Cited by 43Inflammatory Bowel DiseaseImmune Response and InflammationGut microbiota and health

Association of the NOD2 genotype with bacterial translocation via altered cell–cell contacts in Crohnʼs disease patients

Kosovac, Katrin, Brenmoehl, Julia, Holler, Ernst, Falk, Werner, Schoelmerich, Juergen, Hausmann, Martin, Rogler, Gerhard·2010·Inflammatory Bowel Diseases

Abstract

BACKGROUND: Recent insights into the pathogenesis of Crohn's disease (CD) point to an important role of the mucosal barrier and intestinal microflora that may induce a chronic inflammation after crossing the intestinal barrier. The first detected susceptibility gene for CD, NOD2, is a pattern recognition receptor (PRR) for the recognition of the bacterial cell wall component muramyldipeptide (MDP). Binding of MDP to NOD2 is followed by activation of proinflammatory pathways mainly regulated by nuclear factor kappa B (NF-kappaB). In this study we investigated whether impaired recognition of MDP via NOD2 variants is associated with increased bacterial translocation across the epithelial barrier and whether this is followed by increased or decreased NF-kappaB activation. METHODS: NOD2 variants were analyzed in 36 CD patients and 30 controls. Endotoxin was stained by immunohistochemistry in 30 intestinal biopsies from patients carrying NOD2 variants (NOD2-mut) or being NOD2 wildtype (WT). Junctional proteins were visualized by immunofluorescence and quantified by Western blotting. NF-kappaB activation was analyzed by immunohistochemistry in specimens from NOD2-WT and NOD2-mut CD and control patients. RESULTS: We demonstrated the increased presence of endotoxin in the mucosal lamina propria of CD patients carrying NOD2 variants. This was associated with an altered composition of epithelial cell-cell contacts. Patients carrying NOD2 variants displayed increased NF-kappaB activation in the mucosa. CONCLUSIONS: This study for the first time demonstrates that translocation of luminal bacteria and/or bacterial products into the intestinal mucosa is increased in patients carrying NOD2 variants, leading to higher activation of proinflammatory signaling cascades.

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Crossref · 10.1002/ibd.21223

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  • Dysregulated expression of E-cadherin has been reported in tissue biopsies of inflammatory bowel disease patients.

    “Moreover, dysregulated expression of E-cadherin has been reported in tissue biopsies of IBD patients [197].”

    From Insights of Endocytosis Signaling in Health and Disease (2023) · cites this paper as [197]

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Authors
Kosovac, K., Brenmoehl, J., Holler, E., Falk, W., Schoelmerich, J., Hausmann, M., & Rogler, G.
Affiliations
  • University of Regensburg (DE)
  • Research Institute for Farm Animal Biology (FBN) (DE)
  • University Hospital Zurich (CH)
Venue
Inflammatory Bowel Diseases
Published
2010-08
Volume
16
Issue
8
Pages
1311-1321
ISSN
1078-0998 (ISSN-L)
OpenAlex
W1991836246
Cited by
43
References
54
Citations by year
2025: 2 · 2023: 3 · 2022: 1 · 2021: 3 · 2019: 2 · 2018: 2 · 2017: 4 · 2016: 1 · 2015: 6 · 2014: 5 · 2013: 3 · 2012: 4
FWCI
2.51
Type
journal article
Language
en
Open access
closed
Locations
  • Inflammatory Bowel Diseases (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Inflammatory Bowel Disease
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
NOD2, Crohn's disease
MeSH terms
Acetylmuramyl-Alanyl-Isoglutamine, Crohn Disease, Endotoxins, Humans, Intercellular Junctions, Membrane Proteins, Mucous Membrane, Cadherins, Interleukin-8, NF-kappa B, Bacterial Translocation, beta Catenin, Nod2 Signaling Adaptor Protein, Claudins, Occludin

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