Polygenic risk for schizophrenia affects working memory and its neural correlates in healthy subjects
Schizophrenia is a disorder with a high heritability. Patients as well as their first degree relatives display lower levels of performance in a number of cognitive domains compared to subjects without genetic risk. Several studies could link these aberrations to single genetic variants, however, onl...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
July 2018
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| In: |
Schizophrenia research
Year: 2018, Volume: 197, Pages: 315-320 |
| ISSN: | 1573-2509 |
| DOI: | 10.1016/j.schres.2018.01.013 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.schres.2018.01.013 Verlag, lizenzpflichtig, Volltext: http://www.sciencedirect.com/science/article/pii/S0920996418300331 
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| Author Notes: | Axel Krug, Bruno Dietsche, Rebecca Zöllner, Dilara Yüksel, Markus M. Nöthen, Andreas J. Forstner, Marcella Rietschel, Udo Dannlowski, Bernhard T. Baune, Robert Maier, Stephanie H. Witt, Tilo Kircher |
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| 245 | 1 | 0 | |a Polygenic risk for schizophrenia affects working memory and its neural correlates in healthy subjects |c Axel Krug, Bruno Dietsche, Rebecca Zöllner, Dilara Yüksel, Markus M. Nöthen, Andreas J. Forstner, Marcella Rietschel, Udo Dannlowski, Bernhard T. Baune, Robert Maier, Stephanie H. Witt, Tilo Kircher |
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| 520 | |a Schizophrenia is a disorder with a high heritability. Patients as well as their first degree relatives display lower levels of performance in a number of cognitive domains compared to subjects without genetic risk. Several studies could link these aberrations to single genetic variants, however, only recently, polygenic risk scores as proxies for genetic risk have been associated with cognitive domains and their neural correlates. In the present study, a sample of healthy subjects (n=137) performed a letter version of the n-back task while scanned with 3-T fMRI. All subjects were genotyped with the PsychChip and polygenic risk scores were calculated based on the PGC2 schizophrenia GWAS results. Polygenic risk for schizophrenia was associated with a lower degree of brain activation in prefrontal areas during the 3-back compared to the 0-back baseline condition. Furthermore, polygenic risk was associated with lower levels of brain activation in the right inferior frontal gyrus during the 3-back compared to a 2-back condition. Polygenic risk leads to a shift in the underlying activation pattern to the left side, thus resembling results reported in patients with schizophrenia. The data may point to polygenic risk for schizophrenia being associated with brain function in a cognitive task known to be impaired in patients and their relatives. | ||
| 650 | 4 | |a Neural correlates | |
| 650 | 4 | |a Polygenic risk for schizophrenia | |
| 650 | 4 | |a Prefrontal cortex | |
| 650 | 4 | |a Working memory | |
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