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Related Experiment Videos

Genetic differences in nicotine-induced conditioned taste aversion

F O Risinger1, M M Brown

  • 1Department of Medical Psychology, Oregon Health Sciences University, Portland, 97201-3098, USA.

Life Sciences
|January 1, 1996
PubMed
Summary

Genetic differences significantly impact nicotine-induced conditioned taste aversion in mice. This study reveals distinct responses across inbred strains, highlighting the role of genetics in aversion learning.

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Area of Science:

  • Neuroscience
  • Genetics
  • Pharmacology

Background:

  • Conditioned taste aversion (CTA) is a learned response to a flavor paired with an aversive stimulus.
  • Nicotine, a primary component of tobacco, has known aversive properties.
  • Understanding genetic influences on CTA can inform addiction research.

Purpose of the Study:

  • To investigate the impact of genetic background on nicotine-induced CTA.
  • To compare the aversion responses to nicotine across different inbred mouse strains.

Main Methods:

  • Inbred adult male mice (C57BL/6J, DBA/2J, BALB/cJ, C3H/heJ) were used.
  • Mice were exposed to a flavor followed by nicotine injections at varying doses (0.5, 1.0, 2.0 mg/kg).
  • Intake of the flavored solution was measured to assess aversion development.

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Main Results:

  • DBA/2J and C3H/heJ mice exhibited dose-dependent aversions to the nicotine-paired flavor.
  • BALB/cJ mice showed minimal aversion, while C57BL/6J mice displayed no significant CTA.
  • Genetic factors strongly modulate nicotine's aversive motivational effects.

Conclusions:

  • Genotype is a critical determinant of nicotine-induced CTA.
  • Observed genetic sensitivities/insensitivities in mice align with previous findings for ethanol's aversive effects.