Polygenic risk score-based phenome-wide association study identifies novel associations for Tourette syndrome
Tourette Syndrome (TS) is a complex neurodevelopmental disorder characterized by vocal and motor tics lasting more than a year. It is highly polygenic in nature with both rare and common previously associated variants. Epidemiological studies have shown TS to be correlated with other phenotypes, but large-scale phenome wide analyses in biobank level data have not been performed to date. In this study, by CGM investigator Jeremiah Scharf and colleagues, summary statistics from the latest meta-analysis of TS were used to calculate the polygenic risk score (PRS) of individuals in the UK Biobank data and applied a Phenome Wide Association Study (PheWAS) approach to determine the association of disease risk with a wide range of phenotypes. A total of 57 traits were found to be significantly associated with TS polygenic risk, including multiple psychosocial factors and mental health conditions such as anxiety disorder and depression. Additional associations were observed with complex non-psychiatric disorders such as type 2 diabetes, heart palpitations, and respiratory conditions. This analysis provides further evidence of shared genetic and phenotypic architecture of different complex disorders.