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Bacteria-Induced Group 2 Innate Lymphoid Cells in the Stomach Provide Immune Protection through Induction of IgA.

Abstract：

:The intestinal microbiota shapes and directs immune development locally and systemically, but little is known about whether commensal microbes in the stomach can impact their immunological microenvironment. Here, we report that group 2 innate lymphoid cells (ILC2s) were the predominant ILC subset in the stomach and show that their homeostasis and effector functions were regulated by local commensal communities. Microbes elicited interleukin-7 (IL-7) and IL-33 production in the stomach, which in turn triggered the propagation and activation of ILC2. Stomach ILC2s were also rapidly induced following infection with Helicobacter pylori. ILC2-derived IL-5 resulted in the production of IgA, which coated stomach bacteria in both specific pathogen-free (SPF) and H. pylori-infected mice. Our study thus identifies ILC2-dependent IgA response that is regulated by the commensal microbiota, which is implicated in stomach protection by eliminating IgA-coated bacteria including pathogenic H. pylori.

journal_name

Immunity

journal_title

Immunity

authors

Satoh-Takayama N,Kato T,Motomura Y,Kageyama T,Taguchi-Atarashi N,Kinoshita-Daitoku R,Kuroda E,Di Santo JP,Mimuro H,Moro K,Ohno H

doi

10.1016/j.immuni.2020.03.002

subject

Has Abstract

pub_date

2020-04-14 00:00:00

pages

635-649.e4

issue

4

eissn

1074-7613

issn

1097-4180

pii

S1074-7613(20)30090-X

journal_volume

52

pub_type

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