Effects of selenium form on blood and milk selenium concentrations, milk component and milk fatty acid composition in dairy cows
Effects of selenium form on blood and milk selenium concentrations, milk component and milk fatty acid composition in dairy cows
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硒形态对奶牛血液和乳汁硒浓度、乳成分和乳脂肪酸组成的影响
DOI：
10.1002/jsfa.4073
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发表时间：
2010-10-01
影响因子：
4.1
通讯作者：
Huang, Kehe
中科院分区：
文献类型：
--
作者：
Ran, Linwu;Wu, Xianshi;Huang, Kehe
背景：如果摄入具有良好脂肪酸组成和硒浓度的牛奶，可以改善人体健康。本研究旨在探讨基础日粮中添加富硒酵母（SY）或亚硒酸钠（SS）5 mg硒对牛乳脂肪酸组成和硒含量的影响。研究了硒形态对血硒浓度、红细胞谷胱甘肽过氧化物酶1（GPx 1）活性、血清GPx 3活性及产奶量和乳成分的影响。与对照组相比，两种硒形式均增加血硒浓度（P < 0.01）和牛奶（P < 0.01），红细胞GPx 1活性多不饱和脂肪酸（PUFA）和顺式9、顺式12亚油酸（cis-9，cis-12 linoleic acid，C12）含量显著高于对照组（P < 0.05）。添加SY的奶牛血硒和乳硒含量显著高于添加SS的奶牛（P <0.01），乳中PUFA含量显著高于添加SS的奶牛（P < 0.05）。产奶量、乳成分和血清GPx 3活性均不受Se形态的影响。结论：在日粮中添加SY比SS更有利于生产高PUFA和Se含量的优质乳。(C)2010年化学工业协会
BACKGROUND: Human health may be improved if milk with a favorable fatty acid composition and Se concentration is ingested. The present study is to determine how a basal diet supplemented with daily 5 mg Se as Se-enriched yeast (SY) or sodium selenite (SS) affects the fatty acid composition and Se concentration of bovine milk. The effects of Se form on blood Se concentration, erythrocyte glutathione peroxidase 1 (GPx1) activity, serum GPx3 activity and milk yield and component were also studied.RESULTS: Both Se forms, when compared to control group, increased Se concentrations of blood (P < 0.01) and milk (P < 0.01), erythrocyte GPx1 activity (P < 0.05) and milk percentages of polyunsaturated fatty acids (PUFA) (P < 0.05) and cis-9, cis-12 linoleic acid (P < 0.05). Cows supplemented with SY had higher Se levels in blood (P < 0.01) and milk (P < 0.01) and percentage of PUFA in milk (P < 0.05) when compared with those supplemented with SS. Milk yield, milk component and serum GPx3 activity were not significantly affected by Se form.CONCLUSION: Supplementation of diet with SY appears to be of more benefit than SS in producing favorable milk with high PUFA and Se concentrations. (C) 2010 Society of Chemical Industry