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  •   University of Thessaly Institutional Repository
  • Επιστημονικές Δημοσιεύσεις Μελών ΠΘ (ΕΔΠΘ)
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  •   University of Thessaly Institutional Repository
  • Επιστημονικές Δημοσιεύσεις Μελών ΠΘ (ΕΔΠΘ)
  • Δημοσιεύσεις σε περιοδικά, συνέδρια, κεφάλαια βιβλίων κλπ.
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Lack of replication of thirteen single-nucleotide polymorphisms implicated in Parkinson's disease: a large-scale international study

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Author
Elbaz, A.; Nelson, L. M.; Payami, H.; Ioannidis, J. P.; Fiske, B. K.; Annesi, G.; Carmine Belin, A.; Factor, S. A.; Ferrarese, C.; Hadjigeorgiou, G. M.; Higgins, D. S.; Kawakami, H.; Krüger, R.; Marder, K. S.; Mayeux, R. P.; Mellick, G. D.; Nutt, J. G.; Ritz, B.; Samii, A.; Tanner, C. M.; Van Broeckhoven, C.; Van Den Eeden, S. K.; Wirdefeldt, K.; Zabetian, C. P.; Dehem, M.; Montimurro, J. S.; Southwick, A.; Myers, R. M.; Trikalinos, T. A.
Date
2006
DOI
10.1016/S1474-4422(06)70579-8
Keyword
adult
aged
article
controlled study
disease association
DNA determination
ethnology
family history
female
gene replication
genetic heterogeneity
genetic susceptibility
genome
genome analysis
genotype
human
major clinical study
male
Parkinson disease
priority journal
single nucleotide polymorphism
Confidence Intervals
Genetic Predisposition to Disease
Humans
International Cooperation
Linkage Disequilibrium
Meta-Analysis
Meta-Analysis as Topic
Middle Aged
Odds Ratio
Polymorphism, Single Nucleotide
Metadata display
Abstract
Background: A genome-wide association study identified 13 single-nucleotide polymorphisms (SNPs) significantly associated with Parkinson's disease. Small-scale replication studies were largely non-confirmatory, but a meta-analysis that included data from the original study could not exclude all SNP associations, leaving relevance of several markers uncertain. Methods: Investigators from three Michael J Fox Foundation for Parkinson's Research-funded genetics consortia-comprising 14 teams-contributed DNA samples from 5526 patients with Parkinson's disease and 6682 controls, which were genotyped for the 13 SNPs. Most (88%) participants were of white, non-Hispanic descent. We assessed log-additive genetic effects using fixed and random effects models stratified by team and ethnic origin, and tested for heterogeneity across strata. A meta-analysis was undertaken that incorporated data from the original genome-wide study as well as subsequent replication studies. Findings: In fixed and random-effects models no associations with any of the 13 SNPs were identified (odds ratios 0·89 to 1·09). Heterogeneity between studies and between ethnic groups was low for all SNPs. Subgroup analyses by age at study entry, ethnic origin, sex, and family history did not show any consistent associations. In our meta-analysis, no SNP showed significant association (summary odds ratios 0·95 to 1.08); there was little heterogeneity except for SNP rs7520966. Interpretation: Our results do not lend support to the finding that the 13 SNPs reported in the original genome-wide association study are genetic susceptibility factors for Parkinson's disease. © 2006 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/11615/27296
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