Generalized anxiety disorder and major depressive disorder comorbidity: an example of genetic pleiotropy?

Abstract excerpt

Generalized anxiety disorder (GAD) and major depressive disorder (MDD) are the most common type of anxiety-mood comorbidity. Up to 80% of subjects with lifetime GAD also have a comorbid mood disorder during their lifetime. Many hypotheses have been raised to explain such high comorbidity. Pleiotropy, i.e. a single genetic mutation explains (apparently) different disorders, is one of them and is hereby reviewed....

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