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《Chinese Journal of Animal Science》 2011-15
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Effects of Tea Polyphenol on Growth Performance and Immune Function of Weaned Piglets Challenged with Oxidative Stress

LI Yong-yi,DUAN Xu-dong,ZHAO Jiao,YU Bing,MAO Xiang-bing,MAO Qian,CHEN Hong,CHEN Dai-wen (Animal Disease-Resistance Nutrition Key Laboratory of Sichuan Province, Institute of Animal Nutrition,Sichuan Agricultural University,Sichuan Ya′an 625014,China)  
This experiment was conducted to study the effect of dietary tea polyphenol(TP) on growth performance and immune function of weaned piglets challenged with oxidative stress caused by diquat.Thirty-six 28-day-old piglets were randomly allotted into three groups with 12 piglets each.Piglets in three treatments were firstly fed with basal diet supplemented with 0,500 and 1000 mg/kg TP for 14 days,respectively,and then half of the piglets in each group were challenged with diquat(10 mg/kg BW) while the others were injected with physiological saline in the same volume followed with feeding the same diet for the other 7 days.The results showed that injection of diquat significantly impaired the growth performance of piglets for the decreased the ADG and ADFI as well as increased F/G(P0.01),while supplementing TP alleviated the negative effects of diquat on growth performance(P0.01 or P0.05).In addition,the TP supplementation prevented the reduction of blood CD4+ and CD4+/CD8+ ratio,serum IgA,IgG,,IgM and IL-4 levels as well as the elevation of serum INF-γinduced by diquat challenging(P0.01,P0.05 and P0.05,respectively).However,the TP addition didn't back the higher blood CD8+ and serum IL-2 to normal contents(P0.01 and P0.05).In conclusion,the impaired growth performance and immune functions of weaned piglets caused by oxidative stress can be alleviated by TP supplementation.
【Fund】: 现代农业产业技术体系建设专项资金(CARS-36)
【CateGory Index】: S828.5
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