Involvement of the GABAA Receptor in Age-Dependent Differences in Binge-Like Ethanol Intake

Alcoholism, Clinical and Experimental Research
Caroline Quoilin, Stephen L Boehm

Abstract

Binge alcohol (ethanol [EtOH]) drinking is common during adolescence, a time characterized by many behavioral and neurobiological changes. Among them, the GABAA receptor system undergoes substantial modifications, including changes in the density, distribution, and subunit composition of the receptor. Based on its demonstrated role in EtOH consumption, this study aimed to investigate the effects of 2 different GABAA receptor agonists on binge-like EtOH intake in adolescent and adult mice using the Drinking-in-the-Dark model. Three hours into their dark cycle, adolescent (postnatal day 28 [P28]) and adult (P63) male C57BL/6J mice were given daily access to 20% EtOH for 2 hours during 8 consecutive days. Immediately before the access on day 8, mice (P35 and P70) were systemically injected with 1 of 2 different GABAergic drugs. The effects of muscimol, a full GABAA agonist, were assessed in a first experiment. The second experiment tested for the more specific involvement of δ-containing extrasynaptic GABAA receptors through the administration of THIP (4,5,6,7-tetrahydroisoxazolo(5,4-c)pyridin-3-ol). Adolescent mice consumed more EtOH than their adult counterparts. Following the administration of GABAA agonists, levels of EtOH int...Continue Reading

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Citations

Dec 21, 2016·Alcoholism, Clinical and Experimental Research·Christina L RubyH Scott Swartzwelder
Jun 15, 2017·Alcoholism, Clinical and Experimental Research·Nicholas J JuryAndrew Holmes
Jan 1, 2016·Journal of Drug and Alcohol Research·Anna N BukiyaAlex M Dopico

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