Related Experiment Videos
Acute sensitivity vs. context-specific sensitization to cocaine as a function of genotype
G I Elmer1, D A Gorelick, S R Goldberg
1Behavioral Pharmacology and Genetics, National Institute on Drug Abuse, National Institutes on Health, Baltimore, MD 21224, USA.
Pharmacology, Biochemistry, and Behavior
|March 1, 1996
Summary
Genetic factors influence how individuals respond to cocaine. This study found that cocaine
Area of Science:
- Neuroscience
- Pharmacology
- Behavioral Genetics
Background:
- Individual differences in response to psychostimulants are partly genetic.
- Sensitization to chronic stimulant effects is a key area of research.
- Understanding variability in cocaine effects is crucial for treatment strategies.
Purpose of the Study:
- To investigate genetic influences on cocaine sensitization using a locomotor activity model.
- To examine the relationship between acute cocaine sensitivity and chronic sensitization.
- To assess genotype-dependent differences in cocaine's behavioral effects.
Main Methods:
- Utilized six inbred mouse strains to assess acute cocaine sensitivity and context-dependent sensitization.
- Measured locomotor activity as a behavioral endpoint for cocaine's effects.
- Administered equiactive doses of cocaine paired with specific environments (test apparatus vs. home colony).
Main Results:
- Significant genetic variability was observed in both acute cocaine potency and efficacy.
- Context-specific sensitization to cocaine was dependent on time, environment, and mouse genotype.
- The degree of sensitization was not directly correlated with acute sensitivity to cocaine's locomotor effects.
Conclusions:
- Acute cocaine-induced locomotor activity and context-specific sensitization represent distinct pharmacological properties.
- Genetic factors play a significant role in shaping individual responses to chronic cocaine exposure.
- Environmental context is a critical modulator of cocaine sensitization, interacting with genotype.