Movement Disorders (revue)

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Graft-induced dyskinesias in Parkinson's disease: High striatal serotonin/dopamine transporter ratio.

Identifieur interne : 001200 ( PubMed/Curation ); précédent : 001199; suivant : 001201

Graft-induced dyskinesias in Parkinson's disease: High striatal serotonin/dopamine transporter ratio.

Auteurs : Marios Politis [Royaume-Uni] ; Wolfgang H. Oertel ; Kit Wu ; Niall P. Quinn ; Oliver Pogarell ; David J. Brooks ; Anders Bjorklund ; Olle Lindvall ; Paola Piccini

Source :

RBID : pubmed:21611977

English descriptors

Abstract

Graft-induced dyskinesias are a serious complication after neural transplantation in Parkinson's disease. One patient with Parkinson's disease, treated with fetal grafts 14 years ago and deep brain stimulation 6 years ago, showed marked improvement of motor symptoms but continued to suffer from OFF-medication graft-induced dyskinesias. The patient received a series of clinical and imaging assessments. Positron emission tomography and single-photon emission computed tomography 14 years posttransplantation revealed an elevated serotonin/dopamine transporter ratio in the grafted striatum compatible with serotonergic hyperinnervation. Inhibition of serotonin neuron activity by systemic administration of a 5-HT(1A) agonist suppressed graft-induced dyskinesias. Our data provide further evidence that serotonergic neurons mediate graft-induced dyskinesias in Parkinson's disease. Achieving a normal striatal serotonin/dopamine transporter ratio following transplantation of fetal tissue or stem cells should be necessary to avoid the development of graft-induced dyskinesias.

DOI: 10.1002/mds.23743
PubMed: 21611977

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pubmed:21611977

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<div type="abstract" xml:lang="en">Graft-induced dyskinesias are a serious complication after neural transplantation in Parkinson's disease. One patient with Parkinson's disease, treated with fetal grafts 14 years ago and deep brain stimulation 6 years ago, showed marked improvement of motor symptoms but continued to suffer from OFF-medication graft-induced dyskinesias. The patient received a series of clinical and imaging assessments. Positron emission tomography and single-photon emission computed tomography 14 years posttransplantation revealed an elevated serotonin/dopamine transporter ratio in the grafted striatum compatible with serotonergic hyperinnervation. Inhibition of serotonin neuron activity by systemic administration of a 5-HT(1A) agonist suppressed graft-induced dyskinesias. Our data provide further evidence that serotonergic neurons mediate graft-induced dyskinesias in Parkinson's disease. Achieving a normal striatal serotonin/dopamine transporter ratio following transplantation of fetal tissue or stem cells should be necessary to avoid the development of graft-induced dyskinesias.</div>
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