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Sustained striatal dopamine levels following intestinal levodopa infusions in Parkinson's disease patients

Lookup NU author(s): Professor Nicola PaveseORCiD, Professor David BrooksORCiD


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© 2016 International Parkinson and Movement Disorder Society Background: The objective of this study was to investigate in vivo the ability of levodopa/carbidopa intestinal gel infusions to produce sustained striatal dopamine levels and to improve clinical outcomes in Parkinson's disease patients. Methods: Six advanced Parkinson's disease patients had serial [11C]raclopride PET to assess levodopa/carbidopa intestinal gel infusion-induced rises in striatal dopamine as reflected by a fall in dopamine-D2/3 receptor availability. Parkinson's disease patients had baseline scan OFF-dopaminergic stimulation and 2 scans following initiation of levodopa/carbidopa intestinal gel infusions. Striatal D2/3 binding was measured in striatal subregions corresponding to sensorimotor, limbic, and cognitive/associative function. Results: Mean striatal [11C]raclopride nondisplaceable binding potential decreased by 14.0% to 16.7% in sensorimotor, 12.0%-14.4% in limbic, and 8.7%-11.6% in cognitive/associative function subregions at 1- to 10-hour points (P < 0.01). Sensorimotor subregion [11C]raclopride nondisplaceable binding potential reductions correlated with reductions in Unified Parkinson's Disease Rating Scale Part III scores over the course of the infusion (r = 0.81; P < 0.05). Conclusions: Levodopa/carbidopa intestinal gel infusions generate a stable rise in striatal dopamine levels and are associated with improvements in motor manifestations. © 2016 International Parkinson and Movement Disorder Society.

Publication metadata

Author(s): Politis M, Sauerbier A, Loane C, Pavese N, Martin A, Corcoran B, Brooks DJ, Ray-Chaudhuri K, Piccini P

Publication type: Article

Publication status: Published

Journal: Movement Disorders

Year: 2017

Volume: 32

Issue: 2

Pages: 235-240

Print publication date: 01/02/2017

Online publication date: 17/11/2016

Acceptance date: 06/09/2016

ISSN (print): 0885-3185

ISSN (electronic): 1531-8257

Publisher: John Wiley and Sons Inc.


DOI: 10.1002/mds.26848


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