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Updated: May 1, 2026

An Intravital Microscopy-Based Approach to Assess Intestinal Permeability and Epithelial Cell Shedding Performance
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Alphavbeta6 is required in maintaining the intestinal epithelial barrier function.

Yong Yu1, Si Chen, Gao-Feng Lu

  • 1Department of Gastroenterology, the Second Hospital, Zhengzhou University, Zhengzhou, China.

Cell Biology International
|March 29, 2014
PubMed
Summary
This summary is machine-generated.

Integrin alphavbeta6 (avb6) maintains epithelial barrier function. Its deficiency increases intestinal permeability to allergens like ovalbumin (OVA), but this can be reversed with supplemental avb6.

Keywords:
T84 cellsepithelial barrier functionsintegrin alpha v beta 6permeabilitytransepithelial electric resistance

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Area of Science:

  • Cell Biology
  • Immunology
  • Gastroenterology

Background:

  • Epithelial barrier dysfunction contributes to numerous diseases.
  • The precise mechanisms underlying barrier dysfunction remain unclear.
  • Integrin alphavbeta6 (avb6) plays a role in mucosal homeostasis.

Purpose of the Study:

  • To investigate the role of integrin alphavbeta6 (avb6) in maintaining epithelial barrier function.
  • To assess the impact of avb6 on intestinal permeability and antigen translocation.

Main Methods:

  • Utilized T84 cell monolayers to model the intestinal epithelium.
  • Measured transepithelial electrical resistance (TER) and ovalbumin (OVA) permeability.
  • Assessed OVA antigenicity via OVA-specific T cell proliferation assays.

Main Results:

  • Knockdown of avb6 significantly increased T84 monolayer permeability to OVA.
  • TER remained unaffected by avb6 knockdown.
  • Exogenous avb6 addition restored barrier function, compensating for avb6 deficiency.
  • Recombinant avb6 inhibited TNF-α-induced hyperpermeability to OVA.

Conclusions:

  • Integrin alphavbeta6 is crucial for maintaining epithelial barrier integrity against allergen passage.
  • avb6 deficiency compromises barrier function, leading to increased antigen exposure.
  • Targeting avb6 may offer therapeutic potential for diseases involving epithelial barrier dysfunction.