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Genome-wide pleiotropy between Parkinson disease and autoimmune diseases

  • for the International Parkinson's Disease Genomics Consortium (IPDGC), United Kingdom Brain Expression Consortium (UKBEC) Investigators, North American Brain Expression Consortium (NABEC)
  • University of Oslo
  • VU University Medical Center
  • German Center for Neurodegenerative Diseases
  • University of California at San Diego
  • University of California at San Francisco
  • National Institutes of Health
  • University College London
  • University of Copenhagen
  • deCODE Genetics
  • Kiel University
  • University of Bergen
  • Norwegian Primary Sclerosing Cholangitis (PSC) Research Center
  • Sorbonne Université
  • Institut national de la santé et de la recherche médicale
  • CNRS
  • University of Tübingen
  • Paul Sabatier University
  • Landspitali University Hospital
  • Mid and South Essex NHS Foundation Trust
  • Queen Mary University of London
  • University of Cambridge
  • University of Bristol
  • Vrije Universiteit Amsterdam
  • University of Amsterdam
  • Massachusetts General Hospital
  • Broad Institute
  • Radboud University Nijmegen
  • Newcastle University
  • University of Birmingham
  • Sandwell and West Birmingham Hospitals NHS Trust
  • University of Aberdeen
  • Department of Neurology
  • Wellcome Trust Sanger Institute
  • University Hospital of Schleswig-Holstein
  • Imperial College London
  • Hôpital Gabriel Montpied
  • Washington University St. Louis
  • Leiden University
  • Erasmus University Rotterdam
  • AARP
  • University of Oxford
  • Pennsylvania State University
  • Helmholtz Zentrum München - German Research Center for Environmental Health
  • Université de Lille
  • University Hospitals Birmingham NHS Foundation Trust
  • Cardiff University
  • CHU de Grenoble
  • Biogen IDEC
  • University of Rochester
  • Baylor College of Medicine
  • University of Edinburgh
  • Parkinson's Institute
  • Hopital Haut-Leveque
  • University of Maryland, Baltimore
  • Johns Hopkins University
  • Genentech Incorporated
  • King's College London

Research output: Contribution to journalArticlepeer-review

Abstract

IMPORTANCE: Recent genome-wide association studies (GWAS) and pathway analyses supported long-standing observations of an association between immune-mediated diseases and Parkinson disease (PD). The post-GWAS era provides an opportunity for cross-phenotype analyses between different complex phenotypes. OBJECTIVES: To test the hypothesis that there are common genetic risk variants conveying risk of both PD and autoimmune diseases (ie, pleiotropy) and to identify new shared genetic variants and their pathways by applying a novel statistical framework in a genome-wide approach. DESIGN, SETTING, AND PARTICIPANTS: Using the conjunction false discovery rate method, this study analyzed GWAS data from a selection of archetypal autoimmune diseases among 138 511 individuals of European ancestry and systemically investigated pleiotropy between PD and type 1 diabetes, Crohn disease, ulcerative colitis, rheumatoid arthritis, celiac disease, psoriasis, and multiple sclerosis. NeuroX data (6927 PD cases and 6108 controls) were used for replication. The study investigated the biological correlation between the top loci through protein-protein interaction and changes in the gene expression and methylation levels. The dates of the analysis were June 10, 2015, to March 4, 2017. MAIN OUTCOMES AND MEASURES: The primary outcomewas a list of novel loci and their pathways involved in PD and autoimmune diseases. RESULTS: Genome-wide conjunctional analysis identified 17 novel loci at false discovery rate less than 0.05 with overlap between PD and autoimmune diseases, including known PD loci adjacent to GAK, HLA-DRB5, LRRK2, and MAPT for rheumatoid arthritis, ulcerative colitis and Crohn disease. Replication confirmed the involvement of HLA, LRRK2, MAPT, TRIM10, and SETD1A in PD. Among the novel genes discovered, WNT3, KANSL1, CRHR1, BOLA2, and GUCY1A3 are within a protein-protein interaction network with known PD genes. A subset of novel loci was significantly associated with changes inmethylation or expression levels of adjacent genes. CONCLUSIONS AND RELEVANCE: The study findings provide novel mechanistic insights into PD and autoimmune diseases and identify a common genetic pathway between these phenotypes. The results may have implications for future therapeutic trials involving anti-inflammatory agents.

Original languageEnglish
Pages (from-to)780-792
Number of pages13
JournalJAMA Neurology
Volume74
Issue number7
DOIs
Publication statusPublished - Jul 2017
Externally publishedYes

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