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Published in: BMC Psychiatry 1/2010

Open Access 01-12-2010 | Research article

The COMTval158met polymorphism is associated with symptom relief during exposure-based cognitive-behavioral treatment in panic disorder

Authors: Tina B Lonsdorf, Christian Rück, Jan Bergström, Gerhard Andersson, Arne Öhman, Nils Lindefors, Martin Schalling

Published in: BMC Psychiatry | Issue 1/2010

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Abstract

Background

Cognitive behavioral therapy (CBT) represents a learning process leading to symptom relief and resulting in long-term changes in behavior. CBT for panic disorder is based on exposure and exposure-based processes can be studied in the laboratory as extinction of experimentally acquired fear responses. We have recently demonstrated that the ability to extinguish learned fear responses is associated with a functional genetic polymorphism (COMTval158met) in the COMT gene and this study was aimed at transferring the experimental results on the COMTval158met polymorphism on extinction into a clinical setting.

Methods

We tested a possible effect of the COMTval158met polymorphism on the efficacy of CBT, in particular exposure-based treatment modules, in a sample of 69 panic disorder patients.

Results

We present evidence that panic patients with the COMTval158met met/met genotype may profit less from (exposure-based) CBT treatment methods as compared to patients carrying at least one val-allele. No association was found with the 5-HTTLPR/rs25531 genotypes which is presented as additional material.

Conclusions

We were thus able to transfer findings on the effect of the COMTval158met polymorphism from an experimental extinction study obtained using healthy subjects to a clinical setting. Furthermore patients carrying a COMT val-allele tend to report more anxiety and more depression symptoms as compared to those with the met/met genotype. Limitations of the study as well as possible clinical implications are discussed.

Trial registration

Clinical Trial Registry name: Internet-Versus Group-Administered Cognitive Behavior Therapy for Panic Disorder (IP2). Registration Identification number: NCT00845260, http://​www.​clinicaltrials.​gov/​ct2/​show/​NCT00845260
Appendix
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Metadata
Title
The COMTval158met polymorphism is associated with symptom relief during exposure-based cognitive-behavioral treatment in panic disorder
Authors
Tina B Lonsdorf
Christian Rück
Jan Bergström
Gerhard Andersson
Arne Öhman
Nils Lindefors
Martin Schalling
Publication date
01-12-2010
Publisher
BioMed Central
Published in
BMC Psychiatry / Issue 1/2010
Electronic ISSN: 1471-244X
DOI
https://doi.org/10.1186/1471-244X-10-99

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