Genome-wide association uncovers shared genetic effects among personality traits and mood states.
SourceAmerican Journal of Medical Genetics. Part B : Neuropsychiatric Genetics, 159B, 6, (2012), pp. 684-695
1 september 2012
Article / Letter to editor
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Laboratory of Genetic, Endocrine and Metabolic Diseases
Epidemiology, Biostatistics & HTA
American Journal of Medical Genetics. Part B : Neuropsychiatric Genetics
SubjectDCN MP - Plasticity and memory; DCN NN - Brain networks and neuronal communication; DCN PAC - Perception action and control; DCN PAC - Perception action and control IGMD 3: Genomic disorders and inherited multi-system disorders; DCN PAC - Perception action and control NCEBP 9 - Mental health; IGMD 3: Genomic disorders and inherited multi-system disorders DCN MP - Plasticity and memory; NCEBP 1: Molecular epidemiology; NCEBP 1: Molecular epidemiology IGMD 7: Iron metabolism; NCEBP 1: Molecular epidemiology ONCOL 5: Aetiology, screening and detection; NCEBP 9: Mental health
Measures of personality and psychological distress are correlated and exhibit genetic covariance. We conducted univariate genome-wide SNP ( approximately 2.5 million) and gene-based association analyses of these traits and examined the overlap in results across traits, including a prediction analysis of mood states using genetic polygenic scores for personality. Measures of neuroticism, extraversion, and symptoms of anxiety, depression, and general psychological distress were collected in eight European cohorts (n ranged 546-1,338; maximum total n = 6,268) whose mean age ranged from 55 to 79 years. Meta-analysis of the cohort results was performed, with follow-up associations of the top SNPs and genes investigated in independent cohorts (n = 527-6,032). Suggestive association (P = 8 x 10(-8) ) of rs1079196 in the FHIT gene was observed with symptoms of anxiety. Other notable associations (P < 6.09 x 10(-6) ) included SNPs in five genes for neuroticism (LCE3C, POLR3A, LMAN1L, ULK3, SCAMP2), KIAA0802 for extraversion, and NOS1 for general psychological distress. An association between symptoms of depression and rs7582472 (near to MGAT5 and NCKAP5) was replicated in two independent samples, but other replication findings were less consistent. Gene-based tests identified a significant locus on chromosome 15 (spanning five genes) associated with neuroticism which replicated (P < 0.05) in an independent cohort. Support for common genetic effects among personality and mood (particularly neuroticism and depressive symptoms) was found in terms of SNP association overlap and polygenic score prediction. The variance explained by individual SNPs was very small (up to 1%) confirming that there are no moderate/large effects of common SNPs on personality and related traits. (c) 2012 Wiley Periodicals, Inc.
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