Abstract:
:The characteristics of the prefrontal cortex regulation of dopamine release in the rat dorsolateral striatum were investigated in focusing on the corticostriatal pathway, using dual-probe microdialysis in combination with simple behavioral procedures. Intracortical perfusion of the GABA(A) receptor antagonist bicuculline (0.03 and 0.1 mM) increased the striatal dopamine release, whereas the GABA(A) receptor agonist muscimol (0.1 and 1 mM) reduced the release dose dependently. Co-perfusion of muscimol (0.01 mM), which did not by itself affect the dopamine release, completely prevented the glutamate (1 mM)-stimulated dopamine release and behavioral activities, including locomotion and rearing. Muscimol (0.01 mM) also prevented the N-methyl-D-aspartate (NMDA; 1 mM)-induced increases in glutamate, as well as dopamine levels. These findings suggest that the prefrontal cortex functionally regulates dopamine release in the dorsolateral striatum, which is mediated via GABA(A) receptors. This cortical GABAergic system underlying the prefrontal cortex regulatory mechanism appears to be associated with the corticostriatal pathway.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Matsumoto M,Kanno M,Togashi H,Ueno K,Otani H,Mano Y,Yoshioka Mdoi
10.1016/j.ejphar.2003.10.003keywords:
subject
Has Abstractpub_date
2003-12-15 00:00:00pages
177-84issue
1-3eissn
0014-2999issn
1879-0712pii
S0014299903025214journal_volume
482pub_type
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