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Tetrahydro-beta-carboline may produce its stimulus effects via 5HT1B receptors.

To further clarify the role of 5-hydroxytryptamine (5HT) in the behavioral effects of tetrahydro-beta-carboline, male rats were trained to discriminate either 20 mg/kg THBC from its vehicle (n = 10) or 2.0 mg/kg fenfluramine from saline (n = 5). THBC…

Tags: 1987, Animals, Carbolines/*pharmacology, Discrimination Learning/drug effects, Inbred Strains, Male, Metergoline/pharmacology, Pharmacology, biochemistry, and behavior, Piperazines/pharmacology, Rats, Receptors, Schechter M D, Serotonin Antagonists/pharmacology, Serotonin/*metabolism

Functional consequences of fenfluramine neurotoxicity.

Male Sprague-Dawley rats were trained to discriminate the anorectic drug d,l-fenfluramine (2.0 mg/kg intraperitoneally administered) from its vehicle using a food-motivated (fixed-ratio 10 schedule) two-lever operant task. Once trained, doses of 0.5,…

Tags: 1990, Animals, Conditioning, Discrimination Learning/drug effects, Dose-Response Relationship, Drug, Fenfluramine/*toxicity, Inbred Strains, Male, Nervous System Diseases/*chemically induced/psychology, Operant/drug effects, Pharmacology, biochemistry, and behavior, Rats, Reinforcement Schedule, Schechter M D

Effect of learned behavior upon conditioned place preference to cathinone.

The purpose of this study was to examine whether first training rats to discriminate the stimulus cues produced by an indirect dopamine agonist, cathinone, would influence a subsequent test of preference. The conditioned place preference (CPP)…

Tags: 1991, Alkaloids/*pharmacology, Animals, Antipsychotic Agents/pharmacology, Conditioning, Cues, Discrimination (Psychology)/drug effects, Discrimination Learning/drug effects, Dopamine/drug effects, Dopamine/physiology, Inbred Strains, Learning/*physiology, Male, Operant/*drug effects, Pharmacology, biochemistry, and behavior, Rats, Receptors, Schechter M D, Thiazepines/pharmacology

Dopaminergic nature of acute cathine tolerance.

Cathine is a psychoactive constituent in the leaves of the Khat shrub which are habitually ingested for their stimulatory effects in many parts of the world. Rats were trained to discriminate the stimulus effect of intraperitoneally administered 4.8…

Tags: 1990, Alkaloids/pharmacology, Animals, Antipsychotic Agents/pharmacology, Appetite Depressants/*pharmacology, Discrimination (Psychology)/drug effects, Discrimination Learning/drug effects, Dopamine/*physiology, Dose-Response Relationship, Drug, Drug Tolerance, Generalization (Psychology)/drug effects, Inbred Strains, Male, Pharmacology, biochemistry, and behavior, Phenylpropanolamine/*pharmacology, Rats, Schechter M D, Thiazepines/pharmacology

Inverse agonist properties of the FG 7142 discriminative stimulus.

A two-lever, food-motivated discrimination was established between the benzodiazepine receptor partial inverse agonist FG 7142 (5.0 mg/kg) and its vehicle. The FG 7142 discriminative stimulus was pharmacologically characterized by testing trained…

Tags: 1991, Animals, Appetite Depressants/*pharmacology, Carbolines/antagonists & inhibitors/*pharmacology, Discrimination (Psychology)/*drug effects, Discrimination Learning/drug effects, Dose-Response Relationship, Drug, GABA-A/drug effects, Generalization, Inbred Strains, Leidenheimer N J, Male, Pharmacology, biochemistry, and behavior, Rats, Receptors, Reinforcement Schedule, Schechter M D, Stimulus/drug effects

Possible serotonergic and dopaminergic mediation of the

Eight male rats previously trained to discriminate 2.0 mg/kg

MDMA (Ecstasy) substitutes for the ethanol discriminative cue in HAD but not LAD rats.

Selectively bred high- and low-alcohol-drinking (HAD/LAD) rats were trained to discriminate the interoceptive stimuli produced by IP-administered 600 mg/kg ethanol (10% w/v in a two-lever, food-motivated operant task. Once criterion discrimination…

Discriminative stimulus properties of CGS 10746B: similarity to dopamine D1 receptor antagonists.

CGS 10746B is an imidazole-derivative related to the atypical antipsychotic clozapine which produces a decrease in dopamine release without altering dopamine metabolism or occupying D2 receptors. Rats were trained on an appetitively-motivated,…

Biphasic effects of ethanol tested with drug discrimination in HAD and LAD rats.

Seventh-generation selectively bred high-alcohol-drinking (HAD) and low-alcohol-drinking (LAD) rats were trained to make differential responses for ethanol (0.75 g/kg, IP) and saline vehicle, following postadministration intervals (PI) of 2 min…

Tags: 1992, Alcohol Drinking/genetics/*psychology, Animals, Discrimination (Psychology)/*drug effects, Discrimination Learning/drug effects, Dose-Response Relationship, Drug, Ethanol/*pharmacology, Inbred Strains, Krimmer E C, Male, Pentobarbital/pharmacology, Pharmacology, biochemistry, and behavior, Rats, Serotonin Antagonists/pharmacology, Sleep/drug effects, Time Factors, Tropanes/pharmacology

Effect of altering dopamine or serotonin neurotransmitters upon cathinone discrimination.

Rats were trained to discriminate between the stimulus properties of 0.8 mg/kg l-cathinone and its vehicle in a two-lever, food-motivated operant task. Once trained, rats showed a dose-related decrease in discriminative performance when tested with…

Direct microinjection of cathinone into the rat brain produces discriminative stimuli.

Rats were trained to discriminate IP administration of 800 micrograms/kg cathinone using a food-motivated, two-lever discrimination procedure. Following training, 800 micrograms/kg cathinone discrimination was produced (generalized) by lower…

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