title: Inhibitory effect of pancreastatin on pancreatic exocrine secretion in the conscious rat.
abstract: The effect of newly discovered pancreastatin on pancreatic secretion stimulated by a diversion of bile-pancreatic juice (BPJ) from the intestine was examined in the conscious rat. Exogenous pancreastatin infusion (20, 100 and 200 pmol/kg.h) inhibited pancreatic protein and fluid outputs during BPJ diversion in a dose-dependent manner. Pancreastatin did not affect plasma cholecystokinin (CCK) concentrations. Pancreastatin (100 pmol/kg.h) inhibited CCK-stimulated pancreatic secretion, but did not inhibit secretin-stimulated pancreatic secretion. Pancreastatin alone, however, did not affect basal pancreatic secretion. In contrast, pancreastatin (10(-10)-10(-7)M) did not suppress CCK-stimulated amylase release from isolated rat pancreatic acini. These results indicate that pancreastatin has an inhibitory action on exocrine function of the pancreas. This action may not be mediated by direct mechanisms and nor via an inhibition of CCK release. It is suggested that pancreastatin may play a role in the regulation of the intestinal phase of exocrine pancreatic secretion.
authors: National Kyushu Cancer Center, Fukuoka Japan.
authors: A
authors: A
authors: Funakoshi
authors: K
authors: K
authors: Miyasaka
authors: R
authors: R
authors: Nakamura
authors: K
authors: K
authors: Kitani
authors: K
authors: K
authors: Tatemoto
mesh_terms: D000681:Amylases / Q000378:metabolism; D000818:Animals; D002766:Cholecystokinin / Q000378:metabolism; D053379:Chromogranin A; D066298:In Vitro Techniques; D008297:Male; D010179:Pancreas / Q000187:drug effects* / Q000201:enzymology / Q000378:metabolism; D010187:Pancreatic Hormones / Q000494:pharmacology*; D051381:Rats; D011919:Rats, Inbred Strains; D012633:Secretin / Q000378:metabolism
chemical_list: D053379:Chromogranin A; D010187:Pancreatic Hormones; C050836:pancreastatin; D012633:Secretin; D002766:Cholecystokinin; D000681:Amylases