Alteration of pulmonary epithelial permeability by cathepsin S in chronic obstructive pulmonary disease].

S Chesseron, A Saidi, F Lecaille, G Lalmanach, P Bigot

Revue des maladies respiratoires 2023 Mar

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Smoking is accountable for most of the chronic obstructive pulmonary disease (COPD) cases. COPD, which is characterized by the development of chronic bronchitis, could be associated with emphysema. In active smokers, there is an overexpression of cathepsin S, a cysteine protease, which participates in the development of emphysema via its elastinolytic activity. Likewise, we demonstrated that cathepsin S could degrade one or more protein constituents of cell junctions. This deleterious proteolytic activity leads to an alteration of the integrity of the lung epithelial barrier, which in turn could aggravate chronic inflammation and promote the exacerbation phases associated with infections. Copyright © 2023. Published by Elsevier Masson SAS.

Citation

S Chesseron, A Saidi, F Lecaille, G Lalmanach, P Bigot. Alteration of pulmonary epithelial permeability by cathepsin S in chronic obstructive pulmonary disease]. Revue des maladies respiratoires. 2023 Mar;40(3):250-253