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Updated: May 21, 2026
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An Intravital Microscopy-Based Approach to Assess Intestinal Permeability and Epithelial Cell Shedding Performance
Published on: December 3, 2020
Abnormal intestinal permeability in Crohn's disease pathogenesis
Christopher W Teshima1, Levinus A Dieleman, Jon B Meddings
1Division of Gastroenterology, University of Alberta, Edmonton, Alberta, Canada.
Annals of the New York Academy of Sciences
|June 27, 2012
Summary
Increased small intestinal permeability, a hallmark of Crohn's disease, may stem from genetic factors like NOD2 mutations, potentially preceding inflammation. Understanding this gut barrier defect is key to Crohn's pathogenesis.
Area of Science:
- Gastroenterology
- Immunology
- Genetics
Background:
- Increased small intestinal permeability is observed in Crohn's disease (CD) patients and their relatives.
- The role of this compromised gut barrier in CD pathogenesis is unclear.
- Gut barrier defects may precede inflammation in rodent models.
Purpose of the Study:
- To investigate the role of small intestinal permeability in Crohn's disease pathogenesis.
- To explore the link between genetic factors, gut barrier function, and inflammation in CD.
Main Methods:
- Review of existing literature on small intestinal permeability in CD.
- Analysis of the association between NOD2 gene mutations and gut barrier function.
- Consideration of findings from rodent colitis models.
Main Results:
- Small intestinal permeability is elevated in CD patients and their relatives.
- NOD2 mutations, affecting immune responses to bacteria, are linked to abnormal permeability.
- Rodent models suggest barrier defects can precede inflammatory changes.
Conclusions:
- Genetically determined abnormal gut barrier function, possibly linked to NOD2 mutations, may contribute to Crohn's disease development.
- Further research is needed to determine if abnormal permeability is a cause or consequence of inflammation in CD.
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