Immunoglobulin A and liver diseases.

Immunoglobulin A and liver diseases.
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DOI:
10.1007/s00535-017-1400-8
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发表时间:
2018-06
影响因子:
6.3
通讯作者:
Schnabl B
Schnabl B
中科院分区:
医学1区
文献类型:
--
作者:
Inamine T;Schnabl B

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免疫球蛋白A(IgA)是肠道内的一种主要免疫球蛋白亚型,在维持肠道内稳态方面起着重要作用。分泌型免疫球蛋白A(SIgA)在肠道中具有多种功能,如调节微生物区系组成、保护肠道上皮免受病原微生物的侵袭、帮助免疫系统发育等。肝脏是通过门静脉接收肠源性产品的前线器官,这意味着肝脏可能会受到肠道内环境平衡破坏的严重影响。事实上,一些肝脏疾病,如酒精性肝病,与肠道微生物区系组成改变和血液内毒素水平升高有关。因此,SIgA功能缺陷是与肠道微生物群改变相关的肝病发病的一个重要因素。本文综述了SIgA在肠道微生物群中的作用,并讨论了IgA在肝病,特别是酒精性肝病和非酒精性脂肪性肝病/非酒精性脂肪性肝炎中的作用。
Immunoglobulin A (IgA) is a major immunoglobulin isotype in the gut and plays a role in maintenance of gut homeostasis. Secretory IgA (SIgA) has multiple functions in the gut, such as to regulate microbiota composition, to protect intestinal epithelium from pathogenic microorganisms, and to help for immune-system development. The liver is the front-line organ that receives gut-derived products through the portal vein, implying that the liver could be severely affected by a disrupted intestinal homeostasis. Indeed, some liver diseases like alcoholic liver disease are associated with an altered composition of gut microbiota and increased blood endotoxin levels. Therefore, deficiency of SIgA function appears as a significant factor for the pathogenesis of liver diseases associated with altered gut microbiome. In this review, we describe SIgA functions on the gut microbiome and discuss the role of IgA for liver diseases, especially alcoholic liver disease and non-alcoholic fatty liver disease/non-alcoholic steatohepatitis.
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