Eating disorders—including anorexia nervosa (AN), bulimia nervosa and
binge-eating disorder—are clinically distinct but exhibit symptom
overlap and diagnostic crossover. Genomic analyses have mostly examined
AN. Here we conducted a genomic meta-analysis of case–control studies of
binge-eating behavior (BE; 39,279 cases, 1,227,436 controls), alongside
analyses of AN (24,223 cases, 1,243,971 controls) and its subtypes (all
European ancestries). We identified six BE-associated loci, including
loci associated with a higher body mass index and impulse-control
behaviors. AN genome-wide association studies yielded eight loci,
validating six loci. Subsequent polygenic risk score analysis
demonstrated an association with AN in two East Asian ancestry studies.
BE and AN exhibited similar positive genetic correlations with
psychiatric disorders but opposing genetic correlations with
anthropometric traits. Most of the genetic signal in BE and AN was not
shared with body mass index. We have extended eating disorder genomics
beyond AN; future work will incorporate multiple diagnoses and global
ancestries.
SchlagwörterAnorexia Nervosa ; Bulimia Nervosa ; Body Mass Index ; Eating Disorders ; Genome-wide Association Study ; Phenotype ; Genomics ; Anthropometry ; Genetic Association