title: Crosstalk between purinergic receptors and canonical signaling pathways in the mouse salivary gland.
abstract: Isolated clusters of mouse parotid acinar cells in combination with live cell imaging were used to explore the crosstalk in molecular signaling between purinergic, cholinergic and adrenergic pathways that integrate to control fluid and protein secretion. This crosstalk was manifested by (1) β-adrenergic receptor activation and amplification of P2X4R evoked Ca(2+) signals, (2) β-adrenergic-induced amplification of P2X7R-evoked Ca(2+) signals and (3) muscarinic receptor induced activation of P2X7Rs via exocytotic activity. The findings from our study reveal that purinoceptor-mediated Ca(2+) signaling is modulated by crosstalk with canonical signaling pathways in parotid acinar cells. Integration of these signals are likely important for dynamic control of saliva secretion to match physiological demand in the parotid gland.
authors.affiliation: Department of Neurosciences, University of Toledo Medical Center, 3000 Arlington Avenue, Toledo, OH 43614, USA.
authors.forename: Sumit
authors.initials: S
authors.lastname: Bhattacharya
authors.affiliation: Department of Neurosciences, University of Toledo Medical Center, 3000 Arlington Avenue, Toledo, OH 43614, USA.
authors.forename: John F
authors.initials: JF
authors.lastname: Imbery
authors.affiliation: Department of Neurosciences, University of Toledo Medical Center, 3000 Arlington Avenue, Toledo, OH 43614, USA.
authors.forename: Prince Tuffour
authors.initials: PT
authors.lastname: Ampem
authors.affiliation: Department of Neurosciences, University of Toledo Medical Center, 3000 Arlington Avenue, Toledo, OH 43614, USA. Electronic address: david.giovannucci@utoledo.edu.
authors.forename: David R
authors.initials: DR
authors.lastname: Giovannucci
mesh_terms: D061354:Acinar Cells / Q000378:metabolism*; D000818:Animals; D002118:Calcium / Q000378:metabolism*; D020013:Calcium Signaling / Q000187:drug effects; D002217:Carbachol / Q000494:pharmacology; D000242:Cyclic AMP / Q000378:metabolism; D005089:Exocytosis / Q000187:drug effects; D008297:Male; D051379:Mice; D018727:Muscarinic Antagonists / Q000494:pharmacology; D010306:Parotid Gland / Q000187:drug effects / Q000378:metabolism*; D011976:Receptors, Muscarinic / Q000378:metabolism; D011983:Receptors, Purinergic / Q000378:metabolism*
chemical_list: D018727:Muscarinic Antagonists; D011976:Receptors, Muscarinic; D011983:Receptors, Purinergic; D002217:Carbachol; D000242:Cyclic AMP; D002118:Calcium
keywords: Calcium signaling; Crosstalk; Epac; Exocytosis; Parotid; Purinergic receptor; Salivary gland; cAMP