Meta-analysis of Parkinson's Disease: Identification of a Novel Locus, RIT2
Nathan Pankratz,Gary W. Beecham,Anita L. DeStefano,Ted M. Dawson,Kimberly F. Doheny,Stewart A. Factor,Taye H. Hamza,Albert Y. Hung,Bradley T. Hyman,Adrian J. Ivinson,Dmitri Krainc,Jeanne C. Latourelle,Lorraine N. Clark,Karen Marder,Eden R. Martin,Richard Mayeux,Owen A. Ross,Clemens R. Scherzer,David Simon,Caroline M. Tanner,Jeffery M. Vance,Zbigniew K. Wszolek,Cyrus P. Zabetian,Richard H. Myers,Haydeh Payami,William K. Scott,Tatiana Foroud +26 more
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TLDR
Genome‐wide association methods have identified genes contributing to Parkinson's disease (PD); this work sought to identify additional genes associated with PD susceptibility.Abstract:
Objective: Genome-wide association (GWAS) methods have identified genes contributing to Parkinson’s disease (PD); we sought to identify additional genes associated with PD susceptibility. Methods: A 2-stage design was used. First, individual level genotypic data from 5 recent PD GWAS (Discovery Sample: 4,238 PD cases and 4,239 controls) were combined. Following imputation, a logistic regression model was employed in each dataset to test for association with PD susceptibility and results from each dataset were metaanalyzed. Second, 768 single-nucleotide polymorphisms (SNPs) were genotyped in an independent Replication Sample (3,738 cases and 2,111 controls). Results: Genome-wide significance was reached for SNPs in SNCA (rs356165; G: odds ratio [OR] ¼ 1.37; p ¼ 9.3 � 10 � 21 ), MAPT (rs242559; C: OR ¼ 0.78; p ¼ 1.5 � 10 � 10 ), GAK/DGKQ (rs11248051; T: OR ¼ 1.35; p ¼ 8.2 � 10 � 9 / rs11248060; T: OR ¼ 1.35; p ¼ 2.0 � 10 � 9 ), and the human leukocyte antigen (HLA) region (rs3129882; A: OR ¼ 0.83; p ¼ 1.2 � 10 � 8 ), which were previously reported. The Replication Sample confirmed the associations with SNCA, MAPT, and the HLA region and also with GBA (E326K; OR ¼ 1.71; p ¼ 5 � 10 � 8 Combined Sample) (N370; OR ¼ 3.08; p ¼ 7 � 10 � 5 Replication sample). A novel PD susceptibility locus, RIT2, on chromosome 18 (rs12456492; p ¼ 5 � 10 � 5 Discovery Sample; p ¼ 1.52 � 10 � 7 Replication sample; p ¼ 2 � 10 � 10 Combined Sample) was replicated. Conditional analyses within each of the replicated regions identified distinct SNP associations within GBA and SNCA, suggesting that there may be multiple risk alleles within these genes. Interpretation: We identified a novel PD susceptibility locus, RIT2, replicated several previously identified loci, and identified more than 1 risk allele within SNCA and GBA. ANN NEUROL 2012;71:370–384read more
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Genome-wide association study reveals genetic risk underlying Parkinson's disease
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TL;DR: It is demonstrated that an unequivocal role for common genetic variants in the etiology of typical PD and population-specific genetic heterogeneity in this disease is suggested, and supporting evidence that common variation around LRRK2 modulates risk for PD is provided.
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