Serotonin transporter polymorphism (5HTTLPR), severe childhood abuse and depressive symptom trajectories in adulthood
BackgroundCross-sectional studies suggest that the serotonin transporter promoter region polymorphism (5-HTT gene-linked polymorphic region,5HTTLPR) moderates the relationship between childhood abuse and major depressive disorder.AimsTo examine whether the5HTTLPRpolymorphism moderates the effect childhood abuse has on 5-year depressive symptom severity trajectories in adulthood.MethodAt 5-year follow-up, DNA from 333 adult primary care attendees was obtained and genotyped for the5HTTLPRpolymorphism. Linear mixed models were used to test for a genotype × childhood abuse interaction effect on 5-year depressive symptom severity trajectories.ResultsAfter covariate adjustment, homozygoussallele carriers with a history of severe childhood abuse had significantly greater depressive symptom severity at baseline compared with those without a history of severe childhood abuse and this effect persisted throughout the 5-year period of observation.ConclusionsThe5HTTLPR s/sgenotype robustly moderates the effects of severe childhood abuse on depressive symptom severity trajectories in adulthood.