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Genetic Polymorphisms in Monoamine Systems and Outcome of Cognitive Behavior Therapy for Social Anxiety Disorder
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2013 (English)In: PLOS ONE, E-ISSN 1932-6203, Vol. 8, no 11, article id e79015Article in journal (Refereed) Published
Abstract [en]

Objective

The role of genetics for predicting the response to cognitive behavior therapy (CBT) for social anxiety disorder (SAD) has only been studied in one previous investigation. The serotonin transporter (5-HTTLPR), the catechol-o-methyltransferase (COMT) val158met, and the tryptophan hydroxylase-2 (TPH2) G-703Tpolymorphisms are implicated in the regulation of amygdala reactivity and fear extinction and therefore might be of relevance for CBT outcome. The aim of the present study was to investigate if these three gene variants predicted response to CBT in a large sample of SAD patients.

Method

Participants were recruited from two separate randomized controlled CBT trials (trial 1: n = 112, trial 2: n = 202). Genotyping were performed on DNA extracted from blood or saliva samples. Effects were analyzed at follow-up (6 or 12 months after treatment) for both groups and for each group separately at post-treatment. The main outcome measure was the Liebowitz Social Anxiety Scale Self-Report.

Results

At long-term follow-up, there was no effect of any genotype, or gene × gene interactions, on treatment response. In the subsamples, there was time by genotype interaction effects indicating an influence of the TPH2 G-703T-polymorphism on CBT short-term response, however the direction of the effect was not consistent across trials.

Conclusions

None of the three gene variants, 5-HTTLPR, COMTval158met and TPH2 G-703T, was associated with long-term response to CBT for SAD.

Place, publisher, year, edition, pages
2013. Vol. 8, no 11, article id e79015
Keywords [en]
cbt, social anxiety disorder, monoamine systems, genetics, trials
National Category
Psychology Medical Genetics
Research subject
Psychology
Identifiers
URN: urn:nbn:se:su:diva-96608DOI: 10.1371/journal.pone.0079015ISI: 000327258600014OAI: oai:DiVA.org:su-96608DiVA, id: diva2:666991
Note

This study was sponsored by grants from the Swedish Research Council and the Stockholm County CouncilN. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Available from: 2013-11-25 Created: 2013-11-25 Last updated: 2022-03-23Bibliographically approved

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Carlbring, Per

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