Abstract
Objectives
Our aim is to investigate the associations of sleep disorders with cerebrospinal fluid (CSF) α-synuclein (α-syn) in healthy controls (HCs), and patients with prodromal and early Parkinson’s disease (PD).
Methods
We included a total of 575 individuals, consisting of 360 PD individuals, 46 prodromal PD individuals, and 169 HCs. Multiple linear regression models and linear mixed-effects models were used to investigate the associations of sleep disorders with baseline and longitudinal CSF α-syn. Associations between the change rates of sleep disorders and CSF α-syn were further investigated via multiple linear regression models.
Results
In PD, probable Rapid-eye-movement sleep Behavior Disorder (pRBD) (β = − 0.1199; P = 0.0444) and RBD sub-items, such as aggressive dreams (β = − 0.1652; P = 0.0072) and hurting bed partner (β = − 0.2468; P = 0.0010), contributed to lower CSF α-syn. The association between aggressive dreams and lower CSF α-syn further survived Bonferroni correction (P < 0.0036). In prodromal PD, dream-enacting (a specific RBD behavior) was significantly associated with decreased CSF α-syn during the follow-up (β = − 0.0124; P = 0.0237). HCs with daytime sleepiness when inactive-sitting in public places (β = − 0.0033; P = 0.0135) showed decreased CSF α-syn. Furthermore, increased possibilities of daytime sleepiness when sitting and reading contributed to a greater decrease of CSF α-syn in HCs (β = − 196.8779; P = 0.0433).
Conclusions
Sleep disorders were associated with decreased CSF α-syn. Sleep management may be important for disease monitoring and preventing the progression of α-syn pathology.
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Availability of data and materials
The data generated and analyzed during the current study are available in the PPMI database.
Code availability
None.
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Acknowledgements
The authors thank all of individuals who have given their time and themselves to be participants in this study. This study was supported by grants from the Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX01), National Clinical Research Center for Aging and Medicine (Huashan), ZJLab, Tianqiao and Chrissy Chen Institute, and the State Key Laboratory of Neurobiology and Frontiers Center for Brain Science of Ministry of Education, Fudan University. Data used in the preparation of the article were obtained from the Parkinson’s Progression Markers Initiative (PPMI) database (www.ppmi-info.org/data). PPMI is funded by The Michael J. Fox Foundation for Parkinson’s Research and funding partners, such as AbbVie, Avid Radiopharmaceuticals, Biogen, Bristol-Myers Squibb, Covance, Eli Lily&Co., F. Hoffman-La Roche, Ltd., GE Healthcare, Genentech, GlaxoSmithKline, Lundbeck, Merck, MesoScale Discovery, Piramal, Pfizer, and UCB (all of the PPMI funding partners found at www.ppmi-info.org/fundingpartners).
Funding
This study was supported by grants from the Shanghai Municipal Science and Technology Major Project (No.2018SHZDZX01), National Clinical Research Center for Aging and Medicine (Huashan), ZJLab, Tianqiao and Chrissy Chen Institute, and the State Key Laboratory of Neurobiology and Frontiers Center for Brain Science of Ministry of Education, Fudan University. Data used in the preparation of the article were obtained from the Parkinson’s Progression Markers Initiative (PPMI) database (www.ppmi-info.org/data). PPMI is funded by The Michael J. Fox Foundation for Parkinson’s Research and funding partners, such as AbbVie, Avid Radiopharmaceuticals, Biogen, Bristol-Myers Squibb, Covance, Eli Lily&Co., F. Hoffman-La Roche, Ltd., GE Healthcare, Genentech, GlaxoSmithKline, Lundbeck, Merck, MesoScale Discovery, Piramal, Pfizer, and UCB (all of the PPMI funding partners found at www.ppmi-info.org/fundingpartners).
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JTY, LT, and HW were responsible for the conception and design of the study. XTW, FTL, HY, YHM, and JTY: acquisition and analysis of data. XTW, FTL, HY, CZ, JTY, LT, and HW: drafting of the manuscript. YHM, JW, and QD coedited the article.
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Wang, XT., Yu, H., Liu, FT. et al. Associations of sleep disorders with cerebrospinal fluid α-synuclein in prodromal and early Parkinson’s disease. J Neurol 269, 2469–2478 (2022). https://doi.org/10.1007/s00415-021-10812-2
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DOI: https://doi.org/10.1007/s00415-021-10812-2