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Type: Journal article
Title: Possible associations of NTRK2 polymorphisms with antidepressant treatment outcome: findings from an extended tag SNP approach
Author: Hennings, J.
Kohli, M.
Czamara, D.
Geise, M.
Eckert, A.
Wolf, C.
Heck, A.
Domschke, K.
Arolt, V.
Baune, B.
Horstmann, S.
Bruckl, T.
Klengel, T.
Menke, A.
Muller-Myhsok, B.
Ising, M.
Uhr, M.
Lucae, S.
Citation: PLoS One, 2013; 8(6):1-12
Publisher: Public Library of Science
Issue Date: 2013
ISSN: 1932-6203
Statement of
Johannes M. Hennings, Martin A. Kohli, Darina Czamara, Maria Giese, Anne Eckert, Christiane Wolf, Angela Heck, Katharina Domschke, Volker Arolt, Bernhard T. Baune, Sonja Horstmann, Tanja Brückl, Torsten Klengel, Andreas Menke, Bertram Müller-Myhsok, Marcus Ising, Manfred Uhr, Susanne Lucae
Abstract: BACKGROUND Data from clinical studies and results from animal models suggest an involvement of the neurotrophin system in the pathology of depression and antidepressant treatment response. Genetic variations within the genes coding for the brain-derived neurotrophic factor (BDNF) and its key receptor Trkb (NTRK2) may therefore influence the response to antidepressant treatment. METHODS We performed a single and multi-marker association study with antidepressant treatment outcome in 398 depressed Caucasian inpatients participating in the Munich Antidepressant Response Signature (MARS) project. Two Caucasian replication samples (N = 249 and N = 247) were investigated, resulting in a total number of 894 patients. 18 tagging SNPs in the BDNF gene region and 64 tagging SNPs in the NTRK2 gene region were genotyped in the discovery sample; 16 nominally associated SNPs were tested in two replication samples. RESULTS In the discovery analysis, 7 BDNF SNPs and 9 NTRK2 SNPs were nominally associated with treatment response. Three NTRK2 SNPs (rs10868223, rs1659412 and rs11140778) also showed associations in at least one replication sample and in the combined sample with the same direction of effects (P(corr) = .018, P(corr) = .015 and P(corr) = .004, respectively). We observed an across-gene BDNF-NTRK2 SNP interaction for rs4923468 and rs1387926. No robust interaction of associated SNPs was found in an analysis of BDNF serum protein levels as a predictor for treatment outcome in a subset of 93 patients. CONCLUSIONS/LIMITATIONS Although not all associations in the discovery analysis could be unambiguously replicated, the findings of the present study identified single nucleotide variations in the BDNF and NTRK2 genes that might be involved in antidepressant treatment outcome and that have not been previously reported in this context. These new variants need further validation in future association studies.
Keywords: Humans; Receptor, trkB; Brain-Derived Neurotrophic Factor; Antidepressive Agents; Treatment Outcome; Reproducibility of Results; Computational Biology; Sex Characteristics; Haplotypes; Polymorphism, Single Nucleotide; Middle Aged; Female; Male
Rights: © 2013 Hennings et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
RMID: 0020128845
DOI: 10.1371/journal.pone.0064947
Appears in Collections:Psychiatry publications

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