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  • Title: Expression of c-Fos protein in the brain after intravenous injection of ghrelin in rats.
    Author: Takayama K, Johno Y, Hayashi K, Yakabi K, Tanaka T, Ro S.
    Journal: Neurosci Lett; 2007 May 07; 417(3):292-6. PubMed ID: 17433545.
    Abstract:
    In this study, we surveyed central neurons that might be activated after peripheral administration of a gut-brain peptide ghrelin, by examining neurons expressing c-Fos protein. First, we examined the relationship between the dose of ghrelin and the amount of gastric acid secreted. Ghrelin induced a significant increase in the amount of gastric acid secretion in a dose-dependent manner. Secondly, we examined central neurons that expressed c-Fos protein after intravenous injection of ghrelin. We found that intravenously injected ghrelin induced the neural expression of c-Fos protein in several nuclei and circumventricular organs in the brain. These results suggest that ghrelin released into the circulation may stimulate central neurons that have some role in the control mechanism for gastric acid secretion.
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