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Relative bioavailability of selenium yeast for broilers fed a conventional corn-soybean meal diet

文献类型： 外文期刊

作者： Liu, Guoqing 1 ; Zhao, Yuzhen 1 ; Cao, Sumei 1 ; Wang, Runlian 2 ; Zhang, Liyang 1 ; Lu, Lin 1 ; Liao, Xiudong 1 ; Luo, X 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Anim Sci, Mineral Nutr Res Div, Beijing 100193, Peoples R China

2.Guangdong Ocean Univ, Dept Anim Sci, Zhanjiang, Peoples R China

关键词： bioavailability; broiler; glutathione peroxidase expression; selenium concentration; selenium yeast

期刊名称：JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION （ 影响因子：2.13； 五年影响因子：2.322 ）

ISSN： 0931-2439

年卷期：

页码：

收录情况： SCI

摘要： The present study was conducted to assess the relative bioavailability of selenium (Se) as Se yeast (SY) relative to sodium selenite (SS) for broilers fed a conventional corn-soybean meal diet. A total of 360 one-d-old Arbor Acres commercial broilers were randomly assigned to 5 treatments with 6 replicates per treatment in a completely randomized design involving a 2 (Se sources: SY and SS) x 2 (added Se levels: 0.20 and 0.40 mg Se/kg) factorial design of treatments plus 1 (a Se-unsupplemented control diet) for 42 days. The results showed that Se concentrations in plasma, liver, heart, breast muscle, pancreas and kidney of broilers on d 21 and 42, glutathione peroxidase (GSH-Px) activity in the pancreas on d 21 as well as in the breast muscle and pancreas on d 42, and GSH-Px mRNA levels in the liver, heart, breast muscle and pancreas on d 21 increased linearly (p < .03) as levels of added Se increased. Furthermore, a difference (p <= .05) between SY and SS was detected for Se concentrations in plasma, liver, heart, breast muscle, pancreas and kidney, GSH-Px activity in pancreas on both d 21 and 42, as well as pancreatic GSH-Px mRNA level on d 21. Based on slope ratios from the multiple linear regressions of the above indices, the Se bioavailabilities of SY relative to SS (100%) were 111%-394% (p <= .05) when calculated from the Se concentrations in plasma, liver, heart, breast muscle, pancreas, kidney and GSH-Px activities in pancreas on d 21 and 42, as well as GSH-Px mRNA level in pancreas on d 21. The results from this study indicated that the Se from SY was more available for enhancing the Se concentrations in plasma or tissues and the expression and activity of GSH-Px in pancreas of broilers than the Se from SS.

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