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LRRK2 exonic variants and risk of multiple system atrophy

Lookup NU author(s): Professor Patrick Chinnery, Dr Michael Keogh, Dr Claire Troakes


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Objective:The aim of this study was to evaluate the association between common exonic variants in the leucine-rich repeat kinase 2 (LRRK2) gene and risk of multiple system atrophy (MSA).Methods:One series from the United States (92 patients with pathologically confirmed MSA, 416 controls) and a second series from the United Kingdom (85 patients with pathologically confirmed MSA, 352 controls) were included in this case-control study. We supplemented these data with those of 53 patients from the United States with clinically probable or possible MSA. Seventeen common LRRK2 exonic variants were genotyped and assessed for association with MSA.Results:In the combined series of 177 patients with pathologically confirmed MSA and 768 controls, there was a significant association between LRRK2 p.M2397T and MSA (odds ratio [OR] = 0.60, p = 0.002). This protective effect was observed more strongly in the US series (OR = 0.46, p = 0.0008) than the UK series (OR = 0.82, p = 0.41). We observed other noteworthy associations with MSA for p.G1624G (OR = 0.63, p = 0.006) and p.N2081D (OR = 0.15, p = 0.010). The p.G1624G-M2397T haplotype was significantly associated with MSA in the US series (p < 0.0001) and combined series (p = 0.003) but not the UK series (p = 0.67). Results were consistent when additionally including the US patients with clinical MSA, where the strongest single-variant association was again observed for p.M2397T (OR = 0.59, p = 0.0005).Conclusions:These findings provide evidence that LRRK2 exonic variants may contribute to susceptibility to MSA. Validation in other series and meta-analytic studies will be important.

Publication metadata

Author(s): Heckman MG, Schottlaender L, Soto-Ortolaza AI, Diehl NN, Rayaprolu S, Ogaki K, Fujioka S, Murray ME, Cheshire WP, Uitti RJ, Wszolek ZK, Farrer MJ, Sailer A, Singleton AB, Chinnery PF, Keogh MJ, Gentleman SM, Holton JL, Aoife K, Mann DMA, Al-Sarraj S, Troakes C, Dickson DW, Houlden H, Ross OA

Publication type: Article

Publication status: Published

Journal: Neurology

Year: 2014

Volume: 83

Issue: 24

Pages: 2256-2261

Print publication date: 09/12/2014

Online publication date: 05/11/2014

Acceptance date: 10/09/2014

ISSN (print): 0028-3878

ISSN (electronic): 1526-632X

Publisher: Lippincott Williams & Wilkins


DOI: 10.1212/WNL.0000000000001078


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Funder referenceFunder name
Department of Health's NIHR Biomedical Research Centres funding scheme
Multiple System Atrophy Trust
Canada Excellence Research Chairs program
Cundill Foundation
Dr. Donald Rix BC Leadership Chair
Michael J. Fox Foundation for Parkinson's Research
Reta Lila Weston Institute for Neurological Studies
P50 NS072187NIH/National Institute of Neurological Disorders and Stroke
R01 NS078086National Institute of Neurological Disorders and Stroke