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Assessment of the aversive and rewarding effects of alcohol in Fischer and Lewis rats.
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- Author(s): Roma, Peter G.; Flint, Wesley W.; Higley, J. Dee; Riley, Anthony L.
- Source:
Psychopharmacology. Dec2006, Vol. 189 Issue 2, p187-199. 13p. 7 Graphs. - Source:
- Additional Information
- Subject Terms:
- Abstract: Application of the Fischer–Lewis genetic model of drug abuse to the study of alcohol’s motivational properties has been limited. To assess the aversive and rewarding effects of ethanol in Fischer and Lewis rats. Fischer and Lewis rats underwent a four-trial combined conditioned taste aversion/conditioned place preference procedure (CTA/CPP; 0, 1, 1.25, or 1.5 g/kg IP ethanol). Others received 0, 1, or 1.5 g/kg followed by tail blood sampling at 15-, 60- and 180-min post-injection. In additional groups, hypothermia to 0, 1.5, and 3 g/kg was assessed before and 30- and 60-min post-injection. All alcohol-treated groups except low-dose Lewis acquired CTA after one trial. Fischer rats developed stronger CTAs than Lewis at 1.25 and 1.5 g/kg. Ethanol-induced reward in taste or place conditioning was not evident in either strain. Lewis animals showed overall higher peak blood alcohol concentrations, but hypothermia did not vary by strain. Compared to Fischer, Lewis rats are less sensitive to alcohol’s aversive effects as assessed in the CTA paradigm. The behavioral differences observed are not due to hypothermia, but pharmacokinetic differences may contribute. These data underscore the importance of genetic factors and the aversive effects of initial drug exposures in modeling vulnerability to abuse. In addition to its application with other drugs, the Fischer–Lewis model may be useful for investigating the biobehavioral bases of alcohol abuse. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Psychopharmacology is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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