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  • Title: Interaction between FKBP5 and childhood trauma and risk of aggressive behavior.
    Author: Bevilacqua L, Carli V, Sarchiapone M, George DK, Goldman D, Roy A, Enoch MA.
    Journal: Arch Gen Psychiatry; 2012 Jan; 69(1):62-70. PubMed ID: 22213790.
    Abstract:
    CONTEXT: Childhood trauma may predispose individuals to aggressive behavior, and both childhood trauma and aggressive behavior are associated with hypothalamic-pituitary-adrenal axis dysregulation. OBJECTIVE: To determine whether there would be an interaction between genetic variation in FKBP5 and childhood trauma in predicting aggressive behavior. DESIGN: Cross-sectional study. Four FKBP5 single-nucleotide polymorphisms used in previous studies (rs3800373, rs9296158, rs1360780, and rs9470080) were genotyped. Three diplotypes were derived from 2 major putatively functional haplotypes regulating protein expression that were previously associated with glucocorticoid receptor sensitivity. SETTING: Penitentiary District of Abruzzo-Molise in central Italy. PARTICIPANTS: A population of 583 male Italian prisoners recruited between 2005 and 2008. MAIN OUTCOME MEASURES: A comprehensive analysis of aggression and impulsivity was undertaken using the Brown-Goodwin Lifetime History of Aggression (BGHA) questionnaire, the Buss-Durkee Hostility Inventory (BDHI), and the Barratt Impulsiveness Scale (BIS). A history of childhood trauma was investigated with the Childhood Trauma Questionnaire. The interaction between the FKBP5 diplotypes and childhood trauma on measures of aggression was analyzed. Analyses were replicated with a second behavioral measure of aggression: violent behavior in jail. Individual single-nucleotide polymorphism analysis was performed. RESULTS: Childhood trauma had a significant effect on BGHA and BDHI scores but not on BIS scores. We observed a significant influence of the FKBP5 high-expression diplotype on both a lifetime history of aggressive behavior (BGHA) (P = .012) and violent behavior in jail (P = .025) but only in individuals exposed to childhood trauma, in particular to physical abuse. No main effect of the FKBP5 diplotypes was observed. CONCLUSION: These data suggest that childhood trauma and variants in the FKBP5 gene may interact to increase the risk of overt aggressive behavior.
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