Genetics of novelty seeking, amphetamine self-administration and reinstatement using inbred rats

A. C. Meyer, S. Rahman, R. J. Charnigo, L. P. Dwoskin, J. C. Crabbe, M. T. Bardo

Research output: Contribution to journalArticlepeer-review

35 Scopus citations

Abstract

Previous research using outbred rats indicates that individual differences in activity in a novel environment predict sensitivity to the reinforcing effect of psychostimulant drugs. The current study examined if the link between responses related to novelty and amphetamine self-administration is heritable. Twelve inbred rat strains were assessed for locomotor activity in a novel environment, preference for a novel environment, and intravenous amphetamine self-administration (acquisition, extinction and amphetamine-induced reinstatement). Strain differences were observed in activity in a novel environment, novelty preference and amphetamine self-administration, indicating a genetic influence for each of these behaviors. While there was no relation between activity in an inescapable novel environment and amphetamine self-administration, strain-dependent differences in novelty preference were positively correlated with the amount of amphetamine self-administered. There was also a positive correlation between the dose-dependent rate of amphetamine self-administration and magnitude of reinstatement. These results show that the activity in an inescapable novel environment and the preference for a novel environment are different genetically, and thus likely to reflect different behavioral constructs. Moreover, these results implicate a genetic influence on the relation between novelty seeking and stimulant self-administration, as well as on the relation between stimulant reward and reinstatement.

Original languageEnglish (US)
Pages (from-to)790-798
Number of pages9
JournalGenes, Brain and Behavior
Volume9
Issue number7
DOIs
StatePublished - Oct 2010

Keywords

  • Addiction
  • Amphetamine
  • Genetics
  • Novelty seeking
  • Rat
  • Self-administration

ASJC Scopus subject areas

  • Genetics
  • Neurology
  • Behavioral Neuroscience

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