Moderation of antidepressant response by the serotonin transporter gene

Patricia Huezo-Diaz, Rudolf Uher, Rebecca Smith, Marcella Rietschel, Neven Henigsberg, Andrej Marusic, Ole Mors, Wolfgang Maier, Joanna Hauser, Daniel Souery, Anna Placentino, Astrid Zobel, Erik Roj Larsen, Piotr M. Czerski, Bhanu Gupta, Farzana Hoda, Nader Perroud, Anne Farmer, Ian Craig, Katherine J. AitchisonPeter McGuffin

Research output: Contribution to journalArticlepeer-review

146 Citations (Scopus)

Abstract

Background There have been conflicting reports on whether the length polymorphism in the promoter of the serotonin transporter gene (5-HTTLPR) moderates the antidepressant effects of selective serotonin reuptake inhibitors (SSRIs). We hypothesised that the pharmacogenetic effect of 5-HTTLPR is modulated by gender, age and other variants in the serotonin transporter gene. Aims To test the hypothesis that the 5-HTTLPR differently influences response to escitalopram (an SSRI) compared with nortriptyline (a noradrenaline reuptake inhibitor). Method The 5-HTTLPR and 13 additional markers across the serotonin transporter gene were genotyped in 795 adults with mode rate-to-severe depression treated with escitalopram or nortriptyline in the Genome Based Therapeutic Drugs for Depression (GENDEP) project. Results The 5-HTTLPR moderated the response to escitalopram, with long-allele carriers improving more than short-allele homozygotes. A significant three-way interaction between 5-HTTLPR, drug and gender indicated that the effect was concentrated in males treated with escitalopram. The single-nucleotide polymorphism rs2020933 also influenced outcome. Conclusions The effect of 5-HTTLPR on antidepressant response is SSRI specific conditional on gender and modulated by another polymorphism at the 5' end of the serotonin transporter gene.
Original languageEnglish
Pages (from-to)30 - 38
Number of pages9
JournalBritish Journal of Psychiatry
Volume195
Issue number1
DOIs
Publication statusPublished - Jul 2009

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