title: Selenium regulates gene expression of selenoprotein W in chicken skeletal muscle system.
abstract: Selenoprotein W (SelW) is abundantly expressed in skeletal muscles of mammals and necessary for the metabolism of skeletal muscles. However, its expression pattern in skeletal muscle system of birds is still uncovered. Herein, to investigate the distribution of SelW mRNA in chicken skeletal muscle system and its response to different selenium (Se) status, 1-day-old chickens were exposed to various concentrations of Se as sodium selenite in the feed for 35 days. In addition, myoblasts were treated with different concentrations of Se in the medium for 72 h. Then the levels of SelW mRNA in skeletal muscles (wing muscle, pectoral muscle, thigh muscle) and myoblasts were determined on days 1, 15, 25, and 35 and at 0, 24, 48, and 72 h, respectively. The results showed that SelW was detected in all these muscle components and it increased both along with the growth of organism and the differentiation process of myoblasts. The thigh muscle is more responsive to Se intake than the other two skeletal muscle tissues while the optimal Se supplementation for SelW mRNA expression in chicken myoblasts was 10(-7) M. In summary, Se plays important roles in the development of chicken skeletal muscles. To effect optimal SelW gene expression, Se must be provided in the diet and the media in adequate amounts and neither at excessive nor deficient levels.
authors.affiliation: College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, People's Republic of China. benjimmy33108@yahoo.cn
authors.forename: Hongfeng
authors.initials: H
authors.lastname: Ruan
authors.forename: Ziwei
authors.initials: Z
authors.lastname: Zhang
authors.forename: Qiong
authors.initials: Q
authors.lastname: Wu
authors.forename: Haidong
authors.initials: H
authors.lastname: Yao
authors.forename: Jinlong
authors.initials: J
authors.lastname: Li
authors.forename: Shu
authors.initials: S
authors.lastname: Li
authors.forename: Shiwen
authors.initials: S
authors.lastname: Xu
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D030161:Avian Proteins / Q000235:genetics*; D002478:Cells, Cultured; D002645:Chickens; D019587:Dietary Supplements; D015870:Gene Expression / Q000187:drug effects*; D018482:Muscle, Skeletal / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D032446:Myoblasts / Q000187:drug effects / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D011897:Random Allocation; D020133:Reverse Transcriptase Polymerase Chain Reaction; D051151:Selenoprotein W / Q000235:genetics*; D018038:Sodium Selenite / Q000008:administration & dosage / Q000494:pharmacology*; D013997:Time Factors
chemical_list: D030161:Avian Proteins; D012333:RNA, Messenger; D051151:Selenoprotein W; D018038:Sodium Selenite