Generalised Anxiety Disorder--A Twin Study of Genetic Architecture, Genome-Wide Association and Differential Gene Expression. Academic Article uri icon


  • Generalised Anxiety Disorder (GAD) is a common anxiety-related diagnosis, affecting approximately 5% of the adult population. One characteristic of GAD is a high degree of anxiety sensitivity (AS), a personality trait which describes the fear of arousal-related sensations. Here we present a genome-wide association study of AS using a cohort of 730 MZ and DZ female twins. The GWAS showed a significant association for a variant within the RBFOX1 gene. A heritability analysis of the same cohort also confirmed a significant genetic component with h2 of 0.42. Additionally, a subset of the cohort (25 MZ twins discordant for AS) was studied for evidence of differential expression using RNA-seq data. Significant differential expression of two exons with the ITM2B gene within the discordant MZ subset was observed, a finding that was replicated in an independent cohort. While previous research has shown that anxiety has a high comorbidity with a variety of psychiatric and neurodegenerative disorders, our analysis suggests a novel etiology specific to AS.

published proceedings

  • PLoS One

altmetric score

  • 27.45

author list (cited authors)

  • Davies, M. N., Verdi, S., Burri, A., Trzaskowski, M., Lee, M., Hettema, J. M., ... Spector, T. D.

citation count

  • 32

complete list of authors

  • Davies, Matthew N||Verdi, Serena||Burri, Andrea||Trzaskowski, Maciej||Lee, Minyoung||Hettema, John M||Jansen, Rick||Boomsma, Dorret I||Spector, Tim D

editor list (cited editors)

  • Hu, V. W.

publication date

  • August 2015