Haloperidol induces Fos expression in the globus pallidus and substantia nigra of cynomolgus monkeys

Systemic injections of the dopamine antagonist haloperidol (0.1–2.5 mg/kg) induced a dose dependent increase in Fos-like immunoreactivity (FLI) in the internal segment of the globus pallidus (GPi) and in the substantia nigra (SN) of cynomolgus monkeys. These findings are consistent with models of ba...

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Bibliographic Details
Published in:Brain research 1999-07, Vol.835 (2), p.154-161
Main Authors: Wirtshafter, David, Asin, Karen E.
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
c- fos
Dopamine
Dopamine Antagonists - pharmacology
Globus Pallidus - drug effects
Globus Pallidus - metabolism
Haloperidol - pharmacology
Immediate-early genes
Macaca fascicularis
Medical sciences
Nerve Tissue Proteins - biosynthesis
Neuroleptic
Neuropharmacology
Pharmacology. Drug treatments
Primate
Proto-Oncogene Proteins c-fos - biosynthesis
Psycholeptics: tranquillizer, neuroleptic
Psychology. Psychoanalysis. Psychiatry
Psychopharmacology
Substantia Nigra - drug effects
Substantia Nigra - metabolism
Subthalamic nucleus
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Summary:Systemic injections of the dopamine antagonist haloperidol (0.1–2.5 mg/kg) induced a dose dependent increase in Fos-like immunoreactivity (FLI) in the internal segment of the globus pallidus (GPi) and in the substantia nigra (SN) of cynomolgus monkeys. These findings are consistent with models of basal ganglia organization which predict that blockade of dopamine receptors should result in a disinhibition of cells in these structures. In the GPi, labeling was most pronounced along the ventral, lateral and medial borders of the nucleus and none of the pallidal cells expressing FLI were immunopositive for choline acetyltransferase. In the SN, immunoreactive nuclei were concentrated in the pars reticulata and the majority of labeled nigral neurons did not display tyrosine hydroxylase-like immunoreactivity. A small number of cells displaying FLI were also observed in the external pallidal segment, but no labeling was seen in the subthalamic nucleus. These findings indicate that blockade of dopamine receptors induces a characteristic pattern of Fos expression in the primate brain which strongly resembles that previously reported in rodents.
ISSN:0006-8993
1872-6240
DOI:10.1016/S0006-8993(99)01550-4