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Genome-Wide Association Studies of Cognitive and Motor Progression in Parkinson's Disease

Lookup NU author(s): Dr Sarah Marrinan, Professor David Burn



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020 The Authors. Movement Disorders published by Wiley Periodicals LLC. on behalf of International Parkinson and Movement Disorder SocietyBackground: There are currently no treatments that stop or slow the progression of Parkinson's disease (PD). Case–control genome-wide association studies have identified variants associated with disease risk, but not progression. The objective of the current study was to identify genetic variants associated with PD progression. Methods: We analyzed 3 large longitudinal cohorts: Tracking Parkinson's, Oxford Discovery, and the Parkinson's Progression Markers Initiative. We included clinical data for 3364 patients with 12,144 observations (mean follow-up 4.2 years). We used a new method in PD, following a similar approach in Huntington's disease, in which we combined multiple assessments using a principal components analysis to derive scores for composite, motor, and cognitive progression. These scores were analyzed in linear regression in genome-wide association studies. We also performed a targeted analysis of the 90 PD risk loci from the latest case–control meta-analysis. Results: There was no overlap between variants associated with PD risk, from case–control studies, and PD age at onset versus PD progression. The APOE ε4 tagging variant, rs429358, was significantly associated with composite and cognitive progression in PD. Conditional analysis revealed several independent signals in the APOE locus for cognitive progression. No single variants were associated with motor progression. However, in gene-based analysis, ATP8B2, a phospholipid transporter related to vesicle formation, was nominally associated with motor progression (P = 5.3 × 10−6). Conclusions: We provide early evidence that this new method in PD improves measurement of symptom progression. We show that the APOE ε4 allele drives progressive cognitive impairment in PD. Replication of this method and results in independent cohorts are needed. © 2020 The Authors. Movement Disorders published by Wiley Periodicals LLC. on behalf of International Parkinson and Movement Disorder Society.

Publication metadata

Author(s): Tan MMX, Lawton MA, Jabbari E, Reynolds RH, Iwaki H, Blauwendraat C, Kanavou S, Pollard MI, Hubbard L, Malek N, Grosset KA, Marrinan SL, Bajaj N, Barker RA, Burn DJ, Bresner C, Foltynie T, Wood NW, Williams-Gray CH, Hardy J, Nalls MA, Singleton AB, Williams NM, Ben-Shlomo Y, Hu MTM, Grosset DG, Shoai M, Morris HR

Publication type: Article

Publication status: Published

Journal: Movement Disorders

Year: 2021

Volume: 36

Issue: 2

Pages: 424-433

Print publication date: 01/02/2021

Online publication date: 28/10/2020

Acceptance date: 05/10/2020

Date deposited: 11/03/2021

ISSN (print): 0885-3185

ISSN (electronic): 1531-8257

Publisher: John Wiley and Sons Inc


DOI: 10.1002/mds.28342


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