Effects of a psychostimulant drug sydnocarb on rat brain dopaminergic transmission in vivo.
Eur J Pharmacol
; 340(1): 53-8, 1997 Dec 04.
Article
em En
| MEDLINE
| ID: mdl-9527506
Transcerebral microdialysis was used to evaluate the effect of a psychostimulant drug, sydnocarb (3-(beta-phenylisopropyl)-N-phenylcarbamoylsydnonimine), on the extracellular levels of dopamine, 3,4-dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in the dorsal striatum and nucleus accumbens of freely moving rats. Sydnocarb dose dependently (4.4, 8.75 and 17.5 mg/kg, i.p.) induced a relatively modest (up to 350% of control) and long-lasting (up to 6 h) increase in dopamine extracellular level in the rat dorsal striatum. The drug at 8.75 mg/kg, i.p., produced an approximately similar increase in dopamine efflux in the dorsal striatum and in the nucleus accumbens of freely moving rats. Sydnocarb had no effect on DOPAC or HVA extracellular levels in the rat basal ganglia in vivo at any dose studied. It is important that the drug increased the efflux of dopamine in a tetrodotoxin-sensitive and Ca2+-dependent manner. Measurements of behavioral parameters in non-operated rats revealed that sydnocarb markedly increased locomotor activity and induced stereotyped behavior. These data suggest that the stimulant action of sydnocarb is accompanied by a facilitation of central dopaminergic transmission involving an increase in Ca2+-dependent vesicular dopamine efflux.
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Base de dados:
MEDLINE
Assunto principal:
Sidnonas
/
Ácido 3,4-Di-Hidroxifenilacético
/
Dopamina
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Corpo Estriado
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Ácido Homovanílico
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Estimulantes do Sistema Nervoso Central
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Antidepressivos
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Núcleo Accumbens
Limite:
Animals
Idioma:
En
Ano de publicação:
1997
Tipo de documento:
Article