Campylobacter infection promotes IFNγ-dependent intestinal pathology via ILC3 to ILC1 conversion.
Wayne T MuraokaAnna A KorchaginaQingqing XiaSergey A SheinXi JingZhao LaiKorri S WeldonLi-Ju WangYidong ChenLawrence W KummerMarkus MohrsEric VivierEkaterina P KorolevaAlexei V TumanovPublished in: Mucosal immunology (2020)
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 NK1.1-T-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 NK1.1-ILCs correspond to ILC1 profile and develop from RORγt+ progenitors. Collectively, we identified a distinct population of NK1.1-ex-ILC3s that promotes intestinal pathology through IFNγ production in response to C. jejuni infection.
Keyphrases
- nk cells
- dendritic cells
- immune response
- mouse model
- antimicrobial resistance
- endothelial cells
- high resolution
- transcription factor
- single cell
- cell therapy
- stem cells
- adipose tissue
- cell proliferation
- gram negative
- metabolic syndrome
- multidrug resistant
- bone marrow
- high density
- cell death
- cystic fibrosis
- preterm birth