Abstract
Severe dyskinesias during the 'off' phases (periods of increased Parkinson's disease (PD) disability) have been observed following intrastriatal transplantation of human embryonic mesencephalic tissue1. Here we retrospectively analyzed 14 patients who were followed for up to 11 years after grafting, and found that dyskinesias (abnormal involuntary movements and postures) increased during postoperative off phases, but were generally of mild to moderate severity. Dyskinesia severity was not related to the magnitude of graft-derived dopaminergic re-innervation, as judged by 18F-labeled 6-L-fluorodopa (FD) positron emission tomography (PET), indicating that off-phase dyskinesias probably did not result from excessive growth of grafted dopaminergic neurons.
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Acknowledgements
This study was supported by the British and Swedish Medical Research Council, the United Kingdom Parkinson's Disease Society, the Gemeinnützige Hertie Stiftung, the Skane County Council Research and Development Foundation and the Kock, Wiberg, Söderberg and King Gustav V and Queen Victoria Foundations.
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Hagell, P., Piccini, P., Björklund, A. et al. Dyskinesias following neural transplantation in Parkinson's disease. Nat Neurosci 5, 627–628 (2002). https://doi.org/10.1038/nn863
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DOI: https://doi.org/10.1038/nn863
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