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  • Title: Effects of ghrelin on food intake and neuroendocrine function in sheep.
    Author: Sugino T, Hasegawa Y, Kurose Y, Kojima M, Kangawa K, Terashima Y.
    Journal: Anim Reprod Sci; 2004 Jul; 82-83():183-94. PubMed ID: 15271452.
    Abstract:
    Ghrelin, a novel acylated peptide, is the endogenous ligand for growth hormone secretagogue (GHS) receptor. Ghrelin is produced mainly in the oxyntic glands of the stomach, but also produced in the intestines, kidneys, hypothalamus and pituitary gland. Circulating ghrelin levels have been shown to rise before a meal and fall afterwards, suggesting that anticipation of a meal may stimulate secretion. In some species, ghrelin administration has been shown to stimulate growth hormone (GH) secretion, and to cause weight gain by increasing food intake and reducing metabolic utilization of fat. Furthermore, intracerebroventricular and intravascular administration of ghrelin increases gastric acid output in a dose-dependent manner. Thus, ghrelin may play an important role in controlling feeding behavior and energy homeostasis. We have investigated the role of ghrelin in the control of feeding and neuroendocrine function in ruminants using sheep as an experimental model. This mini review describes mechanisms regulating ghrelin secretion at feeding time, and also focuses on the neuroendocrine functions of ghrelin.
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