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  • Title: Luminal bile regulates cholecystokinin release in conscious rats.
    Author: Nakamura R, Miyasaka K, Kuyama Y, Kitani K.
    Journal: Dig Dis Sci; 1990 Jan; 35(1):55-60. PubMed ID: 2295295.
    Abstract:
    The effects of intraluminal bile on cholecystokinin release and pancreatic exocrine secretion were studied in conscious rats. Since it has been suggested that bile acid may influence pancreatic secretion indirectly by interacting with luminal protease activities, intraduodenal protease activities were eliminated by pancreatic juice diversion accompanied with simultaneous intraduodenal infusion of aprotinin. This treatment resulted in gradual increases in pancreatic juice flow, bicarbonate and protein outputs, and an increase in plasma cholecystokinin levels, reaching plateau levels 2 hr after the start of the treatment. When endogenous bile was excluded from the intestine, the pancreatic secretion and plasma cholecystokinin concentrations further increased. The intraduodenal infusion of sodium taurocholate during bile pancreatic juice diversion inhibited cholecystokinin release, while pancreatic protein output was only transiently decreased. The results indicate that bile in the duodenum directly regulates cholecystokinin release, probably through its major components, bile salts.
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