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Pagina 1 a partire dal 1066 risultati
Opposite effects of stimulation of D1 and D2 dopamine receptors on the expression of motor seizures in mouse and rat.
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The ability of drugs, selective for dopamine D1 and D2 receptors, to influence the production of motor seizures was studied in mice and rats. Mice, which had been injected with reserpine (5 mg/kg) to deplete stores of monoamines in brain, could be made to convulse 24 hr later by injecting the D1
The dopamine D3/D2 agonist (+)-PD-128,907 [(R-(+)-trans-3,4a,10b-tetrahydro-4-propyl-2H,5H-[1]benzopyrano[4,3-b]-1,4-oxazin-9-ol)] protects against acute and cocaine-kindled seizures in mice: further evidence for the involvement of D3 receptors.
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Previous findings have demonstrated a protective role for dopamine D(3)/D(2) receptor agonists in the convulsant and lethal effects of acutely administered cocaine. Data are provided here to establish that the protection occurs through a D(3)-linked mechanism and that protection is extended to
Effects of dopamine D3 receptor agonists on pilocarpine-induced limbic seizures in the rat.
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The discrete localization of D3 receptors in the nucleus accumbens and subjacent islands of Calleja bears a close resemblance to the dopamine-sensitive anticonvulsant site in the anteroventral striatum. To determine if these D3 receptors were capable of attenuating limbic motor seizures induced by
Brain dopamine and seizure susceptibility in mice.
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In electroshock test apomorphine appeared without effect, D, L-amphetamine and L-DOPA (in a high dose) elevated the convulsive threshold, while amantadine decreased it. Among investigated dopamine (DA) receptor blockers spiperone, pimozide and fluphenazine lowered the threshold, haloperidol being
Dopamine control of seizure propagation: intranigral dopamine D1 agonist SKF-38393 enhances susceptibility to seizures.
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The involvement of dopamine (DA) in human and experimental epilepsy has been discounted as DAergic drugs have little effect on convulsions. This work presents evidence that bilateral microinjection of the DAD1 agonist SKF-38393 into the substantia nigra enhances the susceptibility of rats to
Dopamine D1 and D2 receptors mediate opposite functions in seizures induced by lithium-pilocarpine.
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The effect of selective dopamine receptor blockade on epileptic activity was tested in rats, using the lithium-pilocarpine seizure model. One day after lithium pretreatment, systemic administration of the dopamine D1 antagonist, SCH 23390, prevented the convulsive activity induced by either 10 or 15
Effects of dopamine D1 and D2 receptor agonists and antagonists on seizures induced by chemoconvulsants in mice.
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Dopamine agonists and antagonists with different affinities for D1 and D2 receptors in the brain were assessed for their ability to affect clonic seizures in mice induced by chemoconvulsants. The dopamine D2 antagonists remoxipride (5-20 mg/kg) and raclopride (5-20 mg/kg), haloperidol (2.5 and 5
Comparative study of tiapride and neuroleptics with anti-dopamine activity on convulsive seizure in mice.
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The effects of tiapride on the convulsive seizures induced by pentylenetetrazole, strychnine, picrotoxin and bemegride, and on electric seizure are reported and compared with those of sulpiride, chlorpromazine, haloperidol and reserpine. The number of deaths and intensity of convulsion increased
Glutamate-dopamine interactions in the production of pilocarpine motor seizures in the mouse.
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An assortment of glutamate antagonists with differing selectivities for NMDA and AMPA-type glutamate receptors, were tested for their effects in the mouse pilocarpine model of complex partial seizures. MK 801 (0.1-0.8 mg/kg) and high doses of HA 966 (50 mg/kg) were proconvulsant, whilst CGP 40116
Maturational changes related to dopamine in the effects of d-amphetamine, cocaine, nicotine, and strychnine on seizure susceptibility.
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The effects of four neural excitants (damphetamine, cocaine, nicotine, and strychnine) on myoclonic and clonic seizure susceptibility were investigated in two age groups (30 and 120 days) of short-sleep mice. Amphetamine and cocaine decreased susceptibility to myoclonus in young mice and increased
Effectiveness of vigabatrin against focally evoked pilocarpine-induced seizures and concomitant changes in extracellular hippocampal and cerebellar glutamate, gamma-aminobutyric acid and dopamine levels, a microdialysis-electrocorticography study in freely moving rats.
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Limbic seizures were evoked in freely moving rats by intrahippocampal administration of the muscarinic agonist pilocarpine via the microdialysis probe (10 mM for 40 min at 2 microl/min). This study monitored changes in extracellular hippocampal gamma-aminobutyric acid (GABA), glutamate and dopamine
Influence of dopamine, levodopa and apomorphine on maximal electroconvulsive seizure in the domestic fowl (Gallus domesticus).
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The influence of dopamine, levodopa and apomorphine on maximal electroconvulsive seizure was studied in young chicks, adult cocks and rats. The susceptibility of chicks to maximal electroshock seizure increased with age between 1 to 7 days. Low to moderate doses of dopamine (12.5-150 mg/kg, i.p.),
The 3' part of the dopamine transporter gene DAT1/SLC6A3 is associated with withdrawal seizures in patients with alcohol dependence.
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BACKGROUND
Some studies have reported that the A9 allele of the variable nucleotide tandem repeat (VNTR) of the gene which encodes the dopamine transporter (DAT1/SLC6A3) is associated with alcoholism withdrawal symptoms such as alcohol withdrawal seizures (WSs), whereas others did not. We
Kainic acid-induced seizures modulate Akt (SER473) phosphorylation in the hippocampus of dopamine D2 receptor knockout mice.
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Dopamine D2 receptor (D2R) signalling has been shown to modulate seizure-induced hippocampal cell death. D2R knockout (D2R-/-) mice are more susceptible to kainic acid (KA)-induced excitotoxicity, displaying cell death in the CA3 subfield of the hippocampus at KA doses not damaging in wild-type (WT)
Elevated Urinary Glyphosate and Clostridia Metabolites With Altered Dopamine Metabolism in Triplets With Autistic Spectrum Disorder or Suspected Seizure Disorder: A Case Study.
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BACKGROUND
Autism is a neurodevelopmental disorder for which a number of genetic, environmental, and nutritional causes have been proposed. Glyphosate is used widely as a crop desiccant and as an herbicide in fields of genetically modified foods that are glyphosate resistant. Several researchers
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