综述 Review

肠道对共生微生物的免疫耐受机制

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  • 浙江大学奶业科学研究所, 杭州 310058
乐佳清(1992-),女,浙江嘉兴人,硕士研究生,从事反刍动物营养研究。E-mail:945841362@qq.com

收稿日期: 2016-11-04

  网络出版日期: 2017-05-13

基金资助

中央高校基本科研业务费专项资金资助(2015FZA6016)

Intestinal Immune Tolerance Mechanism of Symbiotic Microorganisms

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  • Institute of Dairy Science, Zhejiang University, Hangzhou 310058, China

Received date: 2016-11-04

  Online published: 2017-05-13

摘要

动物体肠道中存在数以亿计的微生物,这些共生的微生物能辅助动物体消化代谢和维持肠道稳态。但微生物及其代谢产物同样可以作为抗原影响肠道的正常功能。正常情况下,肠道免疫系统能准确辨识共生微生物及其代谢产物,对其做出免疫耐受,维持内环境稳态;此外,肠道免疫系统还可以避免由于对无害抗原产生反应而造成免疫资源的浪费。免疫耐受已被广泛应用于临床医学,用于减少器官移植后排斥现象的发生,降低子宫对胎儿的免疫排斥反应等。但就如何利用免疫耐受机制减缓反刍动物瘤胃酸中毒,提高瘤胃微生物蛋白质的合成和利用效率,完善益生素的饲用规程仍鲜有报道。为此,本综述就免疫耐受的一般概念和应用、肠道免疫系统的组成和功能、肠道共生微生物的免疫原性以及肠道免疫耐受的形成机制进行了阐述。

本文引用格式

乐佳清, 王佳堃 . 肠道对共生微生物的免疫耐受机制[J]. 动物营养学报, 2017 , 29(5) : 1489 -1497 . DOI: 10.3969/j.issn.1006-267x.2017.05.006

Abstract

There are millions of microorganisms in the intestine of animals. These symbiotic microorganisms can assist digestion and metabolism of organisms and maintain intestinal stability. However, the microorganisms and their metabolites can also serve as an antigen affect the normal function of the intestine. Under normal circumstances, the intestinal immune system can accurately identify symbiotic microorganisms and their metabolites to make immune tolerance and maintain the stability of the internal environment. On the other hand, it avoids reaction to harmless antigens caused by the waste of immune resources. Immune tolerance has been widely used in clinical medicine to reduce the occurrence of rejection after organ transplantation and decrease uterine immune rejection of the fetus. However, there is little report on how to use the immune tolerance mechanism to reduce the rumen acidosis of ruminants and improve the synthesis and utilization efficiency of ruminal microbial protein, and to improve the feeding regulations of probiotics. Therefore, this review describes the general concepts and applications of immune tolerance, the composition and function of the intestinal immune system, the immunogenicity of intestinal symbiotic microorganisms and the mechanisms of intestinal immune tolerance.

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