Abstract
Over the past 13 years approximately 300 patients with Parkinson’s disease have received transplants of human fetal dopamine cells in an attempt to reduce or control disease symptoms. Many of these patients have had improvements in their motor skills and a reduction in their daily levodopa administration. However, improvements are far from guaranteed and questions need to be answered before this technique can be widely applied. To help address some of these issues, a search of all the published results of patients with Parkinson’s disease transplanted with human fetal tissue was conducted. This generated a database of 70 transplant recipients who had their levodopa administration and clinical benefit reported both prior to transplant and at least 6 months post-transplant. Furthermore, the number of years of disease onset prior to transplant was available for all recipients. This database was examined for motor improvement and reduction in levodopa dosage for up to 2 years post-transplant to determine the effects of time on transplant outcome. The database showed that most recipients had significant improvements in motor skills and levodopa administration, and that most benefits were observed in the first 6 months post-transplant. In addition, the database demonstrated that the number of years of disease onset prior to transplantation was not a predictor of patient outcome 1-year post-transplant. Current and future directions in fetal tissue transplantation research and replacements for fetal tissue are discussed.
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Acknowledgements
All funding has been provided by the US Army Institute for Chemical Defense. The author has no individual grants. There are no conflicts of interest. The author would like to thank his mentor and former employer Professor Curt R. Freed for training and input, Dr Kim B. Bjugstad for statistical analysis and Dr Daphne G. Albright for patience.
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Clarkson, E.D. Fetal Tissue Transplantation for Patients with Parkinson’s Disease. Drugs & Aging 18, 773–785 (2001). https://doi.org/10.2165/00002512-200118100-00006
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DOI: https://doi.org/10.2165/00002512-200118100-00006