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Pallidal Structural Changes Related to Levodopa-induced Dyskinesia in Parkinson's Disease

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Title
Pallidal Structural Changes Related to Levodopa-induced Dyskinesia in Parkinson's Disease
Author(s)
Youn, Jinyoung; Kim, Mansu; Park, Suyeon; Kim, Ji Sun; Hyunjin Park; Cho, Jin Whan
Publication Date
2022-05
Journal
FRONTIERS IN AGING NEUROSCIENCE, v.14
Publisher
FRONTIERS MEDIA SA
Abstract
BackgroundDespite the clinical impact of levodopa-induced dyskinesia (LID) in Parkinson's disease (PD), the mechanism, especially the role of basal ganglia (BG), is not fully elucidated yet. We investigated the BG structural changes related to LID in PD using a surface-based shape analysis technique. MethodsWe recruited patients with PD who developed LID within 3 years (LID group, 28 patients) and who did not develop it after 7 years (non-LID group, 35 patients) from levodopa treatment for the extreme case-control study. BG structure volumes were measured using volumetry analysis and the surface-based morphometry feature (i.e., Jacobian) from the subcortical surface vertices. We compared the volume and Jacobian of meshes in the regions between the two groups. We also performed a correlation analysis between local atrophy and the severity of LID. Additionally, we evaluated structural connectivity profiles from globus pallidus interna and externa (GPi and GPe) to other brain structures based on the group comparison. ResultsThe demographic and clinical data showed no significant difference except for disease duration, treatment duration, parkinsonism severity, and levodopa equivalent dose. The LID group had more local atrophies of vertices in the right GPi than the non-LID group, despite no difference in volumes. Furthermore, the LID group demonstrated significantly reduced structural connectivity between left GPi and thalamus. ConclusionThis is the first demonstration of distinct shape alterations of basal ganglia structures, especially GPi, related to LID in PD. Considering both direct and indirect BG pathways share the connection between GPi and thalamus, the BG pathway plays a crucial role in the development of LID.
URI
https://pr.ibs.re.kr/handle/8788114/12045
DOI
10.3389/fnagi.2022.781883
ISSN
1663-4365
Appears in Collections:
Center for Neuroscience Imaging Research (뇌과학 이미징 연구단) > 1. Journal Papers (저널논문)
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