综述 Review

尿素转运因子B影响牛瘤胃尿素氮再循环的机制

  • 付彤 ,
  • 廉红霞 ,
  • 高腾云 ,
  • 赵卫东 ,
  • 孙宇 ,
  • 李改英
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  • 河南农业大学牧医工程学院, 郑州 450002

收稿日期: 2013-06-15

  网络出版日期: 2013-11-19

基金资助

现代奶业产业技术体系建设专项资金(CARS-37);中国博士后科学基金资助项目(2013M541976);河南省博士后科研资助项目(2011032)

Mechanism for Effects of Urea Transporter B on Urea Nitrogen Recycling in Rumen of Cows

  • FU Tong ,
  • LIAN Hongxia ,
  • GAO Tengyun ,
  • ZHAO Weidong ,
  • SUN Yu ,
  • LI Gaiying
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  • College of Animal Science and Veterinary Medicine, Henan Agricultural University, Zhengzhou 450002, China

Received date: 2013-06-15

  Online published: 2013-11-19

摘要

尿素转运因子B(UT-B)是高选择性快速通透尿素的膜通道蛋白分子,介导尿素顺浓度梯度的跨膜转运,对于尿素氮进入瘤胃的再循环过程起着关键的调控作用。其基因表达受饲粮氮水平及瘤胃发酵参数和内环境指标等影响。但UT-B如何调控牛瘤胃尿素氮再循环,尚有待进一步研究。本文旨在就牛瘤胃尿素氮再循环及UT-B在牛瘤胃尿素氮再循环中的作用进行综述,同时也对影响UT-B表达的因素,如饲粮氮水平和瘤胃发酵参数及内环境指标等进行探讨。

本文引用格式

付彤 , 廉红霞 , 高腾云 , 赵卫东 , 孙宇 , 李改英 . 尿素转运因子B影响牛瘤胃尿素氮再循环的机制[J]. 动物营养学报, 2013 , 25(12) : 2798 -2803 . DOI: 10.3969/j.issn.1006-267x.2013.12.003

Abstract

Urea transporter B (UT-B) is a membrane channel protein which rapidly transports urea with high selectivity, and modulates urea movement across biological membrane. UT-B plays a key role in the urea nitrogen recycling into the rumen. And its gene expression is affected by the dietary nitrogen level, rumen fermentation parameters and rumen environment indexes. But the mechanism which UT-B modulates urea nitrogen recycling is unclear. Here, we reviewed nitrogen recycling in rumen of cows and the role of UT-B in it, and discussed the influencing factors of UT-B gene expression, such as dietary nitrogen level, rumen fermentation parameters and rumen environment indexes, etc.

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