TY - JOUR
T1 - Modification of levodopa responses by deprenyl (Selegiline)
T2 - An electrophysiological and behavioral study in the rat relevant to Parkinson's disease
AU - Mercuri, Nicola B.
AU - Scarponi, Mariangela
AU - Federici, Mauro
AU - Bonci, Antonello
AU - Siniscalchi, Antonio
AU - Bernardi, Giorgio
PY - 1998/5
Y1 - 1998/5
N2 - From using in vitro intracellular recordings from mesencephalic neurons and monoamine-depleted rats, we report that the functions of levodopa in the brain are greatly enhanced and prolonged by high doses of the monoamine oxidase (MAO) inhibitor deprenyl. Dopaminergic neurons were hyperpolarized and inhibited by levodopa application. These effects of levodopa were largely potentiated by pretreatment with nonselective doses of deprenyl. Furthermore, when locomotor activity induced by levodopa was examined on a rodent model of Parkinson's disease, pretreatment of the animals with nonselective doses of deprenyl caused an enhancement of the antiparkinsonian action of levodopa. The great increase in levodopa responses by deprenyl suggests a likely therapeutic use of this dopamine precursor with a higher dosage of the MAO inhibitor, to reduce effectively the daily levodopa requirements in Parkinson's disease patients.
AB - From using in vitro intracellular recordings from mesencephalic neurons and monoamine-depleted rats, we report that the functions of levodopa in the brain are greatly enhanced and prolonged by high doses of the monoamine oxidase (MAO) inhibitor deprenyl. Dopaminergic neurons were hyperpolarized and inhibited by levodopa application. These effects of levodopa were largely potentiated by pretreatment with nonselective doses of deprenyl. Furthermore, when locomotor activity induced by levodopa was examined on a rodent model of Parkinson's disease, pretreatment of the animals with nonselective doses of deprenyl caused an enhancement of the antiparkinsonian action of levodopa. The great increase in levodopa responses by deprenyl suggests a likely therapeutic use of this dopamine precursor with a higher dosage of the MAO inhibitor, to reduce effectively the daily levodopa requirements in Parkinson's disease patients.
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U2 - 10.1002/ana.410430509
DO - 10.1002/ana.410430509
M3 - Article
C2 - 9585355
AN - SCOPUS:0031958576
VL - 43
SP - 613
EP - 617
JO - Annals of Neurology
JF - Annals of Neurology
SN - 0364-5134
IS - 5
ER -