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Individuals who have experienced high levels of childhood stress are at increased risk for a wide range of behavioral problems that persist into adulthood, yet the neurobiological and molecular mechanisms underlying these associations remain poorly understood. Many of the difficulties observed in stress-exposed children involve problems with learning and inhibitory control. This experiment was designed to test individuals' ability to learn to inhibit responding during a laboratory task. To do so, we measured stress exposure among a community sample of school-aged children, and then followed these children for a decade. Those from the highest and lowest quintiles of childhood stress exposure were invited to return to our laboratory as young adults. At that time, we reassessed their life stress exposure, acquired functional magnetic resonance imaging data during an inhibitory control task, and assayed these individuals' levels of methylation in the FK506 binding protein 5 (FKBP5) gene. We found that individuals who experienced high levels of stress in childhood showed less differentiation in the dorsolateral prefrontal cortex between error and correct trials during inhibition. This effect was associated only with childhood stress exposure and not by current levels of stress in adulthood. In addition, FKBP5 methylation mediated the association between early life stress and inhibition-related prefrontal activity. These findings are discussed in terms of using multiple levels of analyses to understand the ways in which adversity in early development may affect adult behavioral adaptation.

development and psychopathology

Early life stress, FK506 binding protein 5 gene (<i>FKBP5</i>) methylation, and inhibition-related prefrontal function: A prospective longitudinal study

Early life stress, FK506 binding protein 5 gene (FKBP5) methylation, and inhibition-related prefrontal function: A prospective longitudinal study