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• W4385288049 abstract "Abstract Seed amplification assays have been implemented in Parkinson’s disease to reveal disease-specific misfolded alpha-synuclein aggregates in biospecimens. While the assays’ qualitative dichotomous seeding response is valuable to stratify and enrich cohorts for alpha-synuclein pathology in general, more quantitative parameters that are associated with clinical dynamics of disease progression and that might potentially serve as exploratory outcome measures in clinical trials targeting alpha-synuclein would add important information. To evaluated whether the seeding kinetic parameters time required to reach the seeding threshold (LAG phase), the peak of fluorescence response (Imax), and area under the curve (AUC) are associated with clinical trajectories, we analyzed LAG, Imax, and AUC in relation to the development of cognitive decline in a longitudinal cohort of 199 people with Parkinson’s disease with positive CSF alpha-synuclein seeding status. Patients were stratified into tertiles based on their individual CSF alpha-synuclein seeding kinetic properties. The effect of the kinetic parameters on longitudinal development of cognitive impairment was analyzed by Kaplan-Meier survival curves and Cox-Regression. Patients with a higher number of positive seeding replicated and tertile groups of shorter LAG, higher Imax, and higher AUC showed a higher prevalence of and a shorter duration until cognitive impairment longitudinally. Prevalence of patients carrying a GBA mutation was higher in the tertile groups of short LAG phase and high AUC. We conclude that a more prominent alpha-synuclein seeding kinetic profile translates into a more rapid development of cognitive decline." @default.
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• W4385288049 date "2023-07-26" @default.
• W4385288049 modified "2023-10-16" @default.
• W4385288049 title "CSF α-synuclein seed amplification kinetic profiles are associated with cognitive decline in PD" @default.
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• W4385288049 doi "https://doi.org/10.21203/rs.3.rs-3178181/v1" @default.
• W4385288049 hasPublicationYear "2023" @default.
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