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Dopamine Release in Rat Striatum: Physiological Coupling to Tyrosine Supply

Dopamine Release in Rat Striatum: Physiological Coupling to Tyrosine Supply Abstract: Intracerebral microdialysis was used to monitor dopamine release in rat striatal extracellular fluid following the intraperitoneal administration of dopamine's precursor amino acid, l‐tyrosine. Dopamine concentrations in dialysates increased transiently after tyrosine (50–100 mg/kg) administration. Pretreatment with haloperidol or the partial lesioning of nigrostriatal neurons enhanced the effect of tyrosine on dopamine release, and haloperidol also prolonged this effect. These data suggest that nigrostriatal dopaminergic neurons are responsive to changes in precursor availability under basal conditions, but that receptor‐mediated feedback mechanisms limit the magnitude and duration of this effect. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurochemistry Wiley

Dopamine Release in Rat Striatum: Physiological Coupling to Tyrosine Supply

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References (40)

Publisher
Wiley
Copyright
Copyright © 1989 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0022-3042
eISSN
1471-4159
DOI
10.1111/j.1471-4159.1989.tb09192.x
Publisher site
See Article on Publisher Site

Abstract

Abstract: Intracerebral microdialysis was used to monitor dopamine release in rat striatal extracellular fluid following the intraperitoneal administration of dopamine's precursor amino acid, l‐tyrosine. Dopamine concentrations in dialysates increased transiently after tyrosine (50–100 mg/kg) administration. Pretreatment with haloperidol or the partial lesioning of nigrostriatal neurons enhanced the effect of tyrosine on dopamine release, and haloperidol also prolonged this effect. These data suggest that nigrostriatal dopaminergic neurons are responsive to changes in precursor availability under basal conditions, but that receptor‐mediated feedback mechanisms limit the magnitude and duration of this effect.

Journal

Journal of NeurochemistryWiley

Published: May 1, 1989

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