Title |
Generalised Anxiety Disorder – A Twin Study of Genetic Architecture, Genome-Wide Association and Differential Gene Expression
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Published in |
PLOS ONE, August 2015
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DOI | 10.1371/journal.pone.0134865 |
Pubmed ID | |
Authors |
Matthew N. Davies, Serena Verdi, Andrea Burri, Maciej Trzaskowski, Minyoung Lee, John M. Hettema, Rick Jansen, Dorret I. Boomsma, Tim D. Spector |
Abstract |
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. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United Kingdom | 6 | 24% |
United States | 4 | 16% |
Sweden | 1 | 4% |
Spain | 1 | 4% |
Canada | 1 | 4% |
Russia | 1 | 4% |
Unknown | 11 | 44% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 18 | 72% |
Scientists | 4 | 16% |
Practitioners (doctors, other healthcare professionals) | 2 | 8% |
Science communicators (journalists, bloggers, editors) | 1 | 4% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 123 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Bachelor | 28 | 23% |
Researcher | 15 | 12% |
Student > Master | 11 | 9% |
Student > Doctoral Student | 9 | 7% |
Student > Ph. D. Student | 9 | 7% |
Other | 20 | 16% |
Unknown | 31 | 25% |
Readers by discipline | Count | As % |
---|---|---|
Psychology | 25 | 20% |
Agricultural and Biological Sciences | 14 | 11% |
Medicine and Dentistry | 13 | 11% |
Biochemistry, Genetics and Molecular Biology | 9 | 7% |
Neuroscience | 8 | 7% |
Other | 17 | 14% |
Unknown | 37 | 30% |