Fine-mapping of Parkinson’s disease susceptibility loci identifies putative causal variants
Open Access
- 7 October 2021
- journal article
- research article
- Published by Oxford University Press (OUP) in Human Molecular Genetics
- Vol. 31 (6), 888-900
- https://doi.org/10.1093/hmg/ddab294
Abstract
Recent genome-wide association studies have identified 78 loci associated with Parkinson’s Disease susceptibility but the underlying mechanisms remain largely unclear. To identify variants likely causal for disease risk, we fine-mapped these Parkinson’s-associated loci using four different fine-mapping methods. We then integrated multi-assay cell-type-specific epigenomic profiles to pinpoint the likely mechanism of action of each variant, allowing us to identify Consensus SNPs that disrupt LRRK2 and FCGR2A regulatory elements in microglia, an MBNL2 enhancer in oligodendrocytes, and a DYRK1A enhancer in neurons. This genome-wide functional fine-mapping investigation of Parkinson’s Disease substantially advances our understanding of the causal mechanisms underlying this complex disease while avoiding focus on spurious, non-causal mechanisms. Together, these results provide a robust, comprehensive list of the likely causal variants, genes and cell-types underlying Parkinson’s Disease risk as demonstrated by consistently greater enrichment of our fine-mapped SNPs relative to lead GWAS SNPs across independent functional impact annotations. In addition, our approach prioritized an average of 3/85 variants per locus as putatively causal, making downstream experimental studies both more tractable and more likely to yield disease-relevant, actionable results.Funding Information
- Michael J. Fox Foundation (#14899, #16743)
- US National Institutes of Health (R01-AG054005, R01-NS116006)
This publication has 73 references indexed in Scilit:
- Common variation in the LRRK2 gene is a risk factor for Parkinson's diseaseMovement Disorders, 2012
- Identifying ChIP-seq enrichment using MACSNature Protocols, 2012
- Structural haplotypes and recent evolution of the human 17q21.31 regionNature Genetics, 2012
- Genomic inflation factors under polygenic inheritanceEuropean Journal of Human Genetics, 2011
- GCTA: A Tool for Genome-wide Complex Trait AnalysisAmerican Journal of Human Genetics, 2011
- Tabix: fast retrieval of sequence features from generic TAB-delimited filesBioinformatics, 2011
- Mapping identifiers for the integration of genomic datasets with the R/Bioconductor package biomaRtNature Protocols, 2009
- A Bayesian Measure of the Probability of False Discovery in Genetic Epidemiology StudiesAmerican Journal of Human Genetics, 2007
- BioMart and Bioconductor: a powerful link between biological databases and microarray data analysisBioinformatics, 2005
- Linkage Disequilibrium in Humans: Models and DataAmerican Journal of Human Genetics, 2001