COG-PSYCHO : Social Cognition and Psychotic Characteristics: Genetic and Phenomic Approach

Bipolar disorder (BD), schizophrenia and depression can feature cognitive impairment, especially in social cognition (SC). According to previous studies, some genes from the oxytocin and dopamine pathways may be involved SC performance. Our endophenotype approach aimed to demonstrate that SC deficits are more severe in schizophrenia and BD or depression with psychotic symptoms (PBP) and are associated with certain Single Nucleotide Polymorphisms (SNPs) variants. 600 patients with schizophrenia, BD ou depression with and without psychotic symptoms will be recrited. Social Cognition was assessed using 4 paradigms: Reading the Mind in the Eyes Test (RMET), Interpersonal Reactivity Index (IRI), Empathy Quotient (QE), and a modified Delay Discounting task. After DNA extraction from blood or saliva sample, we used PCR amplification and real-time detection to genotype SNPs from Oxytocin pathways. he level of ocytocine will be also mesured.