Genome-Wide Association Study Reveals First Locus for Anorexia Nervosa and Metabolic Correlations
HHS Public Access Author manuscript Author ManuscriptAuthor Manuscript Author Am J Psychiatry Manuscript Author . Author Manuscript Author manuscript; available in PMC 2018 September 01. Published in final edited form as: Am J Psychiatry. 2017 September 01; 174(9): 850–858. doi:10.1176/appi.ajp.2017.16121402. Genome-Wide Association Study Reveals First Locus for Anorexia Nervosa and Metabolic Correlations Laramie Duncan, PhD, Zeynep Yilmaz, PhD, Raymond Walters, PhD, Jackie Goldstein, PhD, Verneri Anttila, PhD, Brendan Bulik-Sullivan, PhD, Stephan Ripke, MD, PhD, Eating Disorders Working Group of the Psychiatric Genomics Consortium, Laura Thornton, PhD, Anke Hinney, PhD, Mark Daly, PhD, Patrick Sullivan, MD, FRANZCP, Eleftheria Zeggini, PhD, Gerome Breen, PhD, and Cynthia Bulik, PhD Abstract Objective—To conduct a genome-wide association study (GWAS) of anorexia nervosa and to calculate genetic correlations with a series of psychiatric, educational, and metabolic phenotypes. Method—Following uniform quality control and imputation using the 1000 Genomes Project (phase 3) in 12 case-control cohorts comprising 3,495 anorexia nervosa cases and 10,982 controls, we performed standard association analysis followed by a meta-analysis across cohorts. Linkage disequilibrium score regression (LDSC) was used to calculate genome-wide common variant heritability [ , partitioned heritability, and genetic correlations (rg)] between anorexia nervosa and other phenotypes. Results—Results were obtained for 10,641,224 single nucleotide polymorphisms (SNPs) and insertion-deletion variants with minor allele frequency > 1% and imputation quality scores > 0.6. The of anorexia nervosa was 0.20 (SE=0.02), suggesting that a substantial fraction of the twin-based heritability arises from common genetic variation.
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