Cholecystokinin Activates a Variety of Intracellular Signal Transduction Mechanisms in Rodent Pancreatic Acinar Cells
dc.contributor.author | Williams, John A. | en_US |
dc.contributor.author | Dolors Sans, M. | en_US |
dc.contributor.author | Tashiro, Mitsuo | en_US |
dc.contributor.author | Schäfer, Claus | en_US |
dc.contributor.author | Bragado, M. Julia | en_US |
dc.contributor.author | Dabrowski, Andrzej | en_US |
dc.date.accessioned | 2010-06-01T19:25:16Z | |
dc.date.available | 2010-06-01T19:25:16Z | |
dc.date.issued | 2002-12 | en_US |
dc.identifier.citation | Williams, John A.; Dolors Sans, M.; Tashiro, Mitsuo; SchÄfer, Claus; Bragado, M. Julia; Dabrowski, Andrzej (2002). "Cholecystokinin Activates a Variety of Intracellular Signal Transduction Mechanisms in Rodent Pancreatic Acinar Cells." Pharmacology & Toxicology 91(6): 297-303. <http://hdl.handle.net/2027.42/72562> | en_US |
dc.identifier.issn | 0901-9928 | en_US |
dc.identifier.issn | 1600-0773 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/72562 | |
dc.description.abstract | Cholecystokinin (CCK) acting through its G protein-coupled receptor is now known to activate a variety of intracellular signaling mechanisms and thereby regulate a complex array of cellular functions in pancreatic acinar cells. The best studied mechanism is the coupling through heterotrimeric G proteins of the G q family to activate a phospholipase C leading to an increase in inositol trisphosphate and release of intracellular Ca 2+ . This pathway along with protein kinase C activation in response to the increase in diacylglycerol stimulates the secretion of digestive enzymes by the process of exocytosis. CCK also activates signaling pathways in acini more related to other processes. The three mitogen activated protein kinase cascades leading to ERKs, JNKs and p38 MAPK are all activated by CCK. CCK activates the ERK cascade by PKC activation of Raf which in turn activates MEK and ERKs. JNKs are activated by a distinct mechanism whish requires higher concentrations of CCK. Both ERKs and JNKs are presumed to regulate gene expression. CCK activation of p38 MAPK also plays a role in regulating the actin cytoskeleton through phosphorylation of the small heat shock protein HSP27. The PI3K-PKB-mTOR pathway is activated by CCK and plays a major role in regulating protein synthesis at the translational level. This includes both activation of p70 S6K leading to phosphorylation of ribosomal protein S6 and the phosphorylation of the binding protein for initiation factor 4E leading to formation of the mRNA cap binding complex. Other signaling pathways activated by CCK receptors include NF-κB and a variety of tyrosine kinases. Further work is needed to understand how CCK receptors activate most of the above pathways and to better understand the biological events regulated by these diverse signaling pathways. | en_US |
dc.format.extent | 164495 bytes | |
dc.format.extent | 3109 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Munksgaard International Publishers | en_US |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.rights | © Pharmacology & Toxicology 2002 | en_US |
dc.title | Cholecystokinin Activates a Variety of Intracellular Signal Transduction Mechanisms in Rodent Pancreatic Acinar Cells | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Pharmacy and Pharmacology | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.identifier.pmid | 12688372 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/72562/1/j.1600-0773.2002.910606.x.pdf | |
dc.identifier.doi | 10.1034/j.1600-0773.2002.910606.x | en_US |
dc.identifier.source | Pharmacology & Toxicology | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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