Cited by 102Inflammatory Bowel DiseaseGut microbiota and healthMicroscopic Colitis

Inflammation-independent TL1A-mediated intestinal fibrosis is dependent on the gut microbiome

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Jacob, Noam, Jacobs, Jonathan P., Kumagai, Kotaro, Ha, Connie W.Y., Kanazawa, Yoshitake, Lagishetty, Venu, Altmayer, Katherine, Hamill, Ariel M. +7 more·2018·Mucosal Immunology

Abstract

Tumor necrosis factor-like cytokine 1A (TL1A, TNFSF15) is implicated in inflammatory bowel disease (IBD), modulating the location and severity of intestinal inflammation and fibrosis. TL1A expression is increased in inflamed gut mucosa and associated with fibrostenosing Crohn's disease. Tl1a-overexpression in mice lead to spontaneous ileitis, and exacerbated induced proximal colitis and fibrosis. IBD is associated with shifts in the gut microbiome, but the effect of differing microbial populations and their interaction with TL1A on fibrosis has not been investigated. We demonstrate that the pro-fibrotic and inflammatory phenotype resulting from Tl1a-overexpression is abrogated in the absence of resident microbiota. To evaluate if this is due to the absence of a unique bacterial population, as opposed to any bacteria per se, we gavaged germ-free (GF) wild-type and Tl1a-transgenic (Tl1a-Tg) mice with stool from specific pathogen free (SPF) mice and a healthy human donor (Hu). Reconstitution with SPF, but not Hu microbiota, resulted in increased intestinal collagen deposition and fibroblast activation in Tl1a-Tg mice. Notably, there was reduced fibroblast migration and activation under GF conditions compared to native conditions. We then identified several candidate organisms that correlated directly with increased fibrosis in reconstituted mice and showed that these organisms directly impact fibroblast function in vitro. Thus, Tl1a-mediated intestinal fibrosis and fibroblast activation are dependent on specific microbial populations.

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  • Increased liver ECM deposition was observed in germ-free mice compared to conventionally housed mice, and also in MyD88/TRIF-deficient mice.

    “Increased liver ECM deposition was observed in germ free mice compared to conventionally housed mice166, which was also observed in MyD88/TRIF deficient mice.”

    From Fibrosis: from mechanisms to medicines (2020) · cites this paper as [166]

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Authors
Jacob, N., Jacobs, J. P., Kumagai, K., Ha, C. W. Y., Kanazawa, Y., Lagishetty, V., Altmayer, K., Hamill, A. M., Von Arx, A., Sartor, R. B., Devkota, S., Braun, J., Michelsen, K. S., Targan, S. R., & Shih, D. Q.
Affiliations
  • Cedars-Sinai Medical Center (US)
  • University of California, Los Angeles (US)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
  • Jacob, Noam
  • Shih, David Q.
Venue
Mucosal Immunology
Publisher
Elsevier BV
Published
2018-09
Volume
11
Issue
5
Pages
1466-1476
ISSN
1933-0219 (ISSN-L)
OpenAlex
W2863875449
Cited by
102
References
51
Citations by year
2026: 9 · 2025: 13 · 2024: 18 · 2023: 10 · 2022: 12 · 2021: 21 · 2020: 12 · 2019: 5 · 2018: 2
FWCI
6.12
Type
journal article
Language
en
Open access
Locations
  • Mucosal Immunology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • Crohn's and Colitis Foundation
  • National Institutes of Health (NIH T32, NIH-R01, DK034987, DK056328, T32DK07180—40, P40OD010995)
  • Inflammatory Bowel and Immunobiology Research Institute
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01DK046763, K08DK093578, P01DK094779, P30DK041301, R01DK056328, L30 DK110927, T32DK007180, P30DK034987)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
  • Health Sciences › Medicine › Epidemiology › Microscopic Colitis
Keywords
TL1A, TNFSF15, intestinal fibrosis, gut microbiota, inflammatory bowel disease, Crohn's disease, fibroblast activation, fibroblast migration, germ-free mice, transgenic mice, collagen deposition
MeSH terms
Gastrointestinal Microbiome, Animals, Colitis, Collagen, Crohn Disease, Fibroblasts, Fibrosis, Humans, Ileitis, Inflammation, Intestinal Mucosa, Intestines, Mice, Inbred C57BL, Mice, Transgenic, Inflammatory Bowel Diseases, Mice, Tumor Necrosis Factor Ligand Superfamily Member 15

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