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Curr Opin Pharmacol. 2009 Jun;9(3):262-7. doi: 10.1016/j.coph.2009.02.004. Epub 2009 Mar 13.

Purinergic receptors in airway epithelia.

Author information

1
Cystic Fibrosis/Pulmonary Research & Treatment Center, Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. eduardo_lazarowski@med.unc.edu

Abstract

Nucleotides and nucleosides within the airway surface liquid regulate mucociliary clearance (MCC) activities, the primary innate defense mechanism that removes foreign particles and pathogens from airway surfaces. Nucleotide and nucleoside actions in the airways are mediated mainly by two purinergic receptor subtypes, the Gq-coupled ATP/UTP-sensing P2Y2 receptor and the Gs-coupled A2b adenosine receptor. Activation of the A2b receptor results in cyclic AMP-dependent activation of the cystic fibrosis transmembrane regulator (CFTR) Cl- channel and stimulation of ciliary beat frequency. Agonist occupation of the P2Y2 receptor promotes inhibition of Na+ absorption as well as CFTR-dependent and CFTR-independent Cl- secretion, ciliary beating, and mucin secretion.

PMID:
19285919
PMCID:
PMC2692813
DOI:
10.1016/j.coph.2009.02.004
[Indexed for MEDLINE]
Free PMC Article

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