Suppression mediates the effect of 5-HTTLPR by stress interaction on depression

Gennady G. Knyazev, Daria V. Bazovkina, Alexander N. Savostyanov, Vladimir S. Naumenko, Valeriya B. Kuznetsova, Ekaterina A. Proshina

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A number of studies have shown that the presence of short (S), as opposed to long (L), allele of the serotonin transporter-linked polymorphic region (5-HTTLPR) is associated with a higher risk for depression following exposure to stressful life events. However, many other studies failed to confirm this association. One reason for this inconsistency might be the fact that the interaction of the 5-HTTLPR polymorphism with stress may relate not to depression per se, but rather to adaptive or maladaptive emotion regulation strategies. Here we show that individuals homozygous for the long allele respond to stressful events by reappraising their emotional meaning, which may hamper the harmful effect of stress on mental health. In S genotype carriers, on the other hand, stress triggers the appearance of intrusive thoughts and vain attempts to suppress them, which in this group acts as a mediator between stress and depressive symptoms. These findings are in line with neuroimaging studies showing that 5-HTTLPR polymorphism has an effect on the connectivity among key areas involved in emotion regulation.

Original languageEnglish
Pages (from-to)373-378
Number of pages6
JournalScandinavian Journal of Psychology
Volume58
Issue number5
DOIs
Publication statusPublished - 1 Oct 2017

Keywords

  • 5-HTTLPR
  • depression
  • emotion regulation
  • reappraisal
  • rumination
  • stress
  • suppression
  • Stress, Psychological/complications
  • Humans
  • Genotype
  • Male
  • Depression/complications
  • Emotions
  • Polymorphism, Genetic
  • Homozygote
  • Serotonin Plasma Membrane Transport Proteins/genetics
  • Alleles
  • Adult
  • Female

OECD FOS+WOS

  • 5.01.MY PSYCHOLOGY, DEVELOPMENTAL
  • 5.01 PSYCHOLOGY

State classification of scientific and technological information

  • 15 PSYCHOLOGY

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