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      Neural mechanisms of a genome-wide supported psychosis variant.

      Science (New York, N.Y.)

      Adult, Affective Symptoms, genetics, physiopathology, Bipolar Disorder, Brain Mapping, Female, Genetic Predisposition to Disease, Genome-Wide Association Study, Genotype, Hippocampus, physiology, Humans, Kruppel-Like Transcription Factors, Magnetic Resonance Imaging, Male, Mental Processes, Phenotype, Polymorphism, Single Nucleotide, Prefrontal Cortex, Schizophrenia

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          Abstract

          Schizophrenia is a devastating, highly heritable brain disorder of unknown etiology. Recently, the first common genetic variant associated on a genome-wide level with schizophrenia and possibly bipolar disorder was discovered in ZNF804A (rs1344706). We show, by using an imaging genetics approach, that healthy carriers of rs1344706 risk genotypes exhibit no changes in regional activity but pronounced gene dosage-dependent alterations in functional coupling (correlated activity) of dorsolateral prefrontal cortex (DLPFC) across hemispheres and with hippocampus, mirroring findings in patients, and abnormal coupling of amygdala. Our findings establish disturbed connectivity as a neurogenetic risk mechanism for psychosis supported by genome-wide association, show that rs1344706 or variation in linkage disequilibrium is functional in human brain, and validate the intermediate phenotype strategy in psychiatry.

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          Journal
          19407193
          10.1126/science.1167768

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