Article

Behavior Genetics

, Volume 35, Issue 2, pp 115-120

First online:

Family Dysfunction Interacts with Genes in the Causation of Antisocial Symptoms

  • Tanya Maria May ButtonAffiliated withSocial, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s CollegeSocial, Genetic, and Developmental Research Centre, Institute of Psychiatry, King’s College London Email author 
  • , Jane ScourfieldAffiliated withDepartment of psychological Medicine, University of Wales College of Medicine
  • , Neilson MartinAffiliated withSchool of Psychology, Curtin University
  • , Shaun PurcellAffiliated withWhitehead Institute, MIT
  • , Peter McGuffinAffiliated withSocial, Genetic and Developmental Psychiatry Centre, Institute of Psychiatry, King’s College

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Abstract

There is emerging evidence of gene-environment interaction effects on conduct problems, both from adoption studies and from a study using a measured genotype. An association between non-violent family dysfunction and conduct problems has also been reported, although not in the context of gene–environment interaction studies. The aim of this study was to examine the interaction of genes and family dysfunction in contributing to conduct problems in young people. Parents of 278 monozygotic and 378 dizygotic twin pairs, aged 5–18, from the CaStANET birth cohort twin register were questioned about zygosity, conduct problems and family environment. Using structural equation modeling we tested for main and interactive effects of genes and family dysfunction modelled as an environmental “moderator variable”. Both main and gene–environment interaction effects were highly significant. It was concluded that a risk genotype conferring susceptibility to family dysfunction is responsible for most of the variance in antisocial symptoms in childhood and adolescence.

Keywords

Family dysfunction conduct problems genetics gene–environment interaction twins