Plasma secretin, CCK, and pancreatic secretion in response to dietary fat in the rat.

Published

Journal Article

The role of fat in regulation of pancreatic secretion was studied in conscious rats by measuring pancreatic secretion and plasma cholecystokinin (CCK) and secretin responses to intraluminal infusion of fat, protein, or trypsin inhibitor via the duodenum. In rats with pancreatic juice continuously returned to the intestine, intraduodenal infusion of 20% emulsified fat (Liposyn), 10% casein, and 0.4% ovomucoid trypsin inhibitor (OMTI) stimulated equivalent increases of approximately threefold in pancreatic protein output. Proglumide reduced fat-stimulated pancreatic protein secretion by greater than 90% but did not inhibit the response to OMTI. Fat significantly increased plasma CCK from basal levels of 0.5 pM to 2-3 pM, but it was a weaker stimulant of CCK secretion than casein (peak CCK levels greater than 10 pM) or OMTI (peak CCK levels 5-6 pM). Fat significantly stimulated secretin release (21.7 pM) compared with casein (6.8 pM), OMTI (4.4 pM), and NaCl (3.5 pM). The inhibition of fat-stimulated pancreatic secretion by proglumide indicates that the small amounts of CCK released by fat are necessary for a normal pancreatic response, suggesting that this response may be the result of potentiation between secretin and small amounts of CCK.

Full Text

Duke Authors

Cited Authors

  • Green, GM; Taguchi, S; Friestman, J; Chey, WY; Liddle, RA

Published Date

  • June 1989

Published In

Volume / Issue

  • 256 / 6 Pt 1

Start / End Page

  • G1016 - G1021

PubMed ID

  • 2735407

Pubmed Central ID

  • 2735407

International Standard Serial Number (ISSN)

  • 0002-9513

Digital Object Identifier (DOI)

  • 10.1152/ajpgi.1989.256.6.G1016

Language

  • eng

Conference Location

  • United States