Journal
JOURNAL OF NEURAL TRANSMISSION
Volume 114, Issue 3, Pages 319-326Publisher
SPRINGER WIEN
DOI: 10.1007/s00702-006-0547-x
Keywords
Parkinsonism; cytochrome oxidase I; choline acetyl transferase; Substance P; in situ hybridization; primates
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The pedunculopontine nucleus is a mesencephalic nucleus that has widespread and reciprocal connections with the basal ganglia. It has been implicated in the physiopathology of akinesia, rigidity, gait failure and sleep disorders associated with Parkinson's disease. In this study, in situ hybridization was used to examine the changes in neuronal metabolic activity (measuring cytochrome oxidase subunit I) and in the level of acetylcholine and Substance P synthesis in the pedunculopontine nucleus of monkeys chronically treated with MPTP. Significant reductions were observed in cytochrome oxidase subunit I (p = 0.001), choline acetyl transferase (p = 0.003) and substance P (p = 0.006) mRNA expression in parkinsonian animals compared with controls, indicating that pedunculopontine cholinergic neurons activity decreases with parkinsonism.
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