Reduction of ethanol intake by corticotropin-releasing factor receptor-1 antagonist in "heavy-drinking" mice in a free-choice paradigm

Psychopharmacology
Diego CorreiaRoseli Boerngen-Lacerda

Abstract

We hypothesized that the corticotropin-releasing factor (CRF) system is hyperresponsive in animals with high ethanol intake, which exhibits a reduction of ethanol intake when administered with a CRF1 receptor antagonist. Outbred Swiss mice were subjected to a long-term, three-bottle, free-choice paradigm (5 and 10 % [v/v] ethanol and water) that consisted of four phases: acquisition (AC; 10 weeks), withdrawal (W; 2 weeks), reexposure (RE; 2 weeks), and quinine-adulteration (AD; 2 weeks). Based on individual ethanol intake, the mice were classified into three groups: A group, preference for ethanol and persistently high consumption during AD phase; B group, preference for ethanol and a reduction of ethanol intake in the AD phase; and C group; preference for water during all phases. A control group only had access to water. CRF1 receptor messenger RNA (mRNA) levels in the amygdala and the effect of the CRF1 receptor antagonist CP-154,526 on ethanol and water intake in the subgroups were studied. CRF1 transcript levels were higher in the B group than in the control group. The highest dose of CP-154,526 reduced ethanol intake and preference, with no changes in water consumption, in the A group compared with vehicle. The B group exh...Continue Reading

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Citations

Nov 8, 2016·Frontiers in Endocrinology·Isabel Marian Hartmann QuadrosCristiane Aparecida Favoretto
Jan 10, 2019·Frontiers in Psychology·Angélica Torres-BerrioMauricio O Nava-Mesa
Jun 29, 2016·Brain Plasticity·Arnauld BelmerSelena E Bartlett
May 28, 2017·Journal of Neural Transmission·Andrea Frozino RibeiroAngela Maria Ribeiro

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