Journal article
Tryptase does not alter transepithelial conductance or paracellular permeability in human airway epithelial cells
American journal of rhinology & allergy, Vol.24(2), pp.126-128
03/2010
DOI: 10.2500/ajra.2010.24.3442
PMID: 20338110
Abstract
Cell tight junction proteins create a barrier between airway epithelial cells to limit paracellular transport from the apical to basolateral surface. This barrier can impede the entry of respiratory pathogens and toxins from the airway lumen into the systemic circulation. Mast cell-mediated inflammation in the human airway can cause a disruption of this barrier. Tryptase is one of the major mediators released by mast cells and has been studied extensively in diseases such as asthma, reflux, and sinusitis. We hypothesize that tryptase may play a role in airway paracellular permeability by disrupting the cell tight junction proteins.
We tested this hypothesis by applying tryptase on the apical and basolateral surface to primary human airway epithelia grown in an air-liquid interface and measured changes in the transepithelial conductance and paracellular permeability of the membrane during short (every minute) and longer (over hours) time courses. We then immunostained the cell membranes for occludins and claudins to observe for changes in the structure of the tight junctions after tryptase application.
Our data show that tryptase does not alter paracellular permeability in human airway cells over minutes or hours, and that tryptase does not alter the structure of the cell junction.
Tryptase alone does not alter paracellular permeability in human airway cells. Tryptase may be altering the epithelial membrane independent of the cell tight junction pathway or other mast cell mediators may play a role in permeability.
Details
- Title: Subtitle
- Tryptase does not alter transepithelial conductance or paracellular permeability in human airway epithelial cells
- Creators
- Eugene H Chang - Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA. eugene-chang@uiowa.eduJohn H LeeJoseph Zabner
- Resource Type
- Journal article
- Publication Details
- American journal of rhinology & allergy, Vol.24(2), pp.126-128
- DOI
- 10.2500/ajra.2010.24.3442
- PMID
- 20338110
- ISSN
- 1945-8924
- eISSN
- 1945-8932
- Language
- English
- Date published
- 03/2010
- Academic Unit
- Pulmonary, Critical Care, and Occupational Medicine; Internal Medicine
- Record Identifier
- 9984094392802771
Metrics
26 Record Views