Hog barn dust slows airway epithelial cell migration in vitro through a PKCα-dependent mechanism
- 1 December 2007
- journal article
- research article
- Published by American Physiological Society in American Journal of Physiology-Lung Cellular and Molecular Physiology
- Vol. 293 (6), L1469-L1474
- https://doi.org/10.1152/ajplung.00274.2007
Abstract
Agricultural work and other occupational exposures are responsible for ∼15% of chronic obstructive pulmonary disease (COPD). COPD involves airway remodeling in response to chronic lung inflammatory events and altered airway repair mechanisms. However, the effect of agricultural dust exposure on signaling pathways that regulate airway injury and repair has not been well characterized. A key step in this process is migration of airway cells to restore epithelial integrity. We have previously shown that agents that activate the critical regulatory enzyme protein kinase C (PKC) slow cell migration during wound repair. Based on this observation and direct kinase measurements that demonstrate that dust extract from hog confinement barns (HDE) specifically activates the PKC isoforms PKCα and PKCε, we hypothesized that HDE would slow wound closure time in airway epithelial cells. We utilized the human bronchial epithelial cell line BEAS-2B and transfected BEAS-2B cell lines that express dominant negative (DN) forms of PKC isoforms to demonstrate that HDE slows wound closure in BEAS-2B and PKCε DN cell lines. However, in PKCα DN cells, wound closure following HDE treatment is not significantly different than media-treated cells. These results suggest that the PKCα isoform is an important regulator of cell migration in response to agricultural dust exposure.Keywords
This publication has 26 references indexed in Scilit:
- Feedlot dust stimulation of interleukin-6 and -8 requires protein kinase Cε in human bronchial epithelial cellsAmerican Journal of Physiology-Lung Cellular and Molecular Physiology, 2007
- Protein-kinase-C-mediated β-catenin phosphorylation negatively regulates the Wnt/β-catenin pathwayJournal of Cell Science, 2006
- Adenosine A2Areceptors promote adenosine-stimulated wound healing in bronchial epithelial cellsAmerican Journal of Physiology-Lung Cellular and Molecular Physiology, 2006
- Cigarette Smoke Extract Increases C5a Receptor Expression in Human Bronchial Epithelial CellsJournal of Pharmacology and Experimental Therapeutics, 2005
- Hog barn dust extract augments lymphocyte adhesion to human airway epithelial cellsJournal of Applied Physiology, 2004
- Ena/VASP Proteins: Regulators of the Actin Cytoskeleton and Cell MigrationAnnual Review of Cell and Developmental Biology, 2003
- The Ena/VASP enigmaJournal of Cell Science, 2002
- Phosphorylation of the Vasodilator-stimulated Phosphoprotein Regulates Its Interaction with ActinJournal of Biological Chemistry, 2000
- Acetaldehyde-Stimulated PKC Activity in Airway Epithelial Cells Treated with Smoke Extract from Normal and Smokeless CigarettesProceedings of the Society for Experimental Biology and Medicine, 2000
- A serum-free method for culturing normal human bronchial epithelial cells at clonal densityJournal of Tissue Culture Methods, 1985