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Nalls, M.A.* ; Saad, M.* ; Noyce, A.J.* ; Keller, M.F.* ; Schrag, A.* ; Bestwick, J.P.* ; Traynor, B.J.* ; Gibbs, J.R.* ; Hernandez, D.G.* ; Cookson, M.R.* ; Morris, H.R.* ; Williams, N.* ; Gasser, T.* ; Heutink, P.* ; Wood, N.* ; Hardy, J.* ; Martinez, M.* ; Singleton, A.B.* ; International Parkinson's Disease Genomics Consortium (IPDGC) (Illig, T. ; Lichtner, P.) ; Wellcome Trust Case Control Consortium 2 (WTCCC2) (*) ; North American Brain Expression Consortium (*) ; United Kingdom Brain Expression Consortium (UKBEC) (*)

Genetic comorbidities in Parkinson's disease.

Hum. Mol. Genet. 23, 831-841 (2014)
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Parkinson's disease (PD) has a number of known genetic risk factors. Clinical and epidemiological studies have suggested the existence of intermediate factors that may be associated with additional risk of PD. We construct genetic risk profiles for additional epidemiological and clinical factors using known genome-wide association studies (GWAS) loci related to these specific phenotypes to estimate genetic comorbidity in a systematic review. We identify genetic risk profiles based on GWAS variants associated with schizophrenia and Crohn's disease as significantly associated with risk of PD. Conditional analyses adjusting for SNPs near loci associated with PD and schizophrenia or PD and Crohn's disease suggest that spatially overlapping loci associated with schizophrenia and PD account for most of the shared comorbidity, while variation outside of known proximal loci shared by PD and Crohn's disease accounts for their shared genetic comorbidity. We examine brain methylation and expression signatures proximal to schizophrenia and Crohn's disease loci to infer functional changes in the brain associated with the variants contributing to genetic comorbidity. We compare our results with a systematic review of epidemiological literature, while the findings are dissimilar to a degree; marginal genetic associations corroborate the directionality of associations across genetic and epidemiological data. We show a strong genetically defined level of comorbidity between PD and Crohn's disease as well as between PD and schizophrenia, with likely functional consequences of associated variants occurring in brain.
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Publication type Article: Journal article
Document type Scientific Article
Keywords Genome-wide Association; Inflammatory-bowel-disease; Psoriasis Susceptibility Loci; C-reactive Protein; Colitis-risk Loci; Mendelian Randomization; Sequence Variants; Common Variants; Identifies 3; Cardiovascular-disease
Language english
Publication Year 2014
HGF-reported in Year 2015
ISSN (print) / ISBN 0964-6906
e-ISSN 1460-2083
Journal Human Molecular Genetics
Quellenangaben Volume: 23, Issue: 3, Pages: 831-841 Article Number: , Supplement: ,
Publisher Oxford University Press
Publishing Place Oxford
Reviewing status Peer reviewed
Institute(s) Institute of Human Genetics (IHG)
POF-Topic(s) 30501 - Systemic Analysis of Genetic and Environmental Factors that Impact Health
Research field(s) Genetics and Epidemiology
PSP Element(s) G-500700-001
DOI 10.1093/hmg/ddt465
WOS ID WOS:000330841700022
Erfassungsdatum 2015-04-07
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