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Titolo:
THE 5-HT1A RECEPTOR ANTAGONIST (S)-UH-301 DECREASES DOPAMINE RELEASE IN THE RAT NUCLEUS-ACCUMBENS AND STRIATUM
Autore:
NOMIKOS GG; ARBORELIUS L; HOOK BB; HACKSELL U; SVENSSON TH;
Indirizzi:
KAROLINSKA INST,DEPT PHYSIOL & PHARMACOL,DIV PHARMACOL S-17177 STOCKHOLM SWEDEN KAROLINSKA INST,DEPT PHYSIOL & PHARMACOL,DIV PHARMACOL S-17177 STOCKHOLM SWEDEN UPPSALA UNIV,DEPT ORGAN PHARMACEUT CHEM UPPSALA SWEDEN
Titolo Testata:
Journal of neural transmission
fascicolo: 5, volume: 103, anno: 1996,
pagine: 541 - 554
SICI:
0300-9564(1996)103:5<541:T5RA(D>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
VENTRAL TEGMENTAL AREA; BRAIN DIALYSIS; EXTRACELLULAR DOPAMINE; INVIVO MICRODIALYSIS; SUBSTANTIA-NIGRA; INTERSTITIAL CONCENTRATIONS; AFFERENT REGULATION; PREFRONTAL CORTEX; SEROTONIN; NEURONS;
Keywords:
5-HT1A; DOPAMINE; NUCLEUS ACCUMBENS; STRIATUM; RAT; MICRODIALYSIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
G.G. Nomikos et al., "THE 5-HT1A RECEPTOR ANTAGONIST (S)-UH-301 DECREASES DOPAMINE RELEASE IN THE RAT NUCLEUS-ACCUMBENS AND STRIATUM", Journal of neural transmission, 103(5), 1996, pp. 541-554

Abstract

In this study we employed in vivo microdialysis to examine the effects of the selective 5-HT1A receptor antagonist (S)-5-fluoro-8-hydroxy-2-(dipropylamino)tetralin [(S)-UH-301] on extracellular concentrations of dopamine (DA) and its metabolites dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in the nucleus accumbens (NAC) and dorsal striatum of awake freely moving rats. Systemic administration of (S)-UH-301 (1.25, 2.5, 5.0 mg/kg s.c.) dose-dependently decreased extracellular concentrations of DA, DOPAC and HVA in the NAG. (S)-UH-301 (2.5mg/kg s.c.) also decreased DA, but not DOPAC and HVA, concentrations in the striatum. Infusion of low concentrations (1, 10 mu M) of (S)-UH-301 into either the NAC or the striatum did not affect DA levels, while only the highest concentration (1,000 mu M) significantly decreasedDA levels in both areas. Similarly, infusion of the selective 5-HT1A receptor agonist (R)-8-hydroxy-2-(di-n-propylamino)tetralin [(R)-8-OH-DPAT] only in high concentrations (100, 1,000 mu M) decreased DA levels in both regions. These data suggest that (S)-UH-301 decreases DA release both in the NAC and the striatum probably indirectly via its purported DA-D-2/D-3 receptor agonistic properties. However, the observed inhibitory effect of (S)-UH-301 on DA release in the studied brain regions may also be explained, at least partly, by a serotonergic influence on the DA systems, acting at 5-HT1A receptor sites located elsewhere in the brain.

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Documento generato il 18/09/20 alle ore 10:13:39