Childhood maltreatment and DNA methylation: A systematic review

Publication date: Available online 17 February 2020Source: Neuroscience &Biobehavioral ReviewsAuthor(s): Charlotte A.M. Cecil, Yuning Zhang, Tobias NolteAbstractDNA methylation (DNAm) – an epigenetic process that regulates gene expression – may represent a mechanism for the biological embedding of early traumatic experiences, including childhood maltreatment. Here, we conducted the first systematic review of human studies linking childhood maltreatment to DNAm. In total, 72 studies were included in the review (2008-2018). The majority of extant studies (i) were based on retrospective data in adults, (ii) employed a candidate gene approach (iii) focused on global maltreatment, (iv) were based on easily accessible peripheral tissues, typically blood; and (v) were cross-sectional. Two-thirds of studies (n = 48) also examined maltreatment-related outcomes, such as stress reactivity and psychiatric symptoms. While findings generally support an association between childhood maltreatment and altered patterns of DNAm, factors such as the lack of longitudinal data, low comparability across studies as well as potential genetic and ‘pre-exposure’ environmental confounding currently limit the conclusions that can be drawn. Key challenges are discussed concrete recommendations for future research are provided to move the field forward.
Source: Neuroscience and Biobehavioral Reviews - Category: Neuroscience Source Type: research

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