Beyond SNP heritability: Polygenicity and discoverability of phenotypes estimated with a univariate Gaussian mixture model.

Autor: Holland D; Center for Multimodal Imaging and Genetics, University of California at San Diego, La Jolla, California, United States of America.; Department of Neurosciences, University of California, San Diego, La Jolla, California, United States of America., Frei O; NORMENT, KG Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway., Desikan R; Department of Radiology, University of California, San Francisco, San Francisco, California, United States of America., Fan CC; Center for Multimodal Imaging and Genetics, University of California at San Diego, La Jolla, California, United States of America.; Department of Radiology, University of California, San Diego, La Jolla, California, United States of America.; Department of Cognitive Sciences, University of California at San Diego, La Jolla, California, United States of America., Shadrin AA; NORMENT, KG Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway., Smeland OB; NORMENT, KG Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.; Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway., Sundar VS; Center for Multimodal Imaging and Genetics, University of California at San Diego, La Jolla, California, United States of America.; Department of Radiology, University of California, San Diego, La Jolla, California, United States of America., Thompson P; Keck School of Medicine, University of Southern California, Los Angeles, California, United States of America., Andreassen OA; NORMENT, KG Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.; Division of Mental Health and Addiction, Oslo University Hospital, Oslo, Norway., Dale AM; Center for Multimodal Imaging and Genetics, University of California at San Diego, La Jolla, California, United States of America.; Department of Neurosciences, University of California, San Diego, La Jolla, California, United States of America.; Department of Radiology, University of California, San Diego, La Jolla, California, United States of America.; Department of Psychiatry, University of California, San Diego, La Jolla, California, United States of America.
Jazyk: angličtina
Zdroj: PLoS genetics [PLoS Genet] 2020 May 19; Vol. 16 (5), pp. e1008612. Date of Electronic Publication: 2020 May 19 (Print Publication: 2020).
DOI: 10.1371/journal.pgen.1008612
Abstrakt: Estimating the polygenicity (proportion of causally associated single nucleotide polymorphisms (SNPs)) and discoverability (effect size variance) of causal SNPs for human traits is currently of considerable interest. SNP-heritability is proportional to the product of these quantities. We present a basic model, using detailed linkage disequilibrium structure from a reference panel of 11 million SNPs, to estimate these quantities from genome-wide association studies (GWAS) summary statistics. We apply the model to diverse phenotypes and validate the implementation with simulations. We find model polygenicities (as a fraction of the reference panel) ranging from ≃ 2 × 10-5 to ≃ 4 × 10-3, with discoverabilities similarly ranging over two orders of magnitude. A power analysis allows us to estimate the proportions of phenotypic variance explained additively by causal SNPs reaching genome-wide significance at current sample sizes, and map out sample sizes required to explain larger portions of additive SNP heritability. The model also allows for estimating residual inflation (or deflation from over-correcting of z-scores), and assessing compatibility of replication and discovery GWAS summary statistics.
Competing Interests: Dr. Dale is a founder of and holds equity in CorTechs Labs, Inc, and serves on its Scientific Advisory Board. He is a member of the Scientific Advisory Board of Human Longevity, Inc. and receives funding through research agreements with General Electric Healthcare and Medtronic, Inc. The terms of these arrangements have been reviewed and approved by UCSD in accordance with its conflict of interest policies. Dr. Andreassen is a consultant for HealthLytix. The remaining authors have no competing interest.
Databáze: MEDLINE
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