Movement Disorders (revue)

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Beginning-of-dose and rebound worsening in MPTP-treated common marmosets treated with levodopa.

Identifieur interne : 003B85 ( PubMed/Checkpoint ); précédent : 003B84; suivant : 003B86

Beginning-of-dose and rebound worsening in MPTP-treated common marmosets treated with levodopa.

Auteurs : Mikko Kuoppam Ki [Royaume-Uni] ; Ghassan Al-Barghouthy ; Michael Jackson ; Lance Smith ; Bai-Yun Zeng ; Niall Quinn ; Peter Jenner

Source :

RBID : pubmed:12465074

English descriptors

Abstract

A wide range of motor fluctuations develop in Parkinson's disease (PD) patients after prolonged levodopa (L-dopa) treatment, but few experimental models exist in which these can be investigated. We report on motor fluctuations occurring in MPTP-treated common marmosets (Callithrix jacchus) treated repeatedly with L-dopa. All animals showed an improvement in motor function in response to L-dopa, and rapidly developed peak-dose dyskinesia. During the period of L-dopa action, brief periods of immobility were occasionally observed. After acute L-dopa challenge, animals exhibited a worsening of motor function before improvement, and after the beneficial response to L-dopa declined, motor performance showed rebound worsening to below-baseline values. Before L-dopa challenge and during wearing-off and rebound worsening, leg dystonias were observed. Although these findings cannot necessarily be generalized to all MPTP-treated nonhuman primates, they demonstrate that MPTP-treated marmosets show a range of different motor fluctuations analogous to those seen in PD patients chronically treated with L-dopa. Therefore, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated primates can provide a model in which the pathophysiology of treatment complications can be investigated.

DOI: 10.1002/mds.10263
PubMed: 12465074


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pubmed:12465074

Le document en format XML

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<term>Disease Models, Animal</term>
<term>Dose-Response Relationship, Drug</term>
<term>Dyskinesia, Drug-Induced (physiopathology)</term>
<term>Female</term>
<term>Levodopa (toxicity)</term>
<term>Male</term>
<term>Motor Activity (drug effects)</term>
<term>Motor Skills (drug effects)</term>
<term>Neurologic Examination (drug effects)</term>
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<div type="abstract" xml:lang="en">A wide range of motor fluctuations develop in Parkinson's disease (PD) patients after prolonged levodopa (L-dopa) treatment, but few experimental models exist in which these can be investigated. We report on motor fluctuations occurring in MPTP-treated common marmosets (Callithrix jacchus) treated repeatedly with L-dopa. All animals showed an improvement in motor function in response to L-dopa, and rapidly developed peak-dose dyskinesia. During the period of L-dopa action, brief periods of immobility were occasionally observed. After acute L-dopa challenge, animals exhibited a worsening of motor function before improvement, and after the beneficial response to L-dopa declined, motor performance showed rebound worsening to below-baseline values. Before L-dopa challenge and during wearing-off and rebound worsening, leg dystonias were observed. Although these findings cannot necessarily be generalized to all MPTP-treated nonhuman primates, they demonstrate that MPTP-treated marmosets show a range of different motor fluctuations analogous to those seen in PD patients chronically treated with L-dopa. Therefore, 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-treated primates can provide a model in which the pathophysiology of treatment complications can be investigated.</div>
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