Intralateral hypothalamic area injection of isoproterenol and propranolol affects food and water intake in broilers |
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Authors: | Ali Baghbanzadeh Mohammad Reza Hajinezhad Bahram Shohreh Reza Maleklou |
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Institution: | (1) Section of Physiology, Department of Basic Sciences, Faculty of Veterinary Medicine, University of Tehran, PO Box 14155-6453, Tehran, Iran |
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Abstract: | The role played by adrenergic system in water intake, especially food intake, has long been known in mammals. In avian species,
there have been many experiments exploring the effects of the adrenergic system in different sites in the central nervous
system in meat- and egg-type poultry. This study was designed to examine the possible effects of intralateral hypothalamic
area (ILHy) microinjections of a beta-adrenergic agonist, isoproterenol, and a beta-adrenoceptor blocker, propranolol, on
food and water intake in 3-h food-deprived and 3-h water-deprived broiler cockerels. Our findings suggest that the β-adrenergic
system directly affects food especially water intake in broilers. Although isoproterenol significantly (P ≤ 0.05) decreased food intake for the first 15 min, it reduced food intake during the experiment. Isoproterenol reduced water
intake significantly (P ≤ 0.05), which was abolished by pretreatment with propranolol. It is proposed that β-adrenoceptors in LHy play a direct and
indirect role in the regulation of food especially water intake in broiler cockerels. |
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