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Updated: Jun 2, 2026
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Culturing of Human Nasal Epithelial Cells at the Air Liquid Interface
Published on: October 8, 2013
Nucleotide release by airway epithelia
Eduardo R Lazarowski1, Juliana I Sesma, Lucia Seminario
1Cystic Fibrosis Pulmonary Research and Treatment Center, University of North Carolina, 7011 Thurston-Bowles building, Chapel Hill, NC, 27599, USA, eduardo_lazarowski@med.unc.edu.
Sub-Cellular Biochemistry
|May 12, 2011
Summary
Airway epithelial cells release purines like ATP to regulate innate defenses. Multiple signaling pathways, including those involving P2Y(2)R and protease-activated receptors, control this crucial nucleotide release.
Area of Science:
- Cell Biology
- Immunology
- Respiratory Medicine
Background:
- Airway innate defenses rely on purinergic signaling.
- Epithelial purine release is crucial but mechanisms are complex.
- External triggers for purine release are well-documented.
Purpose of the Study:
- To detail the receptors and signaling cascades for nucleotide release from airway epithelia.
- To elucidate the distinct mechanisms of purine secretion.
- To update knowledge on purinergic signaling in airway defense.
Main Methods:
- Review of current literature on purinergic signaling pathways.
- Analysis of molecular mechanisms of nucleotide release.
- Focus on receptor-ligand interactions and downstream signaling.
Main Results:
- Identified ATP, ADP, AMP, and nucleotide sugars as secreted purines.
- Described three distinct release mechanisms: constitutive, goblet cell-mediated, and regulated non-mucous cell pathways.
- Highlighted roles of P2Y(2)R, Ca(2+) signaling, PARs, G(12/13), RhoGEF, and RhoA.
Conclusions:
- Multiple complex pathways regulate airway epithelial purine release.
- These purinergic events fine-tune epithelial responses in innate defense.
- Understanding these mechanisms is key to airway disease research.
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