Publication Date
2014
Journal Title
Hum Mol Genet
Abstract
The recent series of large genome-wide association studies in European and Japanese cohorts established that Parkinson disease (PD) has a substantial genetic component. To further investigate the genetic landscape of PD, we performed a genome-wide scan in the largest to date Ashkenazi Jewish cohort of 1130 Parkinson patients and 2611 pooled controls. Motivated by the reduced disease allele heterogeneity and a high degree of identical-by-descent (IBD) haplotype sharing in this founder population, we conducted a haplotype association study based on mapping of shared IBD segments. We observed significant haplotype association signals at three previously implicated Parkinson loci: LRRK2 (OR = 12.05, P = 1.23 x 10(-56)), MAPT (OR = 0.62, P = 1.78 x 10(-11)) and GBA (multiple distinct haplotypes, OR > 8.28, P = 1.13 x 10(-11) and OR = 2.50, P = 1.22 x 10(-9)). In addition, we identified a novel association signal on chr2q14.3 coming from a rare haplotype (OR = 22.58, P = 1.21 x 10(-10)) and replicated it in a secondary cohort of 306 Ashkenazi PD cases and 2583 controls. Our results highlight the power of our haplotype association method, particularly useful in studies of founder populations, and reaffirm the benefits of studying complex diseases in Ashkenazi Jewish cohorts.
Volume Number
23
Issue Number
17
Pages
4693-4702
Document Type
Article
Status
Faculty, Northwell Researcher
Facility
School of Medicine
Primary Department
Psychiatry
Additional Departments
Molecular Medicine
PMID
DOI
10.1093/hmg/ddu158