This is an application to investigate the control of exocrine pancreatic function at the cellular and molecular level. It includes support for five projects and three core facilities. The first project on calcium and stimulus secretion coupling in pancreatic acinar cells (PI:J.A. Williams) is concerned with the steps by which acetylcholine acts on muscarinic receptors to mobilize cellular calcium as well as the mechanism by which the rise in cytoplasmic calcium leads to changes in protein phosphorylation and secretion of digestive enzymes. The second project on the regulation of pancreatic cells by insulin and islet hormone is concerned with the physiological regulation of exocrine function by islet hormones including insulin, glucagon, somatostatin and pancreatic polypeptide. It also studies the cellular mechanism of insulin action on acinar cells. The third project on the characterization of receptors for cholecystokinin on acinar cells is concerned with the isolation and characterization of CCK receptors, the long term regulation of CCK receptors and biological responses, and the use of pancreatic acini for a bioassay of CCK in plasma. The fourth project on hormonal regulation of pancreatic gene expression will analyze the expression of pancreas specific exocrine genes as well as specific membrane antigens. The fifth project on control of pancreatic fluid secretion will use isolated acinar and duct cells as well as reconstituted cellular monolayers to study the mechanism of secretion of pancreatic juice and its regulation by hormones and neurotransmitters. The support requested is for fundamental research, but the resultant knowledge will be relevant to the understanding of pancreatic diseases including cystic fibrosis, pancreatitus and cancer.

Project Start
1984-01-01
Project End
1988-12-31
Budget Start
1988-01-01
Budget End
1988-12-31
Support Year
5
Fiscal Year
1988
Total Cost
Indirect Cost
Name
University of California San Francisco
Department
Type
Schools of Medicine
DUNS #
073133571
City
San Francisco
State
CA
Country
United States
Zip Code
94143
Guthrie, J; Williams, J A; Logsdon, C D (1991) Growth and differentiation of pancreatic acinar cells: independent effects of glucocorticoids on AR42J cells. Pancreas 6:506-13
Bastie, M J; Williams, J A (1990) Gastrointestinal peptides activate Na(+)-H+ exchanger in AR42J cells by increasing its affinity for intracellular H+. Am J Physiol 258:G958-66
Lewis, L D; Williams, J A (1990) Regulation of cholecystokinin secretion by food, hormones, and neural pathways in the rat. Am J Physiol 258:G512-8
De Lisle, R C; Logsdon, C D (1990) Pancreatic acinar cells in culture: expression of acinar and ductal antigens in a growth-related manner. Eur J Cell Biol 51:64-75
De Lisle, R C; Grendell, J H; Williams, J A (1990) Growing pancreatic acinar cells (postpancreatitis and fetal) express a ductal antigen. Pancreas 5:381-8
Sung, C K; Williams, J A (1990) Cholecystokinin stimulates a specific ribosomal S6 kinase in rat pancreatic acini. Pancreas 5:668-76
Tsunoda, Y; Stuenkel, E L; Williams, J A (1990) Oscillatory mode of calcium signaling in rat pancreatic acinar cells. Am J Physiol 258:C147-55
Garry, D J; Garry, M G; Williams, J A et al. (1989) Effects of islet hormones on amylase secretion and localization of somatostatin binding sites. Am J Physiol 256:G897-904
Stuenkel, E L (1989) Single potassium channels recorded from vascular smooth muscle cells. Am J Physiol 257:H760-9
Matozaki, T; Williams, J A (1989) Multiple sources of 1,2-diacylglycerol in isolated rat pancreatic acini stimulated by cholecystokinin. Involvement of phosphatidylinositol bisphosphate and phosphatidylcholine hydrolysis. J Biol Chem 264:14729-34

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