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Exploration of Haplotype Research Consortium Imputation for Genome University of Dundee Exploration of haplotype research consortium imputation for genome-wide association studies in 20,032 Generation Scotland participants Nagy, Reka; Boutin, Thibaud S.; Marten, Jonathan; Huffman, Jennifer E.; Kerr, Shona M.; Campbell, Archie Published in: Genome Medicine DOI: 10.1186/s13073-017-0414-4 Publication date: 2017 Licence: CC BY Document Version Publisher's PDF, also known as Version of record Link to publication in Discovery Research Portal Citation for published version (APA): Nagy, R., Boutin, T. S., Marten, J., Huffman, J. E., Kerr, S. M., Campbell, A., Evenden, L., Gibson, J., Amador, C., Howard, D. M., Navarro, P., Morris, A., Deary, I. J., Hocking, L. J., Padmanabhan, S., Smith, B. H., Joshi, P., Wilson, J. F., Hastie, N. D., ... Hayward, C. (2017). Exploration of haplotype research consortium imputation for genome-wide association studies in 20,032 Generation Scotland participants. Genome Medicine, 9, 1-14. [23]. https://doi.org/10.1186/s13073-017-0414-4 General rights Copyright and moral rights for the publications made accessible in Discovery Research Portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from Discovery Research Portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain. • You may freely distribute the URL identifying the publication in the public portal. Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Download date: 25. Sep. 2021 Nagy et al. Genome Medicine (2017) 9:23 DOI 10.1186/s13073-017-0414-4 RESEARCH Open Access Exploration of haplotype research consortium imputation for genome-wide association studies in 20,032 Generation Scotland participants Reka Nagy1, Thibaud S. Boutin1, Jonathan Marten1, Jennifer E. Huffman1, Shona M. Kerr1, Archie Campbell2, Louise Evenden3, Jude Gibson3, Carmen Amador1, David M. Howard4, Pau Navarro1, Andrew Morris5, Ian J. Deary6, Lynne J. Hocking7, Sandosh Padmanabhan8, Blair H. Smith9, Peter Joshi10, James F. Wilson10, Nicholas D. Hastie1, Alan F. Wright1, Andrew M. McIntosh4,6, David J. Porteous2,6, Chris S. Haley1, Veronique Vitart1 and Caroline Hayward1* Abstract Background: The Generation Scotland: Scottish Family Health Study (GS:SFHS) is a family-based population cohort with DNA, biological samples, socio-demographic, psychological and clinical data from approximately 24,000 adult volunteers across Scotland. Although data collection was cross-sectional, GS:SFHS became a prospective cohort due to of the ability to link to routine Electronic Health Record (EHR) data. Over 20,000 participants were selected for genotyping using a large genome-wide array. Methods: GS:SFHS was analysed using genome-wide association studies (GWAS) to test the effects of a large spectrum of variants, imputed using the Haplotype Research Consortium (HRC) dataset, on medically relevant traits measured directly or obtained from EHRs. The HRC dataset is the largest available haplotype reference panel for imputation of variants in populations of European ancestry and allows investigation of variants with low minor allele frequencies within the entire GS:SFHS genotyped cohort. Results: Genome-wide associations were run on 20,032 individuals using both genotyped and HRC imputed data. We present results for a range of well-studied quantitative traits obtained from clinic visits and for serum urate measures obtained from data linkage to EHRs collected by the Scottish National Health Service. Results replicated known associations and additionally reveal novel findings, mainly with rare variants, validating the use of the HRC imputation panel. For example, we identified two new associations with fasting glucose at variants near to Y_RNA and WDR4 and four new associations with heart rate at SNPs within CSMD1 and ASPH, upstream of HTR1F and between PROKR2 and GPCPD1. All were driven by rare variants (minor allele frequencies in the range of 0.08–1%).Proofofprinciple for use of EHRs was verification of the highly significant association of urate levels with the well-established urate transporter SLC2A9. (Continued on next page) * Correspondence: [email protected] 1MRC Human Genetics Unit, University of Edinburgh, Institute of Genetics and Molecular Medicine, Western General Hospital, Crewe Road, Edinburgh EH4 2XU, UK Full list of author information is available at the end of the article © The Author(s). 2017 Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. Nagy et al. Genome Medicine (2017) 9:23 Page 2 of 14 (Continued from previous page) Conclusions: GS:SFHS provides genetic data on over 20,000 participants alongside a range of phenotypes as well as linkage to National Health Service laboratory and clinical records. We have shown that the combination of deeper genotype imputation and extended phenotype availability make GS:SFHS an attractive resource to carry out association studies to gain insight into the genetic architecture of complex traits. Keywords: Genome-wide association studies (GWAS), Electronic health records, Imputation, Quantitative trait, Genetics, Urate, Heart rate, Glucose, Haplotype Research Consortium (HRC) Background across the allele spectrum. A selected subset of 428 Generation Scotland is a multi-institution collaboration GS:SFHS participants had their exomes sequenced at that has created an ethically sound, family-based and high depth and contributed reference haplotypes to the population-based resource for identifying the genetic HRC dataset, making it ideal for more accurate imput- basis of common complex diseases [1–3]. The Scottish ation of this cohort [6]. Family Health Study component (GS:SFHS) has DNA and This paper describes genome-wide association analysis of sociodemographic, psychological and clinical data from over 20,000 GS:SFHS participants using two genetic data- ~24,000 adult volunteers from across Scotland. The ethni- sets (common, genotyped Single Nucleotide Polymorphisms city of the cohort is 99% Caucasian, with 96% born in the (SNPs) and HRC-imputed data) across a range of medically UK and 87% in Scotland. Features of GS:SFHS include the relevant quantitative phenotypes measured at recruitment family-based recruitment, breadth and depth of phenotype in research clinics. To illustrate the quality and potential of information, ‘broad’ consent from participants to use their the many EHR linkage-derived phenotypes available, we data and samples for a wide range of medical research and selected serum urate as an exemplar due to its direct associ- for re-contact, and consent and mechanisms for linkage of ation with disease, gout, and its strong well-studied genetic all data to comprehensive routine healthcare records. associations. About 10% of people with hyperuricemia These features were designed to maximise the power of develop gout, an inflammatory arthritis that results from the resource to identify, replicate or control for genetic deposition of monosodium urate crystals in the joint. factors associated with a wide spectrum of illnesses and Genome-wide meta-analyses have identified 31 genome- risk factors [3]. wide significant urate-associated SNPs, with SLC2A9 alone GS:SFHS can also be utilised as a longitudinal cohort explaining ~3% of the phenotypic variance [7]. due to the ability to link to routine Scottish National Health Service (NHS) data. Electronic Health Record Methods (EHR) linkage uses the ten-digit community health index Sample selection (CHI) number, a unique identifying number allocated to Selection criteria for genome-wide genotype analysis of every person in Scotland registered with a General Practi- the participants were: Caucasian ethnicity; born in the tioner (GP), and used for all NHS procedures (registrations, UK (prioritising those born in Scotland); and full phenotype attendances, samples, prescribing and investigations). This data available from attendance at a Generation Scotland unique patient identifier allows healthcare records for indi- research clinic. The participants were also selected to have viduals to be linked across time and location [4]. The consented for their data to be linkable to their NHS population is relatively stable with comparatively low levels electronic medical records using the CHI number. The of geographic mobility and there is relatively little uptake GS:SFHS genotyped set consisted of 20,195 participants, of private healthcare in the population. Few countries, before quality control exclusions. other than Scotland, have health service information which combines high quality data, consistency, national coverage DNA extraction and genotyping and the ability to link data to allow for genetic
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