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Concentration-dependent conditioned place preference to inhaled toluene vapors in rats. 2006

Dianne E Lee, and Madina R Gerasimov, and Wynne K Schiffer, and Andrew N Gifford
Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA.

OBJECTIVE Toluene is present in many commercial products and is subject to abuse by inhalation. The goal of this study was to extend previous reports indicating that rats will exhibit a positive conditioned place preference to inhaled toluene vapors and to determine the dose-response relationship for inhaled toluene in terms of exposure concentration and number of exposures. For the conditioned place preference experiments rats were exposed to toluene vapors at concentrations of 800, 2000, 3000 or 5000 ppm in one compartment of a three-compartment box. RESULTS Following six conditioning sessions with toluene, a significant place preference was obtained at 2000 and 3000 ppm, but not at 800 or 5000 ppm. Extending the number of toluene pairings at the 2000 and 3000 ppm concentration to 12 significantly enhanced the place preference compared to that at six pairings. CONCLUSIONS These experiments extend our previous finding that rats will show a conditioned place preference to inhaled toluene, and indicate that a reinforcing "dose" of toluene depends on both the concentration and number of pairings.

UI MeSH Term Description Entries
D008297 Male Males
D002755 Choice Behavior The act of making a selection among two or more alternatives, usually after a period of deliberation. Approach Behavior,Approach Behaviors,Behavior, Approach,Behavior, Choice,Behaviors, Approach,Behaviors, Choice,Choice Behaviors
D003213 Conditioning, Psychological Simple form of learning involving the formation, strengthening, or weakening of an association between a stimulus and a response. Conditioning, Psychology,Psychological Conditioning,Social Learning Theory,Social Learning Theories,Theory, Social Learning
D004305 Dose-Response Relationship, Drug The relationship between the dose of an administered drug and the response of the organism to the drug. Dose Response Relationship, Drug,Dose-Response Relationships, Drug,Drug Dose-Response Relationship,Drug Dose-Response Relationships,Relationship, Drug Dose-Response,Relationships, Drug Dose-Response
D000280 Administration, Inhalation The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract. Drug Administration, Inhalation,Drug Administration, Respiratory,Drug Aerosol Therapy,Inhalation Drug Administration,Inhalation of Drugs,Respiratory Drug Administration,Aerosol Drug Therapy,Aerosol Therapy, Drug,Drug Therapy, Aerosol,Inhalation Administration,Administration, Inhalation Drug,Administration, Respiratory Drug,Therapy, Aerosol Drug,Therapy, Drug Aerosol
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D001522 Behavior, Animal The observable response an animal makes to any situation. Autotomy Animal,Animal Behavior,Animal Behaviors
D012997 Solvents Liquids that dissolve other substances (solutes), generally solids, without any change in chemical composition, as, water containing sugar. (Grant & Hackh's Chemical Dictionary, 5th ed) Solvent
D014050 Toluene A widely used industrial solvent.
D014835 Volatilization A phase transition from liquid state to gas state, which is affected by Raoult's law. It can be accomplished by fractional distillation. Vaporization,Volatility

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