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Published in: Neurological Sciences 12/2021

Open Access 01-12-2021 | Parkinson's Disease | Original Article

Extra-basal ganglia iron content and non-motor symptoms in drug-naïve, early Parkinson’s disease

Authors: Minkyeong Kim, Seulki Yoo, Doyeon Kim, Jin Whan Cho, Ji Sun Kim, Jong Hyun Ahn, Jun Kyu Mun, Inyoung Choi, Seung-Kyun Lee, Jinyoung Youn

Published in: Neurological Sciences | Issue 12/2021

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Abstract

Background

Although iron dyshomeostasis is associated with Parkinson’s disease (PD) pathogenesis, the relationship between iron deposition and non-motor involvement in PD is not fully understood. In this study, we investigated basal ganglia and extra-basal ganglia system iron contents and their correlation with non-motor symptoms in drug-naïve, early-stage PD patients.

Methods

We enrolled 14 drug-naïve, early-stage PD patients and 12 age/sex-matched normal controls. All participants underwent brain magnetic resonance imaging to obtain the effective transverse relaxation rate (R2*) and quantitative susceptibility mapping (QSM). Deep brain structures, including the nucleus accumbens, caudate nucleus, putamen, globus pallidus, thalamus, hippocampus, and amygdala, were delineated using the FSL-FIRST; the substantia nigra, red nucleus, and dentate nucleus were segmented manually. Inter-group differences in R2* and QSM values, as well as their association with clinical parameters of PD, were investigated.

Results

Substantia nigra and putamen R2* values were significantly higher in PD patients than in normal controls, despite no significant difference in QSM values. Regarding the non-motor symptom scales, PD sleep scale score negatively correlated with R2* values in the red nucleus and right amygdala, Scales for Outcomes in Parkinson’s disease-Autonomic scores were positively correlated with R2* values in the right amygdala and left hippocampus, and cardiovascular sub-score of Non-Motor Symptoms Scale for PD was positively associated with the QSM value in the left hippocampus.

Conclusion

In this study, iron content in the extra-basal ganglia system was significantly correlated with non-motor symptoms, especially sleep problems and dysautonomia, even in early-stage PD.
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Metadata
Title
Extra-basal ganglia iron content and non-motor symptoms in drug-naïve, early Parkinson’s disease
Authors
Minkyeong Kim
Seulki Yoo
Doyeon Kim
Jin Whan Cho
Ji Sun Kim
Jong Hyun Ahn
Jun Kyu Mun
Inyoung Choi
Seung-Kyun Lee
Jinyoung Youn
Publication date
01-12-2021
Publisher
Springer International Publishing
Published in
Neurological Sciences / Issue 12/2021
Print ISSN: 1590-1874
Electronic ISSN: 1590-3478
DOI
https://doi.org/10.1007/s10072-021-05223-0

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