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The DOPAC/dopamine and HVA/dopamine ratios in extracted whole tissue were determined to obtain an index of dopaminergic activity in various rat brain regions 24 h following 10 days' treatment with haloperidol (0.5 and 2 mg/kg) or sulpiride (10 and 100 mg/kg). Both neuroleptics caused a reduction in the metabolite/amine ratio in nucl. accumbens but not frontal cortex or substantia nigra. Haloperidol, but not sulpiride significantly reduced the HVA/dopamine ratio in striatum. A region-specific action of neuroleptics on brain dopamine neurons is discussed.

Type

Journal article

Journal

Eur J Pharmacol

Publication Date

07/10/1986

Volume

129

Pages

401 - 404

Keywords

3,4-Dihydroxyphenylacetic Acid, Animals, Brain, Dopamine, Haloperidol, Homovanillic Acid, Male, Rats, Rats, Inbred Strains, Sulpiride, Tissue Distribution