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oxytocinergic_trauma
Journal article

The oxytocinergic system in functional neurological disorder: Preliminary testing of associations with interoception and childhood trauma

DOKPE

  • 2026
Published in:
  • Comprehensive Psychoneuroendocrinology. - Elsevier BV. - 2026, vol. 27, p. 100376
OXTR
Salivary oxytocin
Methylation
Interoception
Childhood trauma
English The oxytocinergic system has been proposed as a vulnerability factor in the pathophysiology of Functional Neurological Disorder (FND), a condition associated with stressful life-events and disturbed bodily awareness. Recent work from our group demonstrated reduced interoceptive function alongside elevated salivary oxytocin (OXT) levels in patients with mixed-FND. Here, we tested the same patients with FND (N = 41) and matched healthy controls (N = 48) of that study, addressing two additional aims: (I) exploratively testing the genetic associations of the oxytocin receptor gene (OXTR) (i.e. investigating both genetic and epigenetic variables between groups and in interaction with interoceptive measures), and (II) evaluating whether integrating (epi)genetic and OXT measures improves overall model fit to explain interoceptive dysfunction and self-reported childhood trauma scores. No group difference was observed regarding the allelic distribution of the rs53576 SNP or in OXTR methylation levels. For salivary OXT, an interaction effect between OXTR genotype and intron methylation (p = 0.036), as well as an interaction between group and genotype (p = 0.026) was identified. With respect to aim II, including oxytocinergic variables in the model did not explain additional interoceptive variance. However, including OXTR promoter methylation rates and salivary OXT levels alongside the group variable appeared to improve model fit and to account for more variance in self-reported childhood trauma. While our preliminary genetic findings need to be interpreted with caution due to limited sample size and exploratory analyses, we suggest future research to profit from the inclusion of oxytocinergic markers when investigating risk-factors associated with FND.
Faculty
Faculté des sciences et de médecine
Department
Section de médecine
Language
  • English
Classification
Pathology, clinical medicine
Other electronic version

Version en ligne

License
CC BY
Open access status
gold
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/336573
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