Elsevier

Brain Research

Volume 373, Issues 1–2, 14 May 1986, Pages 85-91
Brain Research

In vivo voltammetric characterization of low affinity striatal dopamine uptake: Drug inhibition profile and relation to dopaminergic innervation density

https://doi.org/10.1016/0006-8993(86)90318-5Get rights and content

Abstract

Electrical stimulation of the median forebrain bundle evoked dopamine release in the ipsilateral striatum which was monitored with high-speed cyclic voltammetry. After stimulation, the extracellular concentration of dopamine fell due to uptake in a biphasic manner, showing zero-order and first-order components. The zero-order phase corresponded to a Vmax of 42.8 ± 1.8nmol/min/g tissue. The uptake system could be blocked by d-amphetamine, methylphenidate and nomifensine, but not by benztropine, amfonelic acid or mazindol. The density of uptake sites showed a correlation with the density of striatal dopamine innervation.

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