综述 REVIEW

内质网应激信号影响猪肠道屏障功能的研究进展

  • 靳宇航 ,
  • 贾海 ,
  • 王仁杰 ,
  • 武振龙
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  • 中国农业大学动物科学技术学院, 北京 100193
靳宇航(1996-),男,河北唐山人,硕士研究生,从事猪肠道营养研究。E-mail:jinyuhang2006@163.com

收稿日期: 2020-10-31

  网络出版日期: 2021-06-10

基金资助

国家自然科学基金项目(31625025,31272451)

Impact of Endoplasmic Reticulum Stress Signaling on Intestinal Barrier Function in Pigs: A Review

  • JIN Yuhang ,
  • JIA Hai ,
  • WANG Renjie ,
  • WU Zhenlong
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  • College of Animal Science and Technology, China Agricultural University, Beijing 100193, China

Received date: 2020-10-31

  Online published: 2021-06-10

摘要

内质网是蛋白质在哺乳动物细胞内修饰、折叠和加工的场所。内质网的功能发生障碍时,未折叠蛋白或错误折叠蛋白在内质网腔中大量蓄积并激活内质网应激信号,细胞通过减少新蛋白质的合成或促进已合成蛋白质的折叠,恢复内质网稳态。因此,内质网应激信号是机体应对不利外界环境的适应性反应。严重的内质网应激可引发细胞凋亡,清除受损细胞。最近的研究发现,断奶仔猪肠道屏障功能障碍的发病过程伴随未折叠蛋白反应和内质网应激,合理的氨基酸营养可以通过调节内质网应激信号相关蛋白,恢复肠上皮屏障功能。本文对内质网应激影响猪肠道屏障功能的研究进展进行总结和综述,为通过营养物质调节内质网应激信号通路改善仔猪肠道健康提供参考。

本文引用格式

靳宇航 , 贾海 , 王仁杰 , 武振龙 . 内质网应激信号影响猪肠道屏障功能的研究进展[J]. 动物营养学报, 2021 , 33(6) : 3072 -3080 . DOI: 10.3969/j.issn.1006-267x.2021.06.009

Abstract

The endoplasmic reticulum is the main site for the modification, folding, and processing of newly synthesized proteins in the mammalian cells. Accumulation of unfolded or misfolded proteins in the endoplasmic reticulum lumen in response to various stimuli can activate the endoplasmic reticulum (ER) stress signaling to restore intestinal homeostasis by reducing the synthesis of proteins or promoting the folding capacity. Therefore, the endoplasmic reticulum stress signallng is an adaptive response of cells to unfavorable external environment. In response to severe endoplasmic reticulum stress, apoptosis is activated to eliminate unfolded or misfolded proteins. Recent studies have shown that intestinal barrier dysfunction in weanling piglets is accompanied by upregulation of proteins implicated in unfolded protein response. Supplementation with amino acid or other additions can restore intestinal epithelial barrier function by regulating proteins implicated in the endoplasmic reticulum stress signaling. In this article, we summarized recent studies on the intestinal health of piglets, especially these associated with ER stress, which might advance our understanding of mechanisms related to the dysfunction of mucosal barrier in piglets.

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