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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

CGS 10746B is able to attenuate the effects of amphetamine: further evidence for dopaminergic mediation.

Previous results indicate that agents which either decreases synthesis or block postsynaptic dopamine receptors will attenuate the discriminative stimulus produced by d-amphetamine. CGS 10746B has been reported to decrease dopamine release without…

Tags: 1988, Alkaloids/pharmacology, Animals, Antipsychotic Agents/*pharmacology, Apomorphine/pharmacology, Boja J W, Cocaine/pharmacology, Conditioning, Dextroamphetamine/antagonists & inhibitors/*pharmacology, Discrimination (Psychology)/*drug effects, Dopamine/*physiology, Dose-Response Relationship, Drug, Male, Operant/drug effects, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Thiazepines/*pharmacology

Cocaethylene produces discriminative stimulus properties in the rat: effect of cocaine and ethanol coadministration.

Experimentally naive Sprague-Dawley male rats were trained to discriminate the interoceptive stimulus cues produced by either 10.0 mg/kg cocaine or 10.0 mg/kg cocaethylene from their saline vehicles. Although it required more sessions to train the…

Tags: 1995, Animals, Cocaine/*analogs & derivatives/pharmacokinetics/*pharmacology, Discrimination (Psychology)/*drug effects, Dose-Response Relationship, Drug, Ethanol/pharmacokinetics/*pharmacology, Male, Pharmacology, biochemistry, and behavior, Rats, Reinforcement Schedule, Schechter M D, Sprague-Dawley

Cocaine discrimination is attenuated by isradipine and CGS 10746B.

The discriminative stimulus properties of cocaine are thought to be mediated by dopaminergic mechanisms that may be modulated by calcium ion influx and/or interact with 5-hydroxytryptamine3 (5-HT3) receptors. To test these possibilities, rats were…

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…

Discriminative stimulus effect of phenylephrine.

Rats were trained to discriminate phenylephrine in a two-lever, food-motivated operant task by increasing the i.p. administered training dose from 0.8 to 2 mg/kg. Stable discrimination to 2 mg/kg phenylephrine was established and testing of 0.5-2.5…

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,…

Drug-drug discrimination: stimulus properties of drugs of abuse upon a serotonergic-dopaminergic continuum.

Ten male N/Nih rats were trained to discriminate between the interoceptive cues produced by the purportedly dopaminergically-mediated drug d-amphetamine at 0.4 mg/kg intraperitoneally administered 20 min prior to training and those produced by the…

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…

Effect of repeated administrations upon cathinone discrimination and conditioned place preference.

1. Eight male rats were trained to discriminate the interoceptive cues produced by 0.8 mg/kg l-cathinone in a two-lever, food-motivated operant task and they were, subsequently, tested for preference to cathinone in a conditioned place preference…

Tags: 1991, Alkaloids/*pharmacology, Animals, Conditioning, Department of Anatomy & Neurobiology, Discrimination (Psychology)/*drug effects, Drug Tolerance/physiology, General pharmacology, Inbred Strains, Male, McBurney D, NEOMED College of Medicine, Operant/*drug effects, Psychotropic Drugs/*pharmacology, Rats, Schechter M D

Effect of serotonin depletion by p-chlorophenylalanine upon discriminative behaviours.

1. Para-chlorophenylalanine (p-CPA), a competitive inhibitor of the serotonin (5-HT) synthesis enzyme tryptophan hydroxylase, was administered to rats at a dosage (100 mg/kg daily for 3 days) that depletes 5-HT. 2. Different groups of these rats were…

Tags: 1991, Animals, Brain Chemistry/drug effects, Central Nervous System Stimulants/pharmacology, Discrimination (Psychology)/*drug effects, Dopamine/physiology, Fenclonine/*pharmacology, General pharmacology, Inbred Strains, Male, Rats, Schechter M D, Serotonin Antagonists/*pharmacology, Serotonin/*physiology

Evidence for noradrenergic involvement in mediating the FG 7142 discriminative stimulus.

Rats were trained to discriminate the stimulus properties of the benzodiazepine receptor partial inverse agonist beta-carboline-3-carboxylate acid methyl amide (FG 7142) (5.0 mg/kg) or the alpha 2-adrenergic receptor antagonist 17…

Increased drug sensitivity in the drug discrimination procedure afforded by drug versus drug training.

Rats were trained to discriminate norfenfluramine (NF) 1.4 mg/kg from its vehicle or amphetamine (AMPH) 0.8 mg/kg or pentobarbital (PB) 6.0 mg/kg in order to determine the role that drug combination training plays in the rate of learning and…

Tags: 1990, Amphetamine/pharmacology, Animals, Boja J W, Discrimination (Psychology)/*drug effects, Discrimination Learning/*drug effects, Dose-Response Relationship, Drug, Inbred Strains, Male, Norfenfluramine/pharmacology, Pentobarbital/pharmacology, Psychopharmacology, Rats, Reinforcement Schedule, Schechter M D

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

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…

Norfenfluramine, the fenfluramine metabolite, provides stimulus control: evidence for serotonergic mediation.

Nine male rats were trained to discriminate 1.4 mg/kg norfenfluramine (NF) from its vehicle using a two-lever, food-motivated, operant discrimination task. Once trained, the rats showed a dose-dependent decrease in responding on the

Tags: 1988, Animal/*drug effects, Animals, Behavior, Boja J W, Discrimination (Psychology)/*drug effects, Dose-Response Relationship, Drug, Fenfluramine/*analogs & derivatives/*pharmacology, Inbred Strains, Male, Norfenfluramine/*pharmacology, Pharmacology, biochemistry, and behavior, Rats, Receptors, Schechter M D, Serotonin/pharmacology, Serotonin/physiology, Time Factors

Potentiation of cathinone by caffeine and nikethamide.

The drug discrimination paradigm was employed to evaluate the effect of coadministration of both caffeine and nikethamide upon the discrimination of a low dose of cathinone. In rats trained to discriminate between 0.8 mg/kg l-cathinone and its…

Tags: 1989, Alkaloids/*pharmacology, Animals, Caffeine/*pharmacology, Discrimination (Psychology)/*drug effects, Drug Combinations/pharmacology, Drug Synergism, Inbred Strains, Male, Nikethamide/*pharmacology, Pharmacology, biochemistry, and behavior, Phenylpropanolamine/pharmacology, Psychotropic Drugs/*pharmacology, Rats, Salicylates/pharmacology, Schechter M D

Serotonergic-dopaminergic mediation of 3,4-methylenedioxymethamphetamine (MDMA, "ecstasy").

A series of three experiments were conducted to investigate the possible serotonergic and dopaminergic mediation of the discriminative stimulus properties of the "designer" drug MDMA. In Experiment 1, rats trained to discriminate 1.5 mg/kg (+/-)-MDMA…

Temporal parameters of cathinone, amphetamine and cocaine.

Rats were trained to discriminate intraperitoneally administered 0.8 mg/kg

Tags: 1989, Alkaloids/*pharmacology, Amphetamines/*pharmacology, Animals, Cocaine/*pharmacology, Conditioning, Discrimination (Psychology)/*drug effects, Inbred Strains, Male, Operant/*drug effects, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Task Performance and Analysis, Time Factors

Time-dependent effect of ethanol upon discrimination behavior.

The discriminative stimulus properties produced by ethanol were employed to demonstrate differences in discriminative performance over time in rats trained at different postinjection times. Thus, one group of rats was trained to discriminate between…

Tags: 1989, Alcohol (Fayetteville, N.Y.), Animals, Discrimination (Psychology)/*drug effects, Dose-Response Relationship, Drug, Ethanol/*pharmacology, Inbred Strains, Male, Rats, Schechter M D, Time Factors

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