Abstract
This study examined the effect of repeated ethanol (EtOH) injections that induced behavioral sensitization on subsequent acquisition of EtOH- and lithium chloride (LiCl)-induced conditioned taste aversion (CTA). CTA acquisition was assessed in independent groups of EtOH-sensitized and nonsensitized genetically heterogeneous female mice after injections of saline; 1, 2, or 4 g/kg EtOH; or 2 or 4 mEq/kg LiCl. Saline and 1 g/kg EtOH did not induce CTA. Four g/kg EtOH and 4 mEq/kg LiCl induced similar levels of CTA in EtOH-sensitized and nonsensitized groups. CTA induced by 2 g/kg EtOH and 2 mEq/kg LiCl was attenuated in EtOH-sensitized mice compared with nonsensitized counterparts. Thus, a sensitizing regimen of EtOH preexposure resulted in both a decrease in EtOH and LiCl aversion and an increase in EtOH locomotor sensitivity; such changes could ultimately contribute to enhanced EtOH intake and potentially to EtOH abuse.
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