Case-control and within-family tests for association between 5HTTLPR and conduct problems in a longitudinal adolescent sample

Psychiatr Genet. 2007 Aug;17(4):207-14. doi: 10.1097/YPG.0b013e32809913c8.

Abstract

Background: Several recent studies have reported an association between the serotonin transporter 5HTTLPR (s-allele) and aggression; however, non-replications have also been reported. Inconsistencies may be explained by gene-environment interactions. Using a large general population sample, we sought to test for an association between 5HTTLPR and conduct problems, and to explore for a possible 5HTTLPR by maltreatment interaction.

Methods: Using Caucasian adolescents from the genetic-pairs sample of the National Longitudinal Study of Adolescent Health (n=1,736), we tested for an association between 5HTTLPR and both a categorical and, separately, a continuous measure of conduct problems using regression analyses while controlling for sex, family effects, and age. We then tested for an association between 5HTTLPR and conduct problems using the within-family test Quantitative Transmission Disequilibrium Test. Analyses were repeated for a measure of adolescence-limited delinquency.

Results: Results did not support an association between 5HTTLPR and conduct problems or delinquency. The Quantitative Transmission Disequilibrium Test analyses, which account for population stratification, were nonsignificant (F=0.17; P=0.68); introducing maltreatment as a covariate into the model did not affect this association (F=0.17; P=0.68). No association was seen between 5HTTLPR and a measure of adolescence-limited delinquency (F=0.54; P=0.46).

Discussion: Using two methods in a large general population sample we did not find a significant association between 5HTTLPR and conduct problems. A gene by maltreatment interaction was not supported.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adolescent
  • Adolescent Behavior
  • Case-Control Studies
  • Child
  • DNA / genetics
  • DNA / isolation & purification
  • Family
  • Humans
  • Juvenile Delinquency / statistics & numerical data
  • Longitudinal Studies
  • Mental Disorders / genetics*
  • Mouth Mucosa
  • Phenotype
  • Serotonin Plasma Membrane Transport Proteins / genetics*
  • Siblings
  • Transcription, Genetic
  • Twins, Dizygotic
  • Twins, Monozygotic
  • Whites

Substances

  • Serotonin Plasma Membrane Transport Proteins
  • DNA