Central neuropeptide Y modulates binge-like ethanol drinking in C57BL/6J mice via Y1 and Y2 receptors

TitleCentral neuropeptide Y modulates binge-like ethanol drinking in C57BL/6J mice via Y1 and Y2 receptors
Publication TypeJournal Article
Year of Publication2012
AuthorsSparrow AM, Lowery-Gionta EG, Pleil KE, Li C, Sprow GM, Cox BR, Rinker JA, Jijon AM, Peňa J, Navarro M, Kash TL, Thiele TE
JournalNeuropsychopharmacology
Volume37
Issue6
Pagination1409-21
Date Published2012 May
ISSN1740-634X
KeywordsAlcohol Drinking, Amygdala, Analysis of Variance, Animals, Arginine, Central Nervous System Depressants, Conditioning, Operant, Dose-Response Relationship, Drug, Ethanol, Gene Expression Regulation, In Vitro Techniques, Inhibitory Postsynaptic Potentials, Injections, Intraventricular, Male, Mice, Mice, Inbred C57BL, Neurons, Neuropeptide Y, Peptide Fragments, Receptors, Neuropeptide Y
Abstract

Frequent binge drinking has been linked to heart disease, high blood pressure, type 2 diabetes, and the development of ethanol dependence. Thus, identifying pharmaceutical targets to treat binge drinking is of paramount importance. Here we employed a mouse model of binge-like ethanol drinking to study the role of neuropeptide Y (NPY). To this end, the present set of studies utilized pharmacological manipulation of NPY signaling, immunoreactivity (IR) mapping of NPY and NPY receptors, and electrophysiological recordings from slice preparations of the amygdala. The results indicated that central infusion of NPY, a NPY Y1 receptor (Y1R) agonist, and a Y2R antagonist significantly blunted binge-like ethanol drinking in C57BL/6J mice (that achieved blood ethanol levels >80 mg/dl in control conditions). Binge-like ethanol drinking reduced NPY and Y1R IR in the central nucleus of the amygdala (CeA), and 24 h of ethanol abstinence after a history of binge-like drinking promoted increases of Y1R and Y2R IR. Electrophysiological recordings of slice preparations from the CeA showed that binge-like ethanol drinking augmented the ability of NPY to inhibit GABAergic transmission. Thus, binge-like ethanol drinking in C57BL/6J mice promoted alterations of NPY signaling in the CeA, and administration of exogenous NPY compounds protected against binge-like drinking. The current data suggest that Y1R agonists and Y2R antagonists may be useful for curbing and/or preventing binge drinking, protecting vulnerable individuals from progressing to the point of ethanol dependence.

DOI10.1038/npp.2011.327
Alternate JournalNeuropsychopharmacology
PubMed ID22218088
PubMed Central IDPMC3327846
Grant ListF31 AA017803 / AA / NIAAA NIH HHS / United States
U01 AA020911 / AA / NIAAA NIH HHS / United States
F31 AA019839 / AA / NIAAA NIH HHS / United States
AA019454 / AA / NIAAA NIH HHS / United States
K99 AA017668 / AA / NIAAA NIH HHS / United States
R37 AA013573 / AA / NIAAA NIH HHS / United States
AA017818 / AA / NIAAA NIH HHS / United States
AA019839 / AA / NIAAA NIH HHS / United States
R01 AA013573-08 / AA / NIAAA NIH HHS / United States
F31 AA017803-03 / AA / NIAAA NIH HHS / United States
AA017668 / AA / NIAAA NIH HHS / United States
F31 AA019839-03 / AA / NIAAA NIH HHS / United States
F31 AA017818-03 / AA / NIAAA NIH HHS / United States
AA017803 / AA / NIAAA NIH HHS / United States
AA013573 / AA / NIAAA NIH HHS / United States
R01 AA019454 / AA / NIAAA NIH HHS / United States
R01 AA015148 / AA / NIAAA NIH HHS / United States
AA015148 / AA / NIAAA NIH HHS / United States
R01 AA015148-06 / AA / NIAAA NIH HHS / United States
F31 AA017818 / AA / NIAAA NIH HHS / United States
R00 AA017668 / AA / NIAAA NIH HHS / United States
R01 AA013573 / AA / NIAAA NIH HHS / United States