Inhibition of sucrose intake by continuous celiac, superior mesenteric, and intravenous CCK-8 infusions

James E. Cox, Steven M. Mccown, Jonathan M. Bridges, William J. Tyler

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Two experiments compared the potency of continuous infusions of cholecystokinin octapeptide (CCK-8) for reducing sucrose intake when administered into abdominal arteries or the jugular vein. Adult, male Sprague-Dawley rats received 22-min infusions of saline or several doses of CCK-8. Sucrose was available for 20 min, beginning 2 min after onset of infusions. In the first experiment, intraceliac CCK-8 in doses of 50, 125, and 312 ng produced significant reductions in intake, but no dose affected intake when administered into the jugular vein. In experiment 2, only the highest dose, 312 ng, suppressed intake when infused into the superior mesenteric artery, and jugular infusions were again ineffective. Behavioral observations indicated that intra-arterial CCK-8 had no affect on feeding within the first several minutes of test meals but accelerated the subsequent decline in incidence of feeding. These results suggest that receptors involved in cholecystokinin satiety are widely distributed within the gastrointestinal tract.

Original languageEnglish (US)
Pages (from-to)R319-R325
JournalAmerican Journal of Physiology - Regulatory Integrative and Comparative Physiology
Volume270
Issue number2 39-2
DOIs
StatePublished - 1996
Externally publishedYes

Keywords

  • cholecystokinin octapeptide
  • gastrointestinal tract
  • rat
  • satiety

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)

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