Sensitization to the Stimulant Motor Effects of Ethanol Is Not Dependent On Tolerance to Ataxic or Sedative Properties of Ethanol in Female MiceRémi Legastelois*, Béatrice Botia and Mickaël Naassilaa
INSERM ERi 24, Groupe de Recherche sur l’Alcool et les Pharmacodépendances (GRAP), Université de Picardie Jules Verne, C.U.R.S. (Centre Universitaire de Recherche en Santé), Chemin du Thil, Amiens, France
- *Corresponding Author:
- Mickaël Naassilaa
INSERM ERI 24, GRAP
Université de Picardie Jules Verne
C.U.R.S. (Centre Universitaire de Recherche en Santé)
Chemin du Thil, 80025 Amiens cedex 1, France
Tel: +33 322-827-758
E-mail: [email protected]
Received date: July 09, 2015; Accepted date: August 06, 2015; Published date: August 10, 2015
Citation: Legastelois R, Botia B, Naassilaa M (2015) Sensitization to the Stimulant Motor Effects of Ethanol Is Not Dependent On Tolerance to Ataxic or Sedative Properties of Ethanol in Female Mice. J Alcohol Drug Depend 3:216. doi: 10.4172/23296488.1000216
Copyright: © 2015 Legastelois R et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Ethanol (EtOH)-induced behavioral sensitization (EIBS) is defined as an enhancement of locomotor activity following repeated EtOH exposure and is proposed to reflect an increase in EtOH “wanting”. However, the reliability of the sensitization model in studying addiction is still a matter of debate. One major criticism is that the increase in locomotion occurring during sensitization may be a by-product of tolerance to the ataxic and/or sedative effects of EtOH. We investigated the relationship between EIBS amplitude and sensitivity to EtOH-induced ataxia and sedation after the development of tolerance to EtOH depressant effects in adult female DBA/2J mice. After receiving daily injection of saline or 2 g/kg EtOH during 10 consecutive days to induce EIBS, recovery from acute motor incoordination produced by ethanol (2 g/kg EtOH using rotarod) and from loss of righting reflex (4 g/kg EtOH) was measured. We showed that induction of EtOH sensitization after repeated administration of EtOH is associated with a more rapid recovery from acute motor incoordination and from sedation produced by ethanol when compared to the acute groups, suggesting the development of tolerance to the ataxic and sedative effects of EtOH. However, correlational analyses failed to detect any relationship between EIBS amplitude and the response to EtOH ataxic or sedative effects. Altogether, our results confirm and extend previous data showing a tolerance to the ataxic and sedative properties of EtOH after repeated exposure to EtOH and suggest that this tolerance is not related to the amplitude of EIBS.