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Pretreatment with a dopamine D1-receptor antagonist prevents metabolic activation by cocaine
W L Thomas1, E S Cooke, R P Hammer
1Department of Psychiatry, New England Medical Center, Tufts University School of Medicine, Boston, MA 02111, USA.
Neuroscience Letters
|August 25, 1995
Abstract:
The pharmacological mechanism underlying metabolic activation of the rat extrapyramidal system by acute cocaine was examined using the quantitative 2-deoxyglucose autoradiographic method. Pretreatment with a selective dopamine D1-like receptor antagonist, SCH 23390, prevented cocaine-induced metabolic activation in the entopeduncular nucleus and substantia nigra pars reticulata in a dose-dependent manner. These results suggest that activity in striatonigral circuits is induced by stimulation of D1-like receptors by dopamine in the presence of acute cocaine.