Browse Items · NEOMED Bibliography Database

Modulation of olfactory bulb tyrosine hydroxylase and catecholamine transporter mRNA by estrogen.

Since estrogen exerts wide ranging effects within the central nervous system, it is important to investigate the sites and actions of this gonadal steroid hormone at extra-hypothalamic locations. In the present report, the effects of estrogen upon…

Methamphetamine-gonadal steroid hormonal interactions: effects upon acute toxicity and striatal dopamine concentrations.

Methamphetamine (MA)-related deaths and nigrostriatal dopaminergic (NSDA) neurotoxicity are greater in males. The exact basis for this gender difference is not known, but data, which show that estrogen (E) can function as a protectant of both the…

MDMA-like stimulus effects of hallucinogens in male Fawn-Hooded rats.

A two-lever, food-motivated, operant technique was employed to train the purportedly serotonergically dysfunctional Fawn-Hooded (FH) rat to discriminate 1.5 mg/kg MDMA. Once all 10 male subjects learned the MDMA-vehicle discrimination at criterion…

Markers associated with testosterone enhancement of methamphetamine-induced striatal dopaminergic neurotoxicity.

Intact male CD-1 mice received an injection of testosterone propionate (TP–5 ug), progesterone (P–5 mg), the oil vehicle or remained untreated (control). At 24 hours after hormonal treatments the mice received an injection of methamphetamine (MA–40…

LSD produces conditioned place preference in male but not female fawn hooded rats.

Male and female Fawn Hooded rats were examined for conditioned place preference (CPP) or aversion (CPA) to lysergic acid diethylamide (LSD). Using a biased design, experimental animals were trained with LSD (0.2 mg/kg, I.P.) administered in…

Tags: *Cues, *Sex Characteristics, 1998, Analysis of Variance, Animals, Choice Behavior/*drug effects, Conditioning, Female, Humans, Inbred Strains, Lysergic Acid Diethylamide/*pharmacology, Male, Meehan S M, Operant/*drug effects, Pharmacology, biochemistry, and behavior, Rats, Schechter M D

Lack of neuroleptic-like activity of l-fenfluramine.

Rats were trained to differentiate between the dopaminergically mediated discriminative stimuli produced by intraperitoneal administration of 4.8 mg/kg cathine and its vehicle. Once trained, three doses of l-fenfluramine (1.0, 2.0 and 2.5 mg/kg) were…

Tags: 1991, Animals, Antipsychotic Agents/*pharmacology, Cues, Discrimination (Psychology)/drug effects, Dopamine Agents/pharmacology, Dopamine Antagonists, Fenfluramine/*pharmacology, Inbred Strains, Male, Pharmacology, biochemistry, and behavior, Phenylpropanolamine/pharmacology, Rats, Schechter M D

Lack of generalization of nisoxetine with amphetamine in the rat.

Rats were trained to discriminate between the stimulus properties of intraperitoneally administered d-amphetamine (0.8 mg/kg) and its vehicle in a two-lever, food-motivated operant task. Once trained, doses of the norepinephrine reuptake inhibiting…

Tags: *Discrimination (Psychology), 1988, Animals, Boja J W, Conditioning, Dextroamphetamine/*pharmacology, Dose-Response Relationship, Drug, Fluoxetine/*analogs & derivatives/pharmacology, Inbred Strains, Male, Norepinephrine/antagonists & inhibitors, Operant/*drug effects, Pharmacology, biochemistry, and behavior, Rats, Reference Values, Schechter M D

Inverse agonist properties of the THBC discriminative stimulus: asymmetrical generalization with FG 7142.

Male rats were trained to discriminate the stimulus properties of the beta-carbolines 1,2,3,4-tetrahydro-beta-carboline (THBC) (15.0 mg/kg) or FG 7142 (5.0 mg/kg) from vehicle in a two-lever, food-motivated operant task. Consistent with the…

Tags: 1991, Animals, Avoidance Learning/drug effects, Carbolines/antagonists & inhibitors/*pharmacology, 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, Schechter M D, Stimulus/*drug effects

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

Interaction of ethanol and tetrahydro-beta-carboline (THBC) in a discriminative task.

Rats (n = 10) were trained to discriminate between ethanol (600 mg/kg, IP) and its vehicle, or between THBC (20 mg/kg) and its vehicle in a two-lever food-motivated operant task. Once the discriminative training criterion was attained, rats in each…

Tags: 1988, Alcohol (Fayetteville, N.Y.), Animal/drug effects, Animals, Behavior, Carbolines/*pharmacology, Conditioning (Psychology)/drug effects, Discrimination Learning/*drug effects, Dose-Response Relationship, Drug, Drug Interactions, Ethanol/*pharmacology, Inbred Strains, Male, Rats, Schechter M D, Signs S A

Innervation of regenerated spindles in muscle grafts of the rat.

Features of the nerve supply and the encapsulated fibers of muscle spindles were assessed in grafted and normal extensor digitorum longus (EDL) muscles of rats by analysis of serial 10-microns frozen transverse sections stained for enzymes which…

Inhibition of rat brain pyruvate dehydrogenase by thiamine analogs.

The effects of thiamine thiazolone (TT) and thiamine thiazolone pyrophosphate (TTPP) on the in vitro and in vivo inhibition of pyruvate dehydrogenase complex (PDHC) from rat cortex and hippocampus were characterized. TTPP decreased PDHC activity in…

Tags: 1988, Animals, Biochemical pharmacology, Brain/*enzymology, Cerebral Cortex/drug effects/enzymology, Hippocampus/drug effects/enzymology, Inbred Strains, Kandiko C T, Kinetics, Male, Pyruvate Dehydrogenase Complex/*antagonists & inhibitors, Rats, Smith D, Thiamine Pyrophosphate/analogs & derivatives/pharmacology, Thiamine/*analogs & derivatives/pharmacology, Yamamoto B K

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

In vivo neurochemical and anatomical heterogeneity of the dopamine uptake system in the rat caudate putamen.

The neurochemical and anatomical heterogeneity of dopamine uptake blockade was studied at a medial and lateral position in each of 3 rostrocaudal areas of the rat caudate-putamen. In vivo voltammetric measures of extracellular dopamine indicated a…

Tags: 1989, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animals, Brain research, Caudate Nucleus/drug effects/*metabolism, Dopamine/*metabolism, Electrochemistry, Glynn G E, Homovanillic Acid/metabolism, Inbred Strains, Indoles/*pharmacology, Male, Mazindol/*pharmacology, Neurotransmitter Uptake Inhibitors/*pharmacology, Nomifensine/*pharmacology, Putamen/drug effects/*metabolism, Rats, Yamamoto B K

Genetic selection for nicotine activity in mice correlates with conditioned place preference.

Genetically heterogenous stock (HS) mice are being used to develop lines which have differential locomotor response to subcutaneously administered (0.75 mg/kg) nicotine. These groups of nicotine-depressed, nicotine-activated or randomly bred control…

Tags: *Conditioning, 1995, Analysis of Variance, Animals, European journal of pharmacology, Female, Inbred Strains, Male, Meehan S M, Mice, Movement/*drug effects, Nicotine/*pharmacology, Operant, Schechter J B, Schechter M D

Gender differences in methamphetamine-induced mRNA associated with neurodegeneration in the mouse nigrostriatal dopaminergic system.

In this report female and male CD-1 mice were treated with a neurotoxic regimen of methamphetamine (MA) to compare gender differences in striatal dopamine depletion and concordant changes in mRNA markers of the transforming growth factor-beta injury…

Further evidence for the mechanisms that may mediate nicotine discrimination.

Rats were trained to discriminate the interoceptive stimuli produced by subcutaneously administered 0.4 mg/kg nicotine in a two-lever, food-motivated, operant task. Once criterion performance was attained, dose-response experiments indicated an ED50…

Tags: 1992, Animals, Calcium Channel Blockers/pharmacology, Dihydropyridines/pharmacology, Discrimination Learning, Dopamine/*metabolism, Dose-Response Relationship, Drug, Inbred Strains, Indoles/pharmacology, Isradipine, Male, Meehan S M, Nicotine/administration & dosage/*pharmacology, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Thiazepines/pharmacology, Tropisetron

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

Extinction of cocaine-induced place approach in rats: a validation of the "biased" conditioning procedure.

It has often been demonstrated that when a rat is conditioned in a cue-specific environment that has been repeatedly paired with cocaine injections, it will spend more time in that environment than it does in a saline-paired environment. This…

Tags: 1993, Animals, Brain research bulletin, Calcagnetti D J, Classical, Cocaine/*pharmacology, Conditioning, Extinction, Habituation, Inbred Strains, Male, Operant/*drug effects, Psychological/*drug effects, Psychophysiologic/drug effects, Rats, Reward, Schechter M D

Estrogen alters MPTP-induced neurotoxicity in female mice: effects on striatal dopamine concentrations and release.

The effects of estrogen on MPTP-induced neurotoxicity of the nigrostriatal dopaminergic system were examined in C57Bl and CD-1 mice. Ovariectomized mice with and without estrogen were treated with MPTP or its vehicle. The effects of these treatments…

Tags: *MPTP Poisoning, 1996, 3, 4-Dihydroxyphenylacetic Acid/metabolism, Animals, Corpus Striatum/*drug effects/*metabolism, Dluzen D E, Dopamine/*metabolism, Estradiol/*pharmacology, Female, Inbred C57BL, Inbred Strains, Journal of neurochemistry, Levodopa/pharmacology, Liu B, McDermott J L, Mice, Osmolar Concentration, Ovariectomy

Effects of cathinone and amphetamine on the neurochemistry of dopamine in vivo.

The effects of (-)cathinone, the primary psychoactive alkaloid of the Khat plant, were compared to those of (+)amphetamine in the anterior caudate-putamen and the nucleus accumbens. In vivo microdialysis was used to measure extracellular levels of…

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

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 MDMA neurotoxicity upon its conditioned place preference and discrimination.

Experiments were conducted to investigate the functional consequences of a neurotoxic regimen of MDMA administration upon two behaviors, conditioned place preference and drug discrimination. Rats were trained to discriminate 1.5 mg/kg MDMA from its…

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

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…

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

Discriminative stimulus properties of CGS 9896: interactions within the GABA/benzodiazepine receptor complex.

Male rats were trained to discriminate the stimulus effects of CGS 9896 (30.0 mg/kg) from its vehicle. Once trained, discriminative performance was observed to be dose-responsive in the 3.75-30.0 mg/kg range and analysis of the dose-response curve…

Discriminative stimulus properties of (+)cathine, an alkaloid of the khat plant.

The effects of the psychostimulant (+)cathine (norpseudoephedrine) were examined in a two-choice, food-motivated, drug-discrimination paradigm. Rats were able to discriminate cathine from vehicle and this effect was dose- and time-dependent. Prior…

Tags: *Discrimination (Psychology)/drug effects, 1990, Alkaloids/*pharmacology, Animals, Catha, Domperidone/pharmacology, Drug Administration Schedule, Drug Tolerance, Haloperidol/pharmacology, Inbred Strains, Male, Pehek E A, Pharmacology, biochemistry, and behavior, Phenylpropanolamine/antagonists & inhibitors/*pharmacology, Plant Extracts/analysis, Psychotropic Drugs/*pharmacology, Rats, Schechter M D

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 control by the anxiogenic beta-carboline FG 7142: generalization to a physiological stressor.

Drug discrimination was employed to investigate the similarities between FG

Tags: 1988, Animals, Appetite Depressants/*pharmacology, Avoidance Learning/drug effects, Carbolines/*pharmacology, Discrimination Learning/*drug effects, Generalization, Inbred Strains, Leidenheimer N J, Male, Pharmacology, biochemistry, and behavior, Physiological/*psychology, Rats, Schechter M D, Stimulus/*drug effects, Stress

Discriminative effects of cocaethylene in rats trained to discriminate cocaine or ethanol.

Two groups of rats were trained to discriminate between the stimulus properties of either intraperitoneally administered 10.0 mg/kg cocaine or 60 mg/kg ethanol and its vehicle in a two-lever operant chamber. Once trained, both groups exhibited a…

Tags: 1994, Animals, Cocaine/*analogs & derivatives/*pharmacology, Discrimination Learning/*drug effects, Dose-Response Relationship, Drug, Drug Interactions, Ethanol/*pharmacology, Inbred Strains, Life sciences, Male, Rats, Schechter M D

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…

Development of potentiation in the dentate gyrus of rat: physiology and anatomy.

The physiological development of potentiating processes in the rat dentate gyrus were compared to morphological development. Rapid Golgi techniques were coupled with in vitro studies of dentate granule cell frequency potentiation, post-tetanic…

Tags: 1978, Animals, Brain research bulletin, Duffy C J, Female, Hippocampus/anatomy & histology/growth & development/*physiology, In Vitro Techniques, Inbred Strains, Male, Rats, Teyler T J

Development of habituation in the dentate gyrus of rat: physiology and anatomy.

The physiological development of monosynaptic response habituation in the rat dentate gyrus was compared to morphological development. Rapid Golgi techniques were coupled with in vitro studies of dentate granule cell habituation to several…

Tags: 1978, Animals, Brain research bulletin, Duffy C J, Female, Habituation, Hippocampus/anatomy & histology/physiology, Inbred Strains, Male, Psychophysiologic/*physiology, Rats, Synapses/physiology, Teyler T J

Deficits in shock-induced freezing and naltrexone enhancement of freezing in fawn hooded rats.

When a rat is returned to a context associated with mild electric foot shock (1 mA/0.75 s), the environmental cues elicit a species-specific defensive behavior termed freezing. Genetically divergent strains of rats given identical shock conditioning…

Tags: *Fear, 1994, Animals, Brain research bulletin, Calcagnetti D J, Classical/*drug effects, Conditioning, Electroshock, Female, Inbred Strains, Naltrexone/*pharmacology, Rats, Schechter M D

Conditioned place preference/aversion to fenfluramine in fawn hooded and sprague-Dawley rats.

The Fawn Hooded (FH) rat strain possesses a genetic platelet storage pool deficiency which leads to an impaired capacity for platelets to store and release serotonin. While the relationship between this deficit and possible alterations in brain…

Tags: 1994, Animals, Avoidance Learning/*drug effects, Blood Platelets/metabolism, Brain Chemistry/genetics, Fenfluramine/*pharmacology, Habituation, Inbred Strains, Meehan S M, Platelet Storage Pool Deficiency/physiopathology, Progress in neuro-psychopharmacology & biological psychiatry, Psychophysiologic/drug effects, Rats, Schechter M D, Serotonin/metabolism/physiology, Species Specificity, Sprague-Dawley

Conditioned place aversion following the central administration of a novel dopamine release inhibitor CGS 10746B.

Numerous drugs of abuse that elevate brain extracellular dopamine concentrations by either increasing the firing rate of dopaminergic neurons or producing dopamine release have been shown to reliably condition a preference for place. If dopamine…

Tags: 1991, Animals, Antipsychotic Agents/administration & dosage/*pharmacology, Avoidance Learning/*drug effects, Calcagnetti D J, Dopamine/*metabolism, Inbred Strains, Injections, Intraventricular, Male, Motor Activity/*drug effects, Pharmacology, biochemistry, and behavior, Rats, Schechter M D, Thiazepines/administration & dosage/*pharmacology

Comparison of anorectic drugs in rats trained to discriminate between satiation and deprivation.

Eight male rats were trained to discriminate between the internal states produced by food deprivation of 3 hours (satiation) and that produced by food deprivation of 27 hours duration (deprivation). One lever, in a two-lever operant chamber, had to…

Tags: *Food Deprivation, 1990, Amphetamine/*pharmacology, Analysis of Variance, Animals, Discrimination Learning/*drug effects, Dose-Response Relationship, Drug, Fenfluramine/*analogs & derivatives/*pharmacology, Inbred Strains, Life sciences, Male, Norfenfluramine/*pharmacology, Rats, Satiation/*drug effects, Schechter M D

Cocaethylene-induced lethality in mice is potentiated by alcohol.

Mice of the heterogeneously bred HS line were concurrently administered intraperitoneal injections of either 95, 75, 60, or 48 mg/kg cocaethylene or 48, 38, or 30 mg/kg cocaethylene in conjunction with the non-lethal dose of 6.0 g/kg (20% w/v)…

Tags: 1995, Alcohol (Fayetteville, N.Y.), Animals, Cocaine/*analogs & derivatives/poisoning, Dose-Response Relationship, Drug, Drug Synergism, Ethanol/*pharmacology, Female, Inbred Strains, Lethal Dose 50, Male, Meehan S M, Mice, Schechter M D

Browse Items (97 total)