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The role of hypothalamic peptide gene expression in alcohol self-administration behavior.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Neuroscience.
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2007 (English)In: Peptides, ISSN 0196-9781, E-ISSN 1873-5169, Vol. 28, no 12, 2361-2371 p.Article in journal (Refereed) Published
Abstract [en]

Self-administration of ethanol and food share many common features and Richter hypothesized that an increase in ethanol consumption would decrease feeding to balance the excess calories contained in the ethanol. Previously, we have shown that individual alcohol consumption correlates with neurotransmitter gene expression, especially in the prefrontal cortex. To test the hypothesis of Richter, we measured hypothalamic gene expression of receptors or neuropeptides of known relevance for the regulation of food intake using qPCR and correlated this to individual ethanol consumption in Wistar rats. For validation, gene expression was first correlated with body weight. We found a correlation of dynorphin, somatostatin, melanocortin-4 receptor and serotonin 5-HT2C with body weight and trends to correlation for CART, thus confirming the established role of the hypothalamus in the regulation of weight. For ethanol consumption, correlations were found for CRH receptors I and 2 and vasopressin while strong trends were observed for galanin receptor 1, orexin receptor 1, MCH and adrenoceptor alpha(1B). Therefore, alcohol consumption does seem to involve several hypothalamic systems which also mediate feeding responses and suggests that the hypothalamus, together with the prefrontal cortex, may determine the 'stopping point' of an individual.

Place, publisher, year, edition, pages
2007. Vol. 28, no 12, 2361-2371 p.
Keyword [en]
ethanol, hypothalamus, CRH, galanin, orexin, qPCR, functional genomics, Wistar rat, individual
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-16275DOI: 10.1016/j.peptides.2007.09.011ISI: 000251698000014PubMedID: 17976860OAI: oai:DiVA.org:uu-16275DiVA: diva2:44046
Available from: 2008-05-15 Created: 2008-05-15 Last updated: 2017-12-08Bibliographically approved

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