Comparison of different forms of dietary selenium supplementation on gene expression of cytoplasmic thioredoxin reductase, selenoprotein P, and selenoprotein W in broilers

X.A. Zhan, H.F. Wang, D. Yuan, Y.X. Wang and F. Zhu
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X.A. Zhan: College of Animal Science and Technology, Zhejiang A and F University, Linan, P.R. China
H.F. Wang: College of Animal Science and Technology, Zhejiang A and F University, Linan, P.R. China
D. Yuan: Feed Science Institute, College of Animal Science, Zhejiang University, Hangzhou, P.R. China
Y.X. Wang: College of Animal Science and Technology, Zhejiang A and F University, Linan, P.R. China
F. Zhu: College of Animal Science and Technology, Zhejiang A and F University, Linan, P.R. China

Czech Journal of Animal Science, 2014, vol. 59, issue 12, 571-578

Abstract: Effects of different forms of dietary selenium (Se) supplementation on gene expression of cytoplasmic thioredoxin reductase (TrxR1), selenoprotein P (SelP), and selenoprotein W (SelW) in broilers were investigated. A total of six hundred Ross 308 broilers (1-day-old) with similar body weight were randomly divided into three groups, each of which included 5 replicates of 40 birds. These three treatments received the same basal diet with only background Se level of 0.04 mg Se/kg, supplemented with 0.15 mg Se/kg as sodium selenite (SS) or l-selenomethionine (l-Se-Met) or d-selenomethionine (d-Se-Met) for 42 days. The SS supplemented diet increased TrxR1 activity in liver (P < 0.01) and kidney (P < 0.01) as well as SelP concentration in serum (P < 0.05) and liver (P < 0.01) more than the d-Se-Met supplemented diet. The addition of SS also highly increased liver (P < 0.01) and kidney (P < 0.01) TrxR1 activities of broilers in comparison with broilers fed l-Se-Met diet. In addition, liver TrxR1 activity in l-Se-Met group was higher than that in d-Se-Met group (P < 0.05). Liver and kidney mRNA levels of TrxR1 and SelP as well as breast muscle SelW mRNA level were significantly increased by l- and d-Se-Met supplementation in comparison with SS supplementation (P < 0.01), while the d-Se-Met group showed more effective (P < 0.01) than the l-Se-Met group in increasing the mRNA levels of TrxR1 and SelP in liver and kidney. Therefore, dietary l-Se-Met and d-Se-Met supplementation could improve mRNA levels of different selenoproteins studied and reduce amounts of TrxR1 and SelP in broilers compared with SS. Besides, l-Se-Met is more effective than d-Se-Met in raising TrxR1 activity and decreasing mRNA abundance of TrxR1 and SelP in broilers.

Keywords: sodium selenite; l-selenomethionine; d-selenomethionine; nRNA abundance (search for similar items in EconPapers)
Date: 2014
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DOI: 10.17221/7797-CJAS

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