Abstract:
:The effects of a specific cholecystokinin (CCK) receptor antagonist (L364,718) and a gastrin receptor antagonist (L365,260) on gastrin-releasing peptide-10 (GRP-10)-stimulated pancreatic secretion were investigated in the anesthetized rat. GRP-10 stimulated pancreatic exocrine secretion in a dose-dependent manner. A dose of 1.0 nmol/kg/h elicited a significant increase in pancreatic protein output. L364,718 (2.0 mg/kg/h), at a dose that completely inhibited the stimulatory effect of exogenous CCK-8 (3.0 nmol/kg/h) on pancreatic secretion, did not suppress the excitatory effect of GRP-10. L365,260 (5.0 mg/kg/h), at a dose that completely inhibited the stimulatory effect of exogenous gastrin (20 micrograms/kg/h) on gastric acid secretion, did not suppress the excitatory effect of GRP-10 either. We concluded that CCK or gastrin do not mediate the excitatory mechanism of bombesin/GRP on pancreatic secretion. Since CCK and gastrin are the most probable candidates for excitatory mediator of bombesin/GRP, these results support the hypothesis that bombesin/GRP directly stimulates the exocrine pancreas in the rat.
journal_name
Pancreasjournal_title
Pancreasauthors
Terashima H,Debas HT,Bunnett NWdoi
10.1097/00006676-199203000-00013subject
Has Abstractpub_date
1992-01-01 00:00:00pages
212-9issue
2eissn
0885-3177issn
1536-4828journal_volume
7pub_type
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