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Schizophrenia polygenic risk score influence on white matter microstructure

Research output: Contribution to journalArticlepeer-review

Beatriz Simões, Evangelos Vassos, Sukhi Shergill, Colm McDonald, Timothea Toulopoulou, Sridevi Kalidindi, Fergus Kane, Robin Murray, Elvira Bramon, Hugo Ferreira, Diana Prata

Original languageEnglish
Pages (from-to)62-67
Number of pages6
JournalJournal of psychiatric research
Published1 Feb 2020

King's Authors


Schizophrenia (SZ) and bipolar disorder (BD) are highly heritable, share symptomatology, and have a polygenic architecture. The impact of recent polygenic risk scores (PRS) for psychosis, which combine multiple genome-wide associated risk variations, should be assessed on heritable brain phenotypes also previously associated with the illnesses, for a better understanding of the pathways to disease. We have recently reported on the current SZ PRS's ability to predict 1st episode of psychosis case-control status and general cognition. Herein, we test its penetrance on white matter microstructure, which is known to be impaired in SZ, in BD and their relatives, using 141 participants (including SZ, BP, relatives of SZ or BP patients, and healthy volunteers), and two white matter integrity indexes: fractional anisotropy (FA) and mean diffusivity (MD). No significant correlation between the SZ PRS and FA or MD was found, thus it remains unclear whether white matter changes are primarily associated with SZ genetic risk profiles.

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