Dataset Information

Childhood Sexual Abuse and Impulsive Personality Traits: Mixed Evidence for Moderation by DRD4 Genotype.

ABSTRACT: This project examines associations between childhood sexual abuse (CSA) and two dimensions of impulsivity (sensation seeking and premeditation), and tests whether CSA-personality associations are moderated by the DRD4 exon III VNTR polymorphism. Sample 1 is from a longitudinal study of university students measured at 10 waves over ages 18-24 years (n = 500). Sample 2 is from a national sample of young adult sibling pairs, ages 18-24, from the National Longitudinal Study of Adolescent Health (n = 2,559). In both samples, CSA was associated with elevated sensation seeking. In Sample 1, the association between CSA and sensation seeking was moderated by DRD4 genotype; this gene × environment interaction effect, however, was not replicated in Sample 2. Results suggest new avenues for research on CSA in the area of normal-range personality variation.

SUBMITTER: Harden KP

PROVIDER: S-EPMC4309978 | biostudies-literature | 2015 Apr

REPOSITORIES: biostudies-literature

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Publications

Childhood Sexual Abuse and Impulsive Personality Traits: Mixed Evidence for Moderation by DRD4 Genotype.

Harden K Paige KP Carlson Marie D MD Kretsch Natalie N Corbin William R WR Fromme Kim K

Journal of research in personality 20150401

This project examines associations between childhood sexual abuse (CSA) and two dimensions of impulsivity (sensation seeking and premeditation), and tests whether CSA-personality associations are moderated by the DRD4 exon III VNTR polymorphism. Sample 1 is from a longitudinal study of university students measured at 10 waves over ages 18-24 years (n = 500). Sample 2 is from a national sample of young adult sibling pairs, ages 18-24, from the National Longitudinal Study of Adolesce ...[more]

PMID: 25642000

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Project description:The endocannabinoid system has been implicated in stress adaptation and the regulation of mood in rodent studies, but few human association studies have examined these links and replications are limited.To examine whether a synonymous polymorphism, rs1049353, in exon 4 of the gene encoding the human endocannabinoid receptor (CNR1) moderates the effect of self-reported childhood physical abuse on lifetime anhedonia and depression and to replicate this interaction in an independent sample.Genetic association study in 1041 young US women with replication in an independent Australian sample of 1428 heroin-dependent individuals as cases and 506 participants as neighborhood controls.Self-reported anhedonia and depression (with anhedonia).In both samples, individuals who experienced childhood physical abuse were considerably more likely to report lifetime anhedonia. However, in those with 1 or more copies of the minor allele of rs1049353, this pathogenic effect of childhood physical abuse was attenuated. Thus, in participants reporting childhood physical abuse, although 57.1% of those homozygous for the major allele reported anhedonia, only 28.6% of those who were carriers of the minor allele reported it (P=.01). The rs1049353 polymorphism also buffered the effects of childhood physical abuse on major depressive disorder; however, this influence was largely attributable to anhedonic depression. These effects were also noted in an independent sample, in which minor allele carriers were at decreased risk for anhedonia even when exposed to physical abuse.Consistent with preclinical findings, a synonymous CNR1 polymorphism, rs1049353, is linked to the effects of stress attributable to childhood physical abuse on anhedonia and anhedonic depression. This polymorphism reportedly resides in the neighborhood of an exon splice enhancer; hence, future studies should carefully examine its effect on expression and conformational variation in CNR1, particularly in relation to stress adaptation.

Dataset Information

Childhood Sexual Abuse and Impulsive Personality Traits: Mixed Evidence for Moderation by DRD4 Genotype.

Publications

Childhood Sexual Abuse and Impulsive Personality Traits: Mixed Evidence for Moderation by <i>DRD4</i> Genotype.

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