Involvement of Endogenous Opioid Mechanisms in the Interaction Between Stress and Ethanol

Overview

Journal Psychopharmacology (Berl)

Specialty Pharmacology

Date 1991 Jan 1

PMID 2057542

Citations 2

Authors

L E Trudeau

C M Aragon

Z Amit

Affiliations

Soon will be listed here.

Abstract

The involvement of endogenous opioid mechanisms in the interaction between stress and ethanol was investigated in the rat. Animals were pretreated with naltrexone (10 mg/kg) or saline 3 h before a second injection consisting of ethanol (1.0 g/kg) or saline. They were then restrained for 15 or 60 min or left in home cages for an equivalent amount of time. After restraint, animals were either subjected to an open-field test or decapitated to collect blood for corticosterone determinations. Locomotor depression was found to be induced by 15 but not 60 min restraint. In naltrexone-treated animals, however, 60 min restraint was also found to induce locomotor depression. Ethanol pretreatment was found to block the locomotor depression induced by 15 min restraint. Such an interaction was in turn antagonized by naltrexone. In the 15 min condition, stress and ethanol were also found to interact in their effects on plasma levels of corticosterone. Naltrexone did not alter any effects of the stressors on corticosterone levels. These results provide support for the involvement of endogenous opioid mechanisms in the interaction of stress and ethanol at a behavioural level.

Citing Articles

Alcohol administration blocks stress-induced impairments in memory and anxiety, and alters hippocampal neurotransmitter receptor expression in male rats.

Gomez J, Lewis M, Sebastian V, Serrano P, Luine V Horm Behav. 2013; 63(4):659-66.

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Locomotor sensitization to EtOH: contribution of β-Endorphin.

Dempsey S, Grisel J Front Mol Neurosci. 2012; 5:87.

PMID: 22952458 PMC: 3430006. DOI: 10.3389/fnmol.2012.00087.

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