Document Detail


Effect of pancreastatin on cerulein-stimulated pancreatic blood flow and exocrine secretion in anaesthetized rats.
MedLine Citation:
PMID:  10385069     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
BACKGROUND: Pancreastatin (PST) is an inhibitor of pancreatic exocrine secretion in vivo but not in vitro, which suggests that the inhibitory effect of PST is indirect, that is, not mediated by a specific receptor on pancreatic acinar cells. In this study, we investigated the effects of PST on pancreatic exocrine secretion and local pancreatic blood flow in anaesthetized rats to elucidate the participation of PST in indirect regulation of pancreatic exocrine function through blood supply. METHODS: Pancreastatin (100, 200 or 500 pmol/kg per h) was administered intravenously under background infusion of cerulein (0.5 microg/kg per h), a cholecystokinin analogue. Pancreatic exocrine secretion was monitored by volume and protein output of the pancreatic juice and local pancreatic blood flow was measured by the hydrogen gas clearance method. RESULTS: Pancreastatin significantly reduced cerulein-induced local pancreatic blood flow in a dose-dependent manner. Pancreatic exocrine secretion was also reduced significantly by PST dose-dependently. Pancreastatin did not change systemic blood pressure. These results suggested that the reduction of pancreatic blood flow is associated with the reduction of pancreatic exocrine secretion. CONCLUSIONS: We conclude that the mechanism of PST-induced inhibition of pancreatic exocrine secretion is, at least, partly mediated by the reduction of local pancreatic blood flow through blockade, caused by the action of cerulein on pancreatic blood flow.
Authors:
Y Migita; I Nakano; M Goto; T Ito; H Nawata
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of gastroenterology and hepatology     Volume:  14     ISSN:  0815-9319     ISO Abbreviation:  J. Gastroenterol. Hepatol.     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-09-08     Completed Date:  1999-09-08     Revised Date:  2009-11-03    
Medline Journal Info:
Nlm Unique ID:  8607909     Medline TA:  J Gastroenterol Hepatol     Country:  AUSTRALIA    
Other Details:
Languages:  eng     Pagination:  583-7     Citation Subset:  IM    
Affiliation:
Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Blood Pressure / drug effects
Caerulein / antagonists & inhibitors,  pharmacology*
Dose-Response Relationship, Drug
Gastrointestinal Agents / antagonists & inhibitors,  pharmacology*
Male
Pancreas / blood supply,  drug effects*,  secretion*
Pancreatic Hormones / pharmacology*
Pancreatic Juice / secretion
Rats
Rats, Sprague-Dawley
Regional Blood Flow / drug effects
Chemical
Reg. No./Substance:
0/Gastrointestinal Agents; 0/Pancreatic Hormones; 106477-83-2/pancreastatin; 17650-98-5/Caerulein

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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