Alterations on vitamin C synthesis and transportation and egg deposition induced by dietary vitamin C supplementation in Hy-Line Brown layer model  

作　　者：Yufei Zhu Wei Guo Jianfei Zhao Kailong Qin Jiakun Yan Xinhuo Huang Zhouzheng Ren Xin Yang Yanli Liu Xiaojun Yang 

机构地区：[1]College of Animal Science and Technology,Northwest A&F University,Yangling,China [2]Nano Vitamin Engineering Research Center of Shannxi Province,Xi'an,China

出　　处：《Animal Nutrition》2021年第4期973-980,共8页动物营养（英文版）

基　　金：funded by the National Key Research and Development Program of China(2017YFD0500500,20170502200);the National Natural Science Foundation of China(No.31972529);the Program for Shaanxi Science&Technology(2017TSCXLNY-04-04,2018ZDCXL-NY-0201,2018ZDXM-NY-051);the Program for Yangling Agricultural High-tech Industries Demonstration Zone(2018CXY-10)。

摘　　要：In ovo feeding of vitamin C(VC)has positive effects on the growth performance,immune and antioxidant function in poultry,which indicates that increasing VC content in eggs may be of benefit.This study was to investigate the effects of dietary VC supplementation on VC synthesis and transportation and egg deposition.In Exp.1,in order to select a suitable animal model,VC content was detected in different eggs from different layer species.Vitamin C content was lower in ISA Brown breeder eggs and Hy-Line Brown layer eggs(P<0.05)then in Arbor Acres breeder eggs.In Exp.2,a total of 24 Hy-Line Brown layers(42-week-old)were randomly divided into 3 treatments with 8 replicates and fed a basal diet with VC at 0,200 and 400 mg/kg.Sodium-dependent VC transporter 1 and 2(SVCT1 and SVCT2)expressions were higher in ileum than in duodenum and jejunum(P<0.05).SVCT1 expression was higher but SVCT2 expression was lower in the magnum than in the ovary(P<0.05).L-Gulonolactone oxidase(GLO)and SVCT7 expressions were higher but SVCT2 was lower in the kidney than in the liver(P<0.05).Dietary VC supplementation at 400 mg/kg increased SVCT1 expression in duodenum,ovary and magnum,but decreased GLO and SVCT1 expression in liver(P<0.05).Dietary VC supplementation at 200 and 400 mg/kg increased SVCT2 expression in duodenum,but decreased GLO and SVCT1 expression in kidney and SVCT2 expression in liver(P<0.05).Dietary VC supplementation promoted VC absorption in duodenum and jejunum,but reduced endogenous VC synthesis in liver and kidney.Although dietary VC supplementation enhanced VC transportation in ovary and magnum,it did not increase VC deposition in produced eggs.

关 键 词：Vitamin C Sodium-dependent vitamin C transporter L-Gulonolactone oxidase ALBUMEN YOLK 

分 类 号：S831[农业科学—畜牧学]