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CCK-B receptor anta...
CCK-B receptor antagonist YF476 inhibits pancreatic enzyme secretion at a duodenal level in pigs
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- Evilevitch, Lena (author)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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- Weström, Björn (author)
- Lund University,Lunds universitet,Funktionell zoologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Functional zoology,Department of Biology,Faculty of Science
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- Pierzynowski, Stefan (author)
- Lund University,Lunds universitet,Funktionell zoologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Functional zoology,Department of Biology,Faculty of Science
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(creator_code:org_t)
- 2009-07-08
- 2004
- English.
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In: Scandinavian Journal of Gastroenterology. - : Informa UK Limited. - 1502-7708 .- 0036-5521. ; 39:9, s. 886-890
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http://dx.doi.org/10...
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Abstract
Subject headings
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- Background: To evaluate the mechanisms by which cholecystokinin (CCK) regulates the exocrine pancreas, the role and location of CCK receptors in the pig were investigated using the CCK-B receptor antagonist YF476 and different administration routes of CCK. Methods: In 11 anaesthetized pigs, catheters were surgically implanted in the pancreatic duct for juice collection, and in the gastric arteries and jugular vein, so that infusions of CCK-33 could be directed to the duodenal/gastric, duodenal/ pancreatic or general circulations, respectively. Experiments were performed under control conditions, and after pretreatment by gavage feeding with YF476, using either a single, low dose of 0.3 mumol kg(-1), which would block the CCK-B receptors, or a 1000 times higher dose (300 mumol kg(-1)), which would also block the CCK-A receptors. Results: The increase in the pancreatic output of protein and the enzymes trypsin and amylase observed after the infusion of CCK-33 at 13 pmol kg(-1) to the duodenum/stomach or duodenum/pancreas was inhibited by pretreatment with YF476 at both dosages. In contrast, the increase in protein and enzyme output after the infusion of a supraphysiological dose of CCK-33 (130 pmol kg(-1)) to the general circulation was not affected by pretreatment with low dosage YF476, whereas high dosage YF476 completely inhibited the stimulated secretion. Conclusions: These data indicate that CCK-33 given locally to the duodenum in doses raising CCK to physiological plasma levels stimulates the pancreatic enzyme secretion via duodenal CCK-B receptors. Supra-physiological doses of CCK-33 to the general circulation appeared to affect the pancreatic enzyme secretion via CCK-A receptors located elsewhere than in the pancreatic and duodenal tissue.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Gastroenterologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Gastroenterology and Hepatology (hsv//eng)
Keyword
- exocrine pancreas
- CCK-receptors
- entero-pancreatic reflex
- pig
- trypsin
Publication and Content Type
- art (subject category)
- ref (subject category)
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