What question did this study set out to answer?

The study aims to understand how claudin 18.1 influences human airway epithelial differentiation and repair responses.

May 14, 2026Physiology

CLDN18.1 Regulates Human Airway Epithelial Proliferation and Coordinates Repair Responses

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Randomized trial investigates claudin 18.1's influence on airway epithelial responses in chronic lung disease, suggesting new treatment strategies.

The study aims to understand how claudin 18.1 influences human airway epithelial differentiation and repair responses.
Generated CRISPR-Cas9-mediated knockout of claudin 18.1 in human bronchial epithelial cells.
Cell differentiation was assessed at air-liquid interface for 28 days with quantification via confocal microscopy and qRT-PCR.
Knockout efficiency confirmed with Sanger sequencing and western blot.
CLDN18.1 knockout did not significantly alter baseline differentiation into ciliated, club, or mucus cell lineages.
Significant increase in total cell number in CLDN18.1-deficient cultures.
Findings support claudin 18.1's known tumor-suppressive function and highlight its role in epithelial repair.

Wineinger et al. (2026) studied this question.

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Randomized trial investigates claudin 18.1's influence on airway epithelial responses in chronic lung disease, suggesting new treatment strategies.