Progress in Neuro-Psychopharmacology and Biological Psychiatry
1989
Paul L. Wood, Tadimeti S. Rao
1. As reported for many other PCP receptor actions, the pharmacological profile of PCP receptor agonists and NMDA receptor antagonists were similar with regard to their effects on cerebellar cGMP levels in vivo. 2. PCP receptor agonists act to increase mesocortical dopamine (DA) metabolism and release. 3. This receptor action is stereospecific and is both dose- and time-dependent. 4. The...
Psychopharmacology
1989
M A Nader, S M Hoffmann, J E Barrett
The effects of three amphetamine analogs were assessed in pigeons key pecking under a multiple 3-min fixed-interval (FI), 30 response fixed-ratio (FR) schedule of food presentation. At doses between 0.1 and 10.0 mg/kg, (+-) 3,4-methylenedioxyamphetamine (MDA), (+-) 3,4-methylenedioxymethamphetamine (MDMA), and (+-)-N-ethyl-3,4-methylenedioxyamphetamine (MDE) either had no effect or decreased...
Psychopharmacology
1989
S M Mittman, Mark A. Geyer
Behavioral profiles composed of both locomotor activity and investigatory behavior were established for the 5HT-1A agonists 8OHDPAT, buspirone, gepirone, and ipsapirone using rats tested in a Behavioral Pattern Monitor. Typically these compounds dose-relatedly decreased horizontal locomotion and investigatory activity during the first half of the 1-h test session. Time-course studies revealed...
Progress in Neuro-Psychopharmacology and Biological Psychiatry
1989
P Carvey, P Nausieda, R Weertz et al.
1. We evaluated the behavioral response of guinea pigs to hallucinogenic agents in order to characterize the response of this species to a variety of known hallucinogenic drugs. 2. The systemic injection of LSD in the guinea pig elicited a "myoclonic-like" response the frequency of which was dose-dependent. This behavior exhibited rapid tolerance which was more prominent at higher doses. 3....
Psychopharmacology
1989
L J Herberg, I C Rose
MK-801 is a ligand at phencyclidine recognition sites associated with NMDA-coupled cation channels, where it acts as a potent noncompetitive antagonist of central glutamate/aspartate (NMDA-type) receptors. Low doses (10-100 micrograms/kg IP) produced a dose-related and prolonged (greater than 1 h) enhancement of variable-interval self-stimulation responding. Higher doses (300 micrograms/kg)...
Medical toxicology and adverse drug experience
1989
J B Leikin, A J Krantz, M Zell-Kanter et al.
Hallucinogenic drugs are unique in that they produce the desired hallucinogenic effects at what are considered non-toxic doses. The hallucinogenic drugs can be categorised into 4 basic groups: indole alkaloid derivatives, piperidine derivatives, phenylethylamines and the cannabinols. The drugs reviewed include lysergic acid diethylamide (LSD), phencyclidine (PCP), cocaine, amphetamines,...
PsycEXTRA Dataset
1989
E B de Souza, Giuseppe Battaglia
The data presented in this chapter provide strong evidence, from both neurochemical and neuroanatomical studies, demonstrating that, following in vivo administration of a number of methylenedioxy-substituted amphetamine derivatives, there is widespread and long-lasting degeneration of serotonin neurons in brain, without any major or consistent effects on catecholamine neurons. A detailed...
Pharmacology, Biochemistry, and Behavior
November 1988
S J Heishman, M L Stitzer, G E Bigelow
This study compared subjective and performance dose effect profiles of oral alcohol and smoked marijuana. Male subjects (N = 6) with histories of moderate alcohol and marijuana use received three doses of alcohol (0, 0.6, 1.2 g/kg) and three doses of marijuana (0, 1.3, 2.7% delta 9-THC) in a double-blind, randomized crossover design. Physiological indices indicated that active drug was...
Anesthesiology
August 1988
D W Davis, A M Mans, J F Biebuyck et al.
The purpose of this study was to determine the effect of different doses of ketamine on cerebral function at the level of individual brain structures as reflected by glucose use. Rats received either 5 or 30 mg/kg ketamine intravenously as a loading dose, followed by an infusion to maintain a steady-state level of the drug. An additional group received 30 mg/kg as a single injection only, and...
FEBS Letters
August 1, 1988
A S Ramoa, E X Albuquerque
Phencyclidine (PCP) is a dissociative anesthetic agent which blocks the excitatory effect of N-methyl-D-aspartate (NMDA) in the central nervous system. To investigate the role of the PCP reactive site in the control of NMDA activation of hippocampal pyramidal cells, we have examined the action of PCP and some of its analogues on the response properties of single NMDA receptors. Application of...