Effect of the COMT val158met polymorphism on white matter connectivity in patients with major depressive disorder

Jeong Ho Seok, Sunyoung Choi, Hyun Kook Lim, Sang Hyuk Lee, In Seong Kim, Byung Joo Ham

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Cortico-limbic network dysfunction and genetic polymorphism are considered to be associated with major depressive disorder (MDD). Using diffusion tensor imaging (DTI), we investigated the relationship between catechol-O-methyltransferase (COMT) gene polymorphisms and white matter tract integrity in patients with MDD. Eighty-six patients with MDD and 62 healthy controls participated in this study. DTI and genotyping for the COMT val158met gene (rs4680) polymorphism were conducted to determine the impact of COMT polymorphisms on white matter changes in patients with MDD. Voxel-wise statistical analyses of fractional anisotropy (FA) were performed using tract-based spatial statistics (TBSS). FAs of the MDD patient group were significantly decreased in bilateral frontal forceps minor, bilateral anterior cingulum, genu of corpus callosum, left posterior cingulum, right superior longitudinal fasciculus, and right posterior thalamic radiation compared with those of healthy controls. In the MDD patient group, mean FA in subjects with the GG allele was significantly decreased in left inferior longitudinal fasciculus, bilateral middle temporal gyrus, right frontal gyrus, and right cingulum bundle area compared with subjects with the AA/AG allele. These findings suggest cortico-limbic network dysfunction in MDD. Specifically, further FA reduction was evident in MDD patients with the valine homozygote group of the COMT gene. MDD may be associated with dysfunctional white matter changes, and the valine homozygote of COMT gene may contribute to further abnormalities in these pathological changes.

Original languageEnglish
Pages (from-to)35-39
Number of pages5
JournalNeuroscience Letters
Volume545
DOIs
Publication statusPublished - 2013 Jun 17

Keywords

  • COMT
  • Major depressive disorder
  • TBSS
  • White matter connectivity

ASJC Scopus subject areas

  • Neuroscience(all)

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