Abstract
Schizophrenia and bipolar disorder share genetic risk, brain vulnerability, and clinical symptoms. The ZNF804A risk variant, rs1344706, confers susceptibility for both disorders. This study aimed to identify neural mechanisms common to both schizophrenia and bipolar disorder through this variant's potential effects on cortical thickness, white matter tract integrity, and cognitive function. Imaging, genetics, and cognitive measures were ascertained in 62 healthy adults aged between 18 and 59 years. High-resolution multimodal MRI/DTI imaging was used to measure cortical thickness and major frontotemporal and interhemispheric white matter tracts. The general linear model was used to examine the influence of the ZNF804A rs1344706 risk variant on cortical thickness, white matter tract integrity, and cognitive measures. Individuals homozygous for the risk variant (‘A’ allele) demonstrated reduced cortical gray matter thickness in the superior temporal gyrus, and in the anterior and posterior cingulate cortices compared with C-allele carriers. No effect of the risk variant on microstructural integrity of white matter tracts was found. Reduced attention control was found in risk allele homozygotes, aligning with findings in the anterior cingulate cortex. Our data provide a novel, genetically based neural risk mechanism for the major psychoses by effects of the ZNF804A risk variant on neural structures and cognitive function susceptible in both disorders. Our findings link genetic, imaging, and cognitive susceptibility relevant to both schizophrenia and bipolar disorder.
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Acknowledgements
This work was supported by the Canadian Institutes of Health Research Clinician Scientist Award (ANV), APA/APIRE Astra-Zeneca Young Minds in Psychiatry Award (ANV), and the Centre for Addiction and Mental Health (AT). Dr Aristotle N Voineskos had full access to all the data in the study and takes responsibility for the integrity of the data and accuracy of the data analysis.
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Dr Bruce G Pollock receives research support from the National Institute of Health and the Canadian Institutes of Health Research. Within the past 5 years, he has been a member of the advisory board of Lundbeck Canada (final meeting was in May 2009) and Forest Laboratories (final meeting was in March 2008). Dr Pollock has served one time as a consultant for Wyeth (October 2008) and Takeda (July 2007). He was also a faculty member of the Lundbeck International Neuroscience Foundation (LINF) (final meeting was in April 2010). Dr Benoit H Mulsant currently receives research support from the US National Institute of Mental Health, the Canadian Institutes for Health Research, Bristol-Myers Squibb, and Wyeth. During the past five years, he has also received research support or honoraria from Astra-Zeneca, Eli Lilly, Forest Laboratories, GlaxoSmithKline, Janssen, Lundbeck, and Pfizer. Dr James L Kennedy received speaker fees from Eli Lilly in 2010. All other authors declare no conflict of interest.
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Voineskos, A., Lerch, J., Felsky, D. et al. The ZNF804A Gene: Characterization of a Novel Neural Risk Mechanism for the Major Psychoses. Neuropsychopharmacol 36, 1871–1878 (2011). https://doi.org/10.1038/npp.2011.72
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DOI: https://doi.org/10.1038/npp.2011.72
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