Psychopathological consequences of maltreatment among children and adolescents: A systematic review of the GxE literature

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Highlights

  • Child maltreatment is a significant risk factor for developmental psychopathology.

  • Various genes interact with maltreatment in determining dysfunctional outcomes.

  • Multiple genotypes interact with environment in case of maltreatment (GxGxE).

  • A multi-genic approach and a better specification of maltreatment are warranted.

Abstract

Background

In the last years, several studies focused on the role of Gene-Environment interactions (GxE) in influencing psychopathological outcomes among maltreated children and adolescents. These studies analysed the effect of different genetic variations.

Aims

The aim of the present review is to provide an overview of studies investigating GxE effects among maltreated children and adolescents.

Methods and Procedures

A systematic literature review was performed by using the following keywords: “Child maltreatment” and “GxE”, “Child maltreatment” and “Psychopathology”, “Gene-Environment interaction”, “Gene-environment correlation”, “GxE and psychopathology”, “Childhood trauma” and “Psychiatric symptoms”, “Early adverse life events”, “Early life stress”, “Antisocial behaviour”, “Depression”, “Internalizing symptoms”, through the following electronic databases: PubMed, Scopus and PsycINFO, from 2006 to 2017, finding a total of 31 papers.

Outcomes and Results

The present review confirm that maltreatment produces worse psychopathological outcomes (antisocial behaviour, depression, and other psychiatric traits) in subjects with a specific genetic vulnerability.

Conclusions and Implications

Comprehending the pathways from child maltreatment to psychopathology in their full complexity will be essential to build efficacious preventive and therapeutic protocols.

Section snippets

What this paper adds?

In the presence of a history of maltreatment, the following genetic risk factors emerge. For antisocial conduct: MAOA low activity allele (among boys) or high activity allele (among girls), 5-HTTLPR S allele, one or two copies of CATT haplotype/A allele of rs4713916 polymorphism (FKBP5) and TPH1 T allele. For depression: 5-HTTLPR S allele (especially in the homozygous asset), DAT1 T allele, Met allele and Val/Val genotype of BDNF-Val66met (rs6265), the methylation process of BDNF, NR3C1 and

Method

Studies were identified through an extensive search in the following electronic databases: Medline and PsycINFO in the period 2006 to 2017. The selection of relevant published studies began with a search that combined the following keywords: “Child maltreatment” and “GxE”, “Child maltreatment” and “Psychopathology”, “Gene-Environment interaction”, “Gene-environment correlation”, “GxE and psychopathology”, “Childhood trauma” and “Psychiatric symptoms”, “Early adverse life events”, “Early life

Antisocial behaviour

Maltreating family environments have been shown to be a risk factor for the development of antisocial conduct (Cicchetti & Rogosch, 2001). Among maltreated subjects, this outcome is often studied in relation to monoamine oxidase A (MAOA) polymorphisms, being its short allele variant (low transcriptional activity) associated with aggressive behaviour (Buckholtz & Meyer-Lindenberg, 2008).

Building on Caspi et al. (2005) results among youths/adults, Kim-Cohen et al. (2006) examined the interaction

Interaction between childhood maltreatment and genetic risk factors

The present paper reviewed the interaction between childhood maltreatment and specific genetic polymorphisms in determining psychopathological manifestations among children and adolescents. We hypothesized that a history of childhood victimization can have a bigger impact on development and mental health in the presence of specific genetic vulnerability. In particular, we focused on the interaction between maltreatment and genetic variations of MAOA, 5-HTTLPR, CRHR1, FKBP5 and BDNF (more

Conclusion

In conclusion, we argue that maltreatment is very likely to result in worse psychopathological outcomes among subjects with a specific genetic vulnerability. Albeit maltreatment (especially at high levels of severity; Cicchetti et al., 2010; Weder et al., 2009) is associated with increased level of psychopathological symptoms regardless of the genetic asset, specific genotypes seem to strongly increase the risk of negative outcomes.

Comprehending pathways from child maltreatment to

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