Abstract:
:Although fetal nigral transplants have been shown to survive grafting into the striatum, increased [(18)F]6-fluroro-L-3,4-dihydroxyphenylalanine ((18)F-DOPA) uptake and improved motor function in open-label assessments have failed to establish any clinical benefits in double-blind, sham-controlled studies. To understand morphological and neurochemical alterations of grafted neurons, we performed postmortem analyses on six Parkinson's disease (PD) patients who had received fetal tissue transplantation 18-19 months, 4 years, and 14 years previously. These studies revealed robust neuronal survival with normal dopaminergic phenotypes in 18-month-old grafts and decreased dopamine transporter and increased cytoplasmic alpha-synuclein in 4-year-old grafts. We also found a decline of both dopamine transporter and tyrosine hydroxylase and the formation of Lewy body-like inclusions in 14-year-old grafts, which stained positive for alpha-synuclein and ubiquitin proteins. These pathological changes suggest that PD is an ongoing process that affects grafted cells in the striatum in a manner similar to how resident dopamine neurons are affected in the substantia nigra.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Chu Y,Kordower JHdoi
10.1111/j.1749-6632.2009.05229.xsubject
Has Abstractpub_date
2010-01-01 00:00:00pages
55-67eissn
0077-8923issn
1749-6632pii
NYAS5229journal_volume
1184pub_type
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