Campylobacter infection promotes IFNγ-dependent intestinal pathology via ILC3 to ILC1 conversion

Wayne T. Muraoka, Anna A. Korchagina, Qingqing Xia, Sergey A. Shein, Xi Jing, Zhao Lai, Korri S. Weldon, Li Ju Wang, Yidong Chen, Lawrence W. Kummer, Markus Mohrs, Eric Vivier, Ekaterina P. Koroleva, Alexei V. Tumanov

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Innate lymphoid cells (ILCs) are a heterogeneous family of immune regulators that protect against mucosal pathogens but can also promote intestinal pathology. Although the plasticity between ILCs populations has been described, the role of mucosal pathogens in inducing ILC conversion leading to intestinal pathology remains unclear. Here we demonstrate that IFNγ-producing ILCs are responsible for promoting intestinal pathology in a mouse model of enterocolitis caused by Campylobacter jejuni, a common human enteric pathogen. Phenotypic analysis revealed a distinct population of IFNγ-producing NK1.1T-bet+ILCs that accumulated in the intestine of C. jejuni-infected mice. Adoptive transfer experiments demonstrated their capacity to promote intestinal pathology. Inactivation of T-bet in NKp46+ ILCs ameliorated disease. Transcriptome analysis and cell-fate mapping experiments revealed that IFNγ-producing NK1.1ILCs correspond to ILC1 profile and develop from RORγt+ progenitors. Collectively, we identified a distinct population of NK1.1ex-ILC3s that promotes intestinal pathology through IFNγ production in response to C. jejuni infection.

Original languageEnglish (US)
Pages (from-to)703-716
Number of pages14
JournalMucosal Immunology
Volume14
Issue number3
DOIs
StatePublished - May 2021

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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