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Am J Physiol Regul Integr Comp Physiol 261: R614-R618, 1991;
0363-6119/91 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 261, Issue 3 614-R618, Copyright © 1991 by American Physiological Society

ARTICLES

Satiating effect of bombesin is mediated by receptors perfused by celiac artery

T. C. Kirkham, J. Gibbs and G. P. Smith
Department of Psychiatry, Cornell University Medical College, New York 10021.

The abdominal site or sites for the satiety action of exogenous, peripherally administered bombesin (BN) were investigated. By use of a chronic arterial catheterization technique, the effects of 1, 2, and 4 micrograms/kg BN on liquid food intake of nondeprived male rats were assessed. Comparisons were made between the effects of these doses infused into the celiac or superior mesenteric arteries or injected intraperitoneally. The satiating potency of exogenous BN was significantly enhanced by direct administration into the celiac artery, which directly perfuses the stomach, pancreas, liver, spleen, and proximal duodenum. By this route, 4 micrograms/kg BN produced greater than 60% suppression of 15-min food intake. By contrast, BN infused into the superior mesenteric artery was no more effective than intraperitoneal injection. Celiac infusion of 1 micrograms/kg BN produced a suppression (30%) of intake that was equivalent to, or exceeded, that obtained after intraperitoneal injection or superior mesenteric infusion of 4 micrograms/kg. These results strongly support an upper abdominal, and possibly gastric, site for the satiety action of peripherally administered BN.


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