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Histamine controls food intake in sheep via H1 receptors

Lookup NU author(s): Professor Colin Ingram


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Histamine is a well known amine which controls many physiological functions of the CNS, including fluid balance, appetite, thermoregulation, cardiovascular control, learning and the stress response. All these functions are mediated via three well known membrane receptors (H1, H2 and H3) and, in laboratory animals, feeding behavior is under the control of H1 type. In order to investigate the central effect of histamine on feeding behavior in sheep and the characterization of the receptor involved, two Latin square design experiments were undertaken using four Iranian Nainee rams implanted with intracerebroventricular cannulae. In the first experiment, 12 h fasted (7:00 p.m.-7:00 a.m.) rams in individual pens were infused with 0 (control), 100, 400 and 800 nM of histamine such that each ram received each dose four times on different days. Ten minutes after injection (7:00 a.m.) water and a food container were put in the pens and the consumption of water and food were recorded at 0.5, 1, 3 and 12 h. Results from this experiment revealed that histamine significantly (P < 0.01) suppressed food intake with no effect on water consumption. In the second experiment the use of three specific histamine antagonists: chloropheniramine, ranitidine and thioperamide, showed that the anorexic effect of histamine was significantly (P < 0.01) blocked by chloropheniramine. It is concluded that feeding behavior in sheep is inhibited by histamine acting via H1 receptors. © 2006 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Rahmani HR, Ingram CD

Publication type: Article

Publication status: Published

Journal: Small Ruminant Research

Year: 2007

Volume: 70

Issue: 2-3

Pages: 110-115

Print publication date: 01/07/2007

ISSN (print): 0921-4488

ISSN (electronic):

Publisher: Elsevier


DOI: 10.1016/j.smallrumres.2006.01.010


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