title: Characterization of cAMP-dependent protein kinase activation by CCK in rat pancreas.
abstract: This study reports on the use of a new sensitive assay of cAMP-dependent protein kinase activity to examine the effect of cholecystokinin (CCK) on the cAMP second messenger cascade in rat pancreatic acini. Treatment of acini with both low (pM) and high (nM) concentrations of CCK was associated with an increase in cAMP-dependent protein kinase activity. The increases in kinase activity were detected in the absence of phosphodiesterase inhibition, a condition required to detect a measurable increase in cellular cAMP in these cells. Furthermore, the cAMP cascade was dissociated from the secretory effects of CCK, since the CCK analogue, OPE, mediates enzyme secretion but does not increase cellular cAMP levels or kinase activity.
authors.affiliation: Department of Medicine, Yale University School of Medicine, New Haven, CT 06510.
authors.forename: C R
authors.initials: CR
authors.lastname: Marino
authors.forename: S D
authors.initials: SD
authors.lastname: Leach
authors.forename: J F
authors.initials: JF
authors.lastname: Schaefer
authors.forename: L J
authors.initials: LJ
authors.lastname: Miller
authors.forename: F S
authors.initials: FS
authors.lastname: Gorelick
mesh_terms: D015056:1-Methyl-3-isobutylxanthine / Q000494:pharmacology; D000818:Animals; D002766:Cholecystokinin / Q000494:pharmacology*; D000242:Cyclic AMP / Q000502:physiology; D004789:Enzyme Activation / Q000187:drug effects; D066298:In Vitro Techniques; D008297:Male; D010179:Pancreas / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D011494:Protein Kinases / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D002766:Cholecystokinin; D000242:Cyclic AMP; D011494:Protein Kinases; D015056:1-Methyl-3-isobutylxanthine