Cited by 2,017Barrier Structure and Function StudiesGastrointestinal motility and disordersCell Adhesion Molecules Research

Mechanisms Regulating Intestinal Barrier Integrity and Its Pathological Implications

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Chelakkot, Chaithanya, Ghim, Jaewang, Ryu, Sung Ho·2018·Experimental & Molecular Medicine

Abstract

The gastrointestinal tract is a specialized organ in which dynamic interactions between host cells and the complex environment occur in addition to food digestion. Together with the chemical barrier of the mucosal layer and the cellular immune system, the epithelial cell layer performs a pivotal role as the first physical barrier against external factors and maintains a symbiotic relationship with commensal bacteria. The tight junction proteins, including occludin, claudins, and zonula occludens, are crucial for the maintenance of epithelial barrier integrity. To allow the transport of essential molecules and restrict harmful substances, the intracellular signaling transduction system and a number of extracellular stimuli such as cytokines, small GTPases, and post-translational modifications dynamically modulate the tight junction protein complexes. An imbalance in these regulations leads to compromised barrier integrity and is linked with pathological conditions. Despite the obscurity of the causal relationship, the loss of barrier integrity is considered to contribute to inflammatory bowel disease, obesity, and metabolic disorders. The elucidation of the role of diseases in barrier integrity and the underlying regulatory mechanisms have improved our understanding of the intestinal barrier to allow the development of novel and potent therapeutic approaches.

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Authors
Chelakkot, C., Ghim, J., & Ryu, S. H.
Affiliations
  • Pohang University of Science and Technology (KR)
  • NovaCell Technology (South Korea) (KR)
Corresponding author
Ryu, Sung Ho
Venue
Experimental & Molecular Medicine
Published
2018-08
Volume
50
Issue
8
Pages
1-9
ISSN
  • 1226-3613 (ISSN-L)
  • 2092-6413
OpenAlex
W2885093728
Cited by
2,017
References
121
Citations by year
2026: 335 · 2025: 400 · 2024: 405 · 2023: 252 · 2022: 249 · 2021: 214 · 2020: 116 · 2019: 44 · 2018: 2
FWCI
8.89
Type
journal article
Language
en
Open access
Locations
  • Experimental & Molecular Medicine (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Open Access System for Information Sharing (Pohang University of Science and Technology) (submittedVersion)
Funders
Samsung (SRFC-MA1502-14)
Topics
  • Life Sciences › Neuroscience › Neurology › Barrier Structure and Function Studies
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Health Sciences › Medicine › Immunology and Allergy › Cell Adhesion Molecules Research
Keywords
intestinal barrier integrity, tight junction proteins, occludin, claudins, zonula occludens, epithelial barrier function, commensal bacteria, cytokines, small GTPases, post-translational modification, signal transduction, inflammatory bowel disease, obesity, metabolic disorders, intestinal epithelium
MeSH terms
Animals, Epithelial Cells, Humans, Intestinal Diseases, Intestinal Mucosa, Intestines, Tight Junction Proteins

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