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Neurochem Int. 2012 Dec;61(7):986-91. doi: 10.1016/j.neuint.2012.07.008. Epub 2012 Jul 20.

Conserved dorsal-ventral gradient of dopamine release and uptake rate in mice, rats and rhesus macaques.

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  • 1Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, NC 27157, USA.

Abstract

Although the vast majority of research on the dopamine system has been performed in rodents, and it is assumed that this work will inform us about the human condition, there have been very few direct comparisons of presynaptic dopamine terminal function across multiple species. Because it is difficult to query rapid sub-second dopamine signaling in humans using voltammetric methods, we chose to compare dopamine signals across multiple striatal subregions in slices from C57BL/6J mice, Sprague-Dawley rats and rhesus macaques. We found a dorsal to ventral gradient of dopamine uptake rates with highest levels in the dorsal striatum and lowest levels in the nucleus accumbens shell, which is conserved across species. In addition to uptake rates, there was also a dorsal to ventral, high to low, gradient in the magnitude of stimulated DA release observed in monkeys, mice, and rats. These data demonstrate that there is considerable functional homology across striatal regions in non-human primates and rodents, lending support to the use of rodents as model systems to study dopamine-related circuitry and disorders that are clinically relevant to the human population.

Copyright © 2012 Elsevier Ltd. All rights reserved.

PMID:
22819794
[PubMed - indexed for MEDLINE]
PMCID:
PMC3593229
Free PMC Article

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