Volume 21, Issue 9 p. 1326-1332
Research Article

Striatal dopa and glucose metabolism in PD patients with freezing of gait

Anna L. Bartels MD

Corresponding Author

Anna L. Bartels MD

Neurology Department of the University Medical Center Groningen, The Netherlands

University of Groningen, University Medical Center Groningen (UMCG), Department of Neurology, POB 30001, 9700 RB Groningen, The NetherlandsSearch for more papers by this author
Bauke M. de Jong MD, PhD

Bauke M. de Jong MD, PhD

Neurology Department of the University Medical Center Groningen, The Netherlands

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Nir Giladi MD

Nir Giladi MD

Neurology Department of the Tel Aviv Sourasky Medical Center, Sackler School of Medicine, Tel Aviv, Israel

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Joanna D. Schaafsma MD

Joanna D. Schaafsma MD

Neurology Department of the University Medical Center Groningen, The Netherlands

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R. Paul Maguire PhD

R. Paul Maguire PhD

Neurology Department of the University Medical Center Groningen, The Netherlands

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Lammy Veenma

Lammy Veenma

Neurology Department of the University Medical Center Groningen, The Netherlands

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Jan Pruim MD

Jan Pruim MD

PET Centre of the University Medical Center Groningen, The Netherlands

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Yacov Balash MD

Yacov Balash MD

Neurology Department of the Tel Aviv Sourasky Medical Center, Sackler School of Medicine, Tel Aviv, Israel

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Moussa B.H. Youdim MD

Moussa B.H. Youdim MD

Eve Topf and National Parkinson Foundation Centers of Excellence for Neurodegenerative Diseases, Technion-Faculty of Medicine, Haifa, Israel

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Klaus L. Leenders MD, PhD

Klaus L. Leenders MD, PhD

Neurology Department of the University Medical Center Groningen, The Netherlands

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First published: 23 May 2006
Citations: 92

Abstract

In Parkinson's disease (PD), freezing suggests sudden and transient blocks of motor behavior during initiating or continuous repetitive movements. Its underlying pathophysiology remains unclear. The objective of this study is to compare striatal dopamine metabolism and cerebral glucose metabolism between PD patients with and without freezing of gait (FOG). A total of 10 PD patients with FOG at off and 7 PD patients without FOG underwent brain positron emission tomography with 18[F]-6-fluoro-levodopa (FDOPA) and 18[F]-fluordesoxyglucose (FDG). Striatum decarboxylase activity was expressed by metabolic influx constants of the striatum related to the occipital lobe (Kocc). FDG uptake in caudate and putamen was normalized to global FDG uptake. Region of interest (ROI) analysis of striatal regions was used, as well as voxel-based analysis by statistical parametric mapping (SPM). ROI analysis did not reveal differences in striatal FDOPA and FDG uptake between the groups. SPM showed lower putaminal FDOPA uptake (P = 0.05 uncorrected) with increased FDG uptake (P = 0.01 uncorrected) in freezing PD, whereas caudate uptake of the two tracers was reduced. Freezing-related cortical FDG decrease was found in (right) parietal regions. In conclusion, in freezing PD, caudate uptake of FDG and FDOPA was reduced, whereas putamen FDOPA decrease was associated with FDG increase. Right hemisphere circuitry seemed to be more affected in freezing patients. © 2006 Movement Disorder Society