Psychoneuroendocrinology
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Psychoneuroendocrinology · Jul 2016
FKBP5 polymorphisms, childhood abuse, and PTSD symptoms: Results from the National Health and Resilience in Veterans Study.
Polymorphisms in the FK506 Binding Protein 5 (FKBP5) gene may interact with childhood abuse to increase risk of developing posttraumatic stress disorder (PTSD) symptoms. The objective of this study was to examine the relationship of four previously identified FKBP5 putative risk SNPs (rs9296158, rs3800373, rs1360780, rs947008), childhood abuse, and lifetime PTSD symptoms, including contemporary phenotypic models of PTSD symptoms, in two nationally representative samples of European-American (EA) U. S. military veterans. ⋯ In both samples, all four FKBP5 SNPs predicted hyperarousal/alterations in arousal and reactivity (p values ranged from<0.001 to 0.002). Results of this study suggest that FKBP5 polymorphisms, directly and interactively with childhood abuse, predict severity of lifetime PTSD symptoms, most notably hyperarousal symptoms, in two nationally representative samples of EA veterans. They further indicate that FKBP5 polymorphisms and childhood abuse may contribute to vulnerability for PTSD symptoms and may be most strongly associated with trauma-related hyperarousal symptoms that comprise this phenotype.