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Calcium channel blockade attenuates angiotensin II-induced drinking in rats.

Lateral ventricular administration of angiotensin II (ANG II) produces potent dipsogenic effects in water-sated rats. ANG II seems to require functional voltage-gated calcium channels on neurons throughout circumventricular brain sites to exert its…

Tags: 1993, Amino Acid Sequence, Angiotensin II/*antagonists & inhibitors/pharmacology, Animals, Brain research bulletin, Calcagnetti D J, Calcium Channel Blockers/administration & dosage/*pharmacology, Dimethyl Sulfoxide/pharmacology, Dose-Response Relationship, Drinking Behavior/*drug effects, Drug, Injections, Intraventricular, Isradipine/pharmacology, Male, Molecular Sequence Data, Rats, Schechter M D, Sprague-Dawley

Attenuation of drinking sweetened water following calcium channel blockade.

Recent reports cite results that both cocaine-induced conditioned place preference and activity stimulation are attenuated by pretreatment with the calcium channel blocker isradipine (ISR) in rats. By blocking voltage-dependent

Increases in the locomotor activity of rats after intracerebral administration of cathinone.

There is a widespread practice among people living in Eastern Africa and Southern Arabia of chewing the leaves of the Khat shrub so as to produce pharmacological effects that are practically indistinguishable from those produced by amphetamine…

Tags: 1992, Alkaloids/administration & dosage/*pharmacology, Animals, Brain research bulletin, Calcagnetti D J, Cerebral Ventricles/drug effects/*physiology, Dose-Response Relationship, Drug, Injections, Intraventricular, Male, Motor Activity/*drug effects, Nucleus Accumbens/drug effects/*physiology, Psychotropic Drugs/administration & dosage/*pharmacology, Rats, Schechter M D, Sprague-Dawley, Stereotaxic Techniques, Substantia Nigra/drug effects/*physiology

The noradrenergic component contributing to spinal fentanyl-induced antinociception is supraspinally mediated.

1. Male Sprague-Dawley rats were fitted with intrathecal (i.t.) and intracerebroventricular (i.c.v.) catheters. Fentanyl was injected either i.t. or i.c.v., and the antinociceptive efficacy of fentanyl was evaluated using the tail-flick…

Place preference for the psychostimulant cathinone is blocked by pretreatment with a dopamine release inhibitor.

1. The objective of Exp. 1 was to determine whether intracerebroventricular (ICV) injection of cathinone CATH (8.0-32 micrograms) would produce a dose-dependent conditioned place preference (CPP) and/or activation in rats. Results indicate that rats…

Psychostimulant-induced activity is attenuated by two putative dopamine release inhibitors.

Centrally administered amphetamine (AMPH), cathinone, (CATH), or cocaine (COC) have each been shown to produce elevated activity in rats and this effect is dose responsive. The question remains whether these psychostimulants share a common mechanism…

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…

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

Inhibition of dopamine and choline acetyltransferase concentrations in rat CNS neurons by rat alpha 1- and alpha 2-macroglobulins.

Previous studies have implicated human alpha-2-macroglobulin (alpha2M) as a potential regulator of neuronal development and function. Rat alpha-1-macroglobulin (alpha1M) and acute-phase alpha-2-macroglobulin (alpha2M) are murine homologues of human…

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