Improvement in indices of cellular protection after psychological treatment for social anxiety disorder

Research output: Contribution to journalArticle

Abstract

Telomere attrition is a hallmark of cellular aging and shorter telomeres have been reported in mood and anxiety disorders. Telomere shortening is counteracted by the enzyme telomerase and cellular protection is also provided by the antioxidant enzyme glutathione peroxidase (GPx). Here, telomerase, GPx, and telomeres were investigated in 46 social anxiety disorder (SAD) patients in a within-subject design with repeated measures before and after cognitive behavioral therapy. Treatment outcome was assessed by the Liebowitz Social Anxiety Scale (self-report), administered three times before treatment to control for time and regression artifacts, and posttreatment. Venipunctures were performed twice before treatment, separated by 9 weeks, and once posttreatment. Telomerase activity and telomere length were measured in peripheral blood mononuclear cells and GPx activity in plasma. All patients contributed with complete data. Results showed that social anxiety symptom severity was significantly reduced from pretreatment to posttreatment (Cohen’s d = 1.46). There were no significant alterations in telomeres or cellular protection markers before treatment onset. Telomere length and telomerase activity did not change significantly after treatment, but an increase in telomerase over treatment was associated with reduced social anxiety. Also, lower pretreatment telomerase activity predicted subsequent symptom improvement. GPx activity increased significantly during treatment, and increases were significantly associated with symptom improvement. The relationships between symptom improvement and putative protective enzymes remained significant also after controlling for body mass index, sex, duration of SAD, smoking, concurrent psychotropic medication, and the proportion of lymphocytes to monocytes. Thus, indices of cellular protection may be involved in the therapeutic mechanisms of psychological treatment for anxiety.

Details

Authors
  • Kristoffer N.T. Månsson
  • Daniel Lindqvist
  • Liu L. Yang
  • Cecilia Svanborg
  • Josef Isung
  • Gustav Nilsonne
  • Lise Bergman-Nordgren
  • Samir El Alaoui
  • Erik Hedman-Lagerlöf
  • Martin Kraepelien
  • Jens Högström
  • Gerhard Andersson
  • Carl Johan Boraxbekk
  • Håkan Fischer
  • Catharina Lavebratt
  • Owen M. Wolkowitz
  • Tomas Furmark
Organisations
External organisations
  • Karolinska Institutet
  • Stockholm University
  • Uppsala University
  • Karolinska University Hospital
  • Linköping University
  • Umeå University
  • Copenhagen University Hospital
  • University of California, San Francisco
  • Stockholms läns sjukvårdsområde
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Psychiatry
Original languageEnglish
Article number340
JournalTranslational Psychiatry
Volume9
Issue number1
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes