Blinded positron emission tomography study of dopamine cell implantation for Parkinson's disease.

Abstract:

:We assessed nigrostriatal dopaminergic function in Parkinson's disease (PD) patients undergoing a double-blind, placebo-controlled surgical trial of embryonic dopamine cell implantation. Forty PD patients underwent positron emission tomography (PET) imaging with [18F]fluorodopa (FDOPA) prior to randomization to transplantation or placebo surgery. The 39 surviving patients were rescanned one year following surgery. Images were quantified by investigators blinded to treatment status and clinical outcome. Following unblinding, we determined the effects of treatment status and age on the interval changes in FDOPA/PET signal. Blinded observers detected a significant increase in FDOPA uptake in the putamen of the group receiving implants compared to the placebo surgery patients (40.3%). Increases in putamen FDOPA uptake were similar in both younger (age < or = 60 years) and older (age > 60 years) transplant recipients. Significant decrements in putamen uptake were evident in younger placebo-operated patients (-6.5%) but not in their older counterparts. Correlations between the PET changes and clinical outcome were significant only in the younger patient subgroup (r = 0.58). The findings suggest that patient age does not influence graft viability or development in the first postoperative year. However, host age may influence the time course of the downstream functional changes that are needed for clinical benefit to occur.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Nakamura T,Dhawan V,Chaly T,Fukuda M,Ma Y,Breeze R,Greene P,Fahn S,Freed C,Eidelberg D

doi

10.1002/ana.1075

keywords:

subject

Has Abstract

pub_date

2001-08-01 00:00:00

pages

181-7

issue

2

eissn

0364-5134

issn

1531-8249

journal_volume

50

pub_type

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