Herbivory Lipogenesis/genetics/physiology MicroRNAs/*genetics PTEN Phosphohydrolase/genetics Stearoyl-CoA Desaturase/genetics;
Notes:"MedlineMuroya, Susumu Shibata, Masahiro Hayashi, Masayuki Oe, Mika Ojima, Koichi eng 2016/09/10 PLoS One. 2016 Sep 9; 11(9):e0162496. doi: 10.1371/journal.pone.0162496. eCollection 2016"

 
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