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Am J Physiol Regul Integr Comp Physiol 246: R829-R831, 1984;
0363-6119/84 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 246, Issue 5 829-R831, Copyright © 1984 by American Physiological Society

ARTICLES

Vagotomy does not alter cholecystokinin's inhibition of sham feeding

F. S. Kraly

Verified bilateral abdominal vagotomy (with hepatic branch intact) did not alter the ability of 20% pure cholecystokinin (CCK) or octapeptide of cholecystokinin (CCK-8) to inhibit sham feeding of liquid diet in dose-response studies for male Sprague-Dawley rats with open gastric fistula. In light of previous reports that 1) abdominal vagotomy blocks the satiety effect of exogenous CCK-8 on real feeding in intact rats and 2) inhibition of sham feeding requires seemingly supraphysiological doses of exogenous CCK or CCK-8, these findings show that the inhibition of sham feeding by CCK and the inhibition of real feeding by CCK are different. This limits the utility of the sham-feeding preparation for examining mechanisms for the satiety action of CCK.


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S. Eisen, R. J. Phillips, N. Geary, E. A. Baronowsky, T. L. Powley, and G. P. Smith
Inhibitory effects on intake of cholecystokinin-8 and cholecystokinin-33 in rats with hepatic proper or common hepatic branch vagal innervation
Am J Physiol Regulatory Integrative Comp Physiol, August 1, 2005; 289(2): R456 - R462.
[Abstract] [Full Text] [PDF]


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