| Literature DB >> 17586501 |
Marie-Christine Nlend1, Andreas Schmid, Zoltan Sutto, George A Ransford, Gregory E Conner, Nevis Fregien, Matthias Salathe.
Abstract
Purinergic stimulation of human airway epithelia results in a prolonged increase in ciliary beat frequency that depends on calcium-mediated cAMP production [Lieb, T., Wijkstrom Frei, C., Frohock, J.I., Bookman, R.J. and Salathe, M. (2002) Prolonged increase in ciliary beat frequency after short-term purinergic stimulation in human airway epithelial cells. J. Physiol. (Lond.) 538, 633-646]. Here, fully differentiated human airway epithelial cells in culture are shown to express calcium-stimulated transmembrane adenylyl cyclase (tmAC) isoforms (types 1, 3, and 8) by reverse transcription polymerase chain reaction. Immunohistochemistry of tracheal sections and fully differentiated airway epithelial cell cultures revealed polarized expression of these tmACs, with types 1 and 8 localized to the apical membrane and thus at the position required for ciliary regulation. Real-time, ciliated-cell specific cAMP production by tmACs upon apical, purinergic stimulation with UTP was confirmed using fluorescent energy resonance transfer between fluorescently tagged PKA subunits.Entities:
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Year: 2007 PMID： 17586501 PMCID： PMC1986749 DOI： 10.1016/j.febslet.2007.06.015
Source DB: PubMed Journal: FEBS Lett ISSN： 0014-5793 Impact factor: 4.124