Withdrawal from repeated treatment with amphetamine reduces novelty-seeking behavior and enhances environmental habituation in mice

Withdrawal from repeated treatment with amphetamine reduces novelty-seeking behavior and enhances environmental habituation in mice

Author Fukushiro, Daniela F. Google Scholar
Mari-Kawamoto, Elisa Google Scholar
Aramini, Tatiana C. F. Google Scholar
Saito, Luis P. Google Scholar
Costa, Jacqueline M. Google Scholar
Josino, Fabiana S. Google Scholar
Frussa-Filho, Roberto Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Anhedonia associated with a dysphoric state is an important feature of amphetamine withdrawal in humans. We aimed to investigate the effects of amphetamine withdrawal on two motivation-related behaviors in mice: novelty seeking and environmental habituation. Because anxiety can interfere with the behavioral outcome of other tasks, amphetamine-withdrawn mice were also evaluated in the elevated plus maze. Swiss male mice (three months old) were treated with 2.0 mg/kg amphetamine for 13 days, every other day, in their home cages (a total of seven injections). Twenty-four hours after withdrawal from drug treatment, mice were tested in a free-choice novelty apparatus containing one familiar and one novel compartment or in the elevated plus maze. Novelty-seeking behavior was assessed by comparing the time spent in the novel compartment vs. the familiar compartment, whereas environmental habituation was concomitantly evaluated by the time-response curve of total locomotion (novel + familiar). Novelty seeking was decreased during amphetamine withdrawal, and this result was not associated with changes in the anxiety-like behavior of mice. Additionally, amphetamine withdrawal enhanced environmental habituation. the concomitant decrease in novelty seeking and the increase in environmental habituation seem to be related to amphetamine withdrawal-induced anhedonia. Thus, the model proposed here could be used as a tool for the study of mechanisms and potential treatment of the anhedonic behavioral consequences of psychostimulant withdrawal. (C) 2011 Elsevier Inc. All rights reserved.
Keywords Amphetamine
Environmental habituation
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundo de Apoio ao Docente e Aluno (FADA)
Associacao Fundo de Pesquisa em Psicobiologia (AFIP)
Date 2011-11-01
Published in Pharmacology Biochemistry and Behavior. Oxford: Pergamon-Elsevier B.V., v. 100, n. 1, p. 180-184, 2011.
ISSN 0091-3057 (Sherpa/Romeo, impact factor)
Publisher Elsevier B.V.
Extent 180-184
Origin http://dx.doi.org/10.1016/j.pbb.2011.08.015
Access rights Closed access
Type Article
Web of Science ID WOS:000296302400025
URI http://repositorio.unifesp.br/handle/11600/34197

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