Peroxiredoxin V contributes to antioxidant defense of lung epithelial cells.

The aim of this study was to determine the functional significance of peroxiredoxin V (PRXV) in defense against oxidative stress and changes of its expression in human lung inflammation. We used in vitro cell cultures and retrospective analyses of human sputum samples to perform the study. We found that stable clones of lung epithelial cell lines A549 and U1810 with reduced expression of PRXV were prone to oxidative damage.

Cigarette smoke extract inhibits expression of peroxiredoxin V and increases airway epithelial permeability.

Inhaled cigarette smoke induces oxidative stress in the epithelium of airways. Peroxiredoxin V (PRXV) is a potent antioxidant protein, highly expressed in cells of the airway epithelium. The goal of our study was to determine whether cigarette smoke extract (CSE) influenced expression of this protein in airway epithelia in vivo and in vitro.