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Am J Physiol Regul Integr Comp Physiol 254: R628-R632, 1988;
0363-6119/88 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 254, Issue 4 628-R632, Copyright © 1988 by American Physiological Society

ARTICLES

Gastric and nongastric mechanisms for satiety action of cholecystokinin

T. H. Moran and P. R. McHugh
Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

The quantitative relationship between cholecystokinin's (CCK) inhibitory actions on gastric emptying and feeding was examined in rats. CCK (1, 2, 4, or 8 micrograms/kg) inhibited both the gastric emptying (determined by the dye dilution method) and ingestion of a 0.5-kcal/ml glucose solution in a 30-min testing period in 20-h deprived male Sprague-Dawley rats. Comparisons of the inhibitions of gastric emptying and feeding across the dose range of CCK revealed two components of CCK satiety: one defined by a linear relationship between the gastric inhibitory and feeding inhibitory actions of CCK through a dose range of 1-4 micrograms/kg, which accounted for 64% of the variability in the satiety action of CCK, and a second that appeared to be independent of the gastric inhibitory action of CCK.


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