Cited by 91Inflammatory Bowel DiseaseIL-33, ST2, and ILC PathwaysGut microbiota and health

Flagellin-mediated activation of IL-33-ST2 signaling by a pathobiont promotes intestinal fibrosis

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Imai, Jin, Kitamoto, Sho, Sugihara, Kohei, Nagao-Kitamoto, Hiroko, Hayashi, Atsushi, Morhardt, Tina L., Kuffa, Peter, Higgins, Peter D.R. +2 more·2019·Mucosal Immunology

Abstract

Intestinal fibrosis is a severe complication in patients with Crohn's disease (CD). Unfortunately, the trigger leading to the development of intestinal fibrosis in the context of CD remains elusive. Here, we show that colonization by a CD-associated pathobiont adherent-invasive Escherichia coli (AIEC) promotes the development of intestinal fibrosis. Exogenously inoculated AIEC strain LF82 and commensal E. coli HS were gradually eradicated from the intestine in healthy mice. In Salmonella- or dextran sodium sulfate-induced colitis models, AIEC exploited inflammation and stably colonize the gut. Consequently, persistent colonization by AIEC LF82 led to substantial fibrosis. In contrast, commensal E. coli HS was unable to derive a growth advantage from inflammation, thereby failing to colonize the inflamed intestine or promote intestinal fibrosis. AIEC colonization potentiated the expression of the IL-33 receptor ST2 in the intestinal epithelium, which is crucial for the development of intestinal fibrosis. The induction of ST2 by AIEC LF82 was mediated by flagellin, as the ΔfliC mutant failed to induce ST2. These observations provide novel insights into pathobiont-driven intestinal fibrosis and can lead to the development of novel therapeutic approaches for the treatment of intestinal fibrosis in the context of CD that target AIEC and/or its downstream IL-33-ST2 signaling.

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  • Deletion of TRIF in a diet-induced NASH mouse model reduced hepatic steatosis but increased hepatic fibrosis, and TRIF−/− HSCs expressed higher levels of CXCL1 and C-C motif chemokine ligands in response to LPS.

    “Deletion of TRIF in a diet-induced NASH mouse model reduced hepatic steatosis but increased hepatic fibrosis, and TRIF−/− HSCs expressed higher levels of CXCL1 and C-C motif chemokine ligands in response to LPS”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [165]

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Authors
Imai, J., Kitamoto, S., Sugihara, K., Nagao-Kitamoto, H., Hayashi, A., Morhardt, T. L., Kuffa, P., Higgins, P. D. R., Barnich, N., & Kamada, N.
Affiliations
  • Tokai University (JP)
  • University of Michigan (US)
  • Inserm (FR)
Corresponding author
Kamada, Nobuhiko
Venue
Mucosal Immunology
Publisher
Elsevier BV
Published
2019-05
Volume
12
Issue
3
Pages
632-643
ISSN
1933-0219 (ISSN-L)
OpenAlex
W2912821148
Cited by
91
References
42
Citations by year
2026: 9 · 2025: 13 · 2024: 14 · 2023: 12 · 2022: 11 · 2021: 19 · 2020: 8 · 2019: 5
FWCI
6.48
Type
journal article
Language
en
Open access
Locations
  • Mucosal Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • HAL (submittedVersion)
Funders
  • Crohn's and Colitis Foundation of America
  • Prevent Cancer Foundation
  • University of Michigan
  • Uehara Memorial Foundation
  • Kenneth Rainin Foundation
  • Crohn's and Colitis Foundation (632826)
  • Georgia Clinical and Translational Science Alliance
  • Mitsukoshi Health and Welfare Foundation
  • National Institutes of Health (DK108901)
  • University of Michigan Center for Gastrointestinal Research (5 P30 DK034933)
  • Japan Society for the Promotion of Science
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK034933, R21DK110146, T32DK094775, R01DK108901)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Life Sciences › Immunology and Microbiology › Immunology › IL-33, ST2, and ILC Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
intestinal fibrosis, Crohn's disease, adherent-invasive Escherichia coli, pathobionts, flagellin, IL-33, ST2 receptor, commensal Escherichia coli, intestinal colonization, DSS-induced colitis, intestinal epithelium
MeSH terms
Interleukin-33, Interleukin-1 Receptor-Like 1 Protein, Animals, Cells, Cultured, Colitis, Crohn Disease, Disease Models, Animal, Escherichia coli, Escherichia coli Infections, Fibrosis, Flagellin, Humans, Intestinal Mucosa, Mice, Inbred C57BL, Mutation, Salmonella, Salmonella Infections, Signal Transduction, Dextran Sulfate, Mice

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