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Brain-derived neurotrophic factor (BDNF) gene: no major impact on antidepressant treatment response

  • Katharina Domschke (a1), Bruce Lawford (a2) (a3), Gonzalo Laje (a4), Klaus Berger (a5), Ross Young (a3), Phillip Morris (a3), Jürgen Deckert (a6), Volker Arolt (a1), Francis J. McMahon (a4) and Bernhard T. Baune (a7)
  • DOI: http://dx.doi.org/10.1017/S1461145709000030
  • Published online: 23 February 2009
Abstract
Abstract

The brain-derived neurotrophic factor (BDNF) has been suggested to play a pivotal role in the aetiology of affective disorders. In order to further clarify the impact of BDNF gene variation on major depression as well as antidepressant treatment response, association of three BDNF polymorphisms [rs7103411, Val66Met (rs6265) and rs7124442] with major depression and antidepressant treatment response was investigated in an overall sample of 268 German patients with major depression and 424 healthy controls. False discovery rate (FDR) was applied to control for multiple testing. Additionally, ten markers in BDNF were tested for association with citalopram outcome in the STAR*D sample. While BDNF was not associated with major depression as a categorical diagnosis, the BDNF rs7124442 TT genotype was significantly related to worse treatment outcome over 6 wk in major depression (p=0.01) particularly in anxious depression (p=0.003) in the German sample. However, BDNF rs7103411 and rs6265 similarly predicted worse treatment response over 6 wk in clinical subtypes of depression such as melancholic depression only (rs7103411: TT<CC, p=0.003; rs6265: GG<AA, p=0.001). All SNPs had main effects on antidepressant treatment response in ANOVA models when the remaining SNPs were considered as covariates. The STAR*D analyses did not yield significant results at any of the ten BDNF markers. Our results do not support an association between genetic variation in BDNF and antidepressant treatment response or remission. Post-hoc analyses provide some preliminary support for a potential minor role of genetic variation in BDNF and antidepressant treatment outcome in the context of melancholic depression.

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Corresponding author
Address for correspondence: Professor B. T. Baune, Ph.D., M.D., M.P.H., Department of Psychiatry and Psychiatric Neuroscience, School of Medicine and Dentistry, James Cook University, Queensland4811, Australia. Tel.: 0061 7 4781 6731Fax: 0061 7 4781 6841Email: bernhard.baune@jcu.edu.au
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The International Journal of Neuropsychopharmacology
  • ISSN: 1461-1457
  • EISSN: 1469-5111
  • URL: /core/journals/the-international-journal-of-neuropsychopharmacology
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