SLC6A2 and SLC6A4 Variants interact with Venlafaxine Serum Concentrations to Influence Therapy Outcome

F. Proft; J. Kopf; D. Olmes; S. Hempel; B. Schmidt; P. Riederer; J. Deckert; B. Pfuhlmann; A. Reif; S. Unterecker

doi:10.1055/s-0034-1390412

Pharmacopsychiatry, Inhaltsverzeichnis

Pharmacopsychiatry 2014; 47(07): 245-250
DOI: 10.1055/s-0034-1390412

Original Paper

SLC6A2 and SLC6A4 Variants interact with Venlafaxine Serum Concentrations to Influence Therapy Outcome

F. Proft

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

,

J. Kopf

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

²current position: Department of Psychiatry, Psychosomatics and Psychotherapy, Johann Wolfgang Goethe University Frankfurt, Germany

,

D. Olmes

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

³current position: Department of Neurology, Friedrich-Alexander University Erlangen-Nuremberg, Germany

,

S. Hempel

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

,

B. Schmidt

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

,

P. Riederer

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

,

J. Deckert

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

,

B. Pfuhlmann

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

⁴current position: Städtisches Krankenhaus Dresden Neustadt, Klinik für Psychiatrie und Psychotherapie Weißer Hirsch, Dresden, Germany

,

A. Reif^*

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

²current position: Department of Psychiatry, Psychosomatics and Psychotherapy, Johann Wolfgang Goethe University Frankfurt, Germany

,

S. Unterecker^*

¹Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Würzburg, Germany

› Institutsangaben

Abstract

Objective: The effects of genetic variants in genes encoding the target structures of antidepressants on the therapeutic efficacy of antidepressant drugs have been investigated with unconclusive results. One possible confounding factor in most studies was the fact that drug serum concentrations had not been determined.

Methods: Within a clinical setting, 56 inpatients suffering from depressive episodes in the context of either major depressive disorder or bipolar affective disorder were studied. Response to venlafaxine was assessed after 4 weeks of treatment and correlated to serum concentration and functional variants in genes encoding the norepinephrine (SLC6A2; rs28386840) and the serotonin transporter (SLC6A4; [5-HTTLPR], rs25531). Symptom change was evaluated using the Clinical Global Impression-Improvement (CGI-I) scale.

Results: No association between therapeutic response, venlafaxine serum concentration (active moiety) and rs28386840 was found. In carriers of the high expressing SLC6A4 genotype (l_Al_A-), a poor response to venlafaxine was found significantly more often. In subsamples stratified for serum concentration this held true for patients with serum concentrations between 201 and 400 ng/mL (n=21), while in patients with sub- (≤ 200 ng/mL; n=12) and supra-recommended (> 400 ng/mL; n=23) concentrations, no significant differences were observed.

Discussion: The observed association is consistent with findings of some previous studies, whereas others showed differing results highlighting the need for further investigations.

Key words

pharmacogenomics - serotonin transporter - norepinephrine transporter - venlafaxine - serum concentration

Volltext

Referenzen

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