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Related Concept Videos

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Related Experiment Video

Updated: May 12, 2025

Functional Assessment of Intestinal Tight Junction Barrier and Ion Permeability in Native Tissue by Ussing Chamber Technique
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Claudin-17 Deficiency Drives Vascular Permeability and Inflammation Causing Lung Injury.

Mir S Adil1,2, Varun Parvathagiri1,2, Abdulaziz H Alanazi1,2

  • 1Program in Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia, Augusta, GA 30912, USA.

International Journal of Molecular Sciences
|May 7, 2025
PubMed
Summary

Claudin-17 (Cldn17) deficiency increases vascular permeability and lung injury. Suppression of this tight-junction protein disrupts immune homeostasis and metabolic pathways, highlighting its role in inflammatory lung diseases.

Keywords:
Cldn17inflammationlung injurypulmonary edemavascular permeability

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Area of Science:

  • Cell Biology
  • Immunology
  • Pulmonary Medicine

Background:

  • The function of claudin-17 (Cldn17), a tight-junction protein, in regulating vascular permeability is not well understood.
  • Investigating Cldn17's role is crucial for understanding vascular homeostasis and inflammatory lung conditions.

Purpose of the Study:

  • To elucidate the impact of claudin-17 (Cldn17) suppression on vascular permeability and associated physiological responses.
  • To identify the molecular mechanisms and pathways affected by Cldn17 deficiency in lung tissue.

Main Methods:

  • Utilized Miles assay and Matrigel plug assay to assess vascular permeability.
  • Conducted histopathological analysis and measured wet/dry lung weight ratios to evaluate lung injury and edema.
  • Employed ribosomal nucleic acid sequencing for transcriptional profiling and differential gene expression analysis.

Main Results:

  • Cldn17 suppression significantly increased vascular permeability in lungs and skin, evidenced by enhanced dye and hemoglobin extravasation.
  • Histopathology revealed lung injury, alveolar flooding, and inflammatory cell infiltration in Cldn17-deficient mice.
  • Transcriptomic analysis showed significant alterations in inflammatory pathways (e.g., leukocyte adhesion, interferon-gamma response) and metabolic dysregulation.

Conclusions:

  • Claudin-17 is a critical regulator of vascular permeability and immune homeostasis.
  • Cldn17 deficiency exacerbates lung injury and alters immune signaling, suggesting its potential as a therapeutic target for inflammatory lung diseases.