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      Genome-wide association study identifies eight risk loci and implicates metabo-psychiatric origins for anorexia nervosa

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      Nature Genetics
      Springer Science and Business Media LLC

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          Abstract

          Characterized primarily by a low body-mass index, anorexia nervosa is a complex and serious illness1, affecting 0.9-4% of women and 0.3% of men2-4, with twin-based heritability estimates of 50-60%5. Mortality rates are higher than those in other psychiatric disorders6, and outcomes are unacceptably poor7. Here we combine data from the Anorexia Nervosa Genetics Initiative (ANGI)8,9 and the Eating Disorders Working Group of the Psychiatric Genomics Consortium (PGC-ED) and conduct a genome-wide association study of 16,992 cases of anorexia nervosa and 55,525 controls, identifying eight significant loci. The genetic architecture of anorexia nervosa mirrors its clinical presentation, showing significant genetic correlations with psychiatric disorders, physical activity, and metabolic (including glycemic), lipid and anthropometric traits, independent of the effects of common variants associated with body-mass index. These results further encourage a reconceptualization of anorexia nervosa as a metabo-psychiatric disorder. Elucidating the metabolic component is a critical direction for future research, and paying attention to both psychiatric and metabolic components may be key to improving outcomes.

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          Journal
          Nature Genetics
          Nat Genet
          Springer Science and Business Media LLC
          1061-4036
          1546-1718
          August 2019
          July 15 2019
          August 2019
          : 51
          : 8
          : 1207-1214
          Article
          10.1038/s41588-019-0439-2
          6779477
          31308545
          dc67e8f9-854d-480f-b650-215c6cb0c056
          © 2019

          http://www.springer.com/tdm

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