MovDisordV3, Main, Exploration, bibRecord, 004217

Embryonic mesencephalic grafts increase levodopa-induced forelimb hyperkinesia in Parkinsonian rats

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Embryonic mesencephalic grafts increase levodopa-induced forelimb hyperkinesia in Parkinsonian rats

Auteurs : Kathy Steece-Collier [États-Unis] ; Timothy J. Collier [États-Unis] ; Paul D. Danielson [États-Unis] ; Roger Kurlan [États-Unis] ; David M. Yurek [États-Unis] ; John R. Jr Sladek [États-Unis]

Source :

Movement disorders [ 0885-3185 ] ; 2003.

RBID : Pascal:04-0130459

Descripteurs français

Pascal (Inist)
- Parkinson maladie, Dyskinésie, Homogreffe, Mésencéphale, Embryon, Neurone, Lévodopa, Chimiothérapie, Toxicité, Traitement, Thérapie cellulaire, Complication, Rat, Animal, Modèle animal.

English descriptors

KwdEn :
- Animal, Animal model, Cell therapy, Chemotherapy, Complication, Dyskinesia, Embryo, Homograft, Levodopa, Midbrain, Neuron, Parkinson disease, Rat, Toxicity, Treatment.

Abstract

Recent observations from clinical trials of neural grafting for Parkinson's disease (PD) have demonstrated that grafted dopamine neurons can worsen dyskinesias in some graft recipients. This deleterious side effect reveals a new challenge for neural transplantation, that of elucidating mechanisms underlying these postgraft dyskinesias. One problem facing this challenge is the availability of a cost-effective and reliable animal model in which to pursue initial investigations. In the current study, we investigated the interaction of an embryonic ventral mesencephalic (VM) dopamine (DA) neuron graft on levodopa (LD)-induced dyskinetic movements in unilaterally 6-hydroxydopamine-lesioned rats. Rats were administered LD (levodopa-carbidopa, 50:5 mg/kg) twice daily for 6 weeks after either a sham graft or VM DA graft. Although a single solid graft of embryonic DA neurons can prevent progression of some lesioned-induced behavioral abnormalities such as LD-induced rotation and dystonia, it significantly increases hyperkinetic movements of the contralateral forelimb. This differential effect of grafted neurons on abnormal behavioral profiles is reminiscent of that reported in grafted patients with PD. Data from this study illustrate important similarities between this model of parkinsonism and PD in human patients that make it suitable for initial preclinical investigations into possible mechanisms underlying postgraft aggravation of dyskinetic movements.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">Recent observations from clinical trials of neural grafting for Parkinson's disease (PD) have demonstrated that grafted dopamine neurons can worsen dyskinesias in some graft recipients. This deleterious side effect reveals a new challenge for neural transplantation, that of elucidating mechanisms underlying these postgraft dyskinesias. One problem facing this challenge is the availability of a cost-effective and reliable animal model in which to pursue initial investigations. In the current study, we investigated the interaction of an embryonic ventral mesencephalic (VM) dopamine (DA) neuron graft on levodopa (LD)-induced dyskinetic movements in unilaterally 6-hydroxydopamine-lesioned rats. Rats were administered LD (levodopa-carbidopa, 50:5 mg/kg) twice daily for 6 weeks after either a sham graft or VM DA graft. Although a single solid graft of embryonic DA neurons can prevent progression of some lesioned-induced behavioral abnormalities such as LD-induced rotation and dystonia, it significantly increases hyperkinetic movements of the contralateral forelimb. This differential effect of grafted neurons on abnormal behavioral profiles is reminiscent of that reported in grafted patients with PD. Data from this study illustrate important similarities between this model of parkinsonism and PD in human patients that make it suitable for initial preclinical investigations into possible mechanisms underlying postgraft aggravation of dyskinetic movements.</div>
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	Movement Disorders (revue)
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Movement Disorders (revue)

Embryonic mesencephalic grafts increase levodopa-induced forelimb hyperkinesia in Parkinsonian rats

Embryonic mesencephalic grafts increase levodopa-induced forelimb hyperkinesia in Parkinsonian rats

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Descripteurs français

English descriptors

Abstract

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