Clin Psychopharmacol Neurosci.  2021 Aug;19(3):449-458. 10.9758/cpn.2021.19.3.449.

White Matter Alterations Associated with Pro-inflammatory Cytokines in Patients with Major Depressive Disorder

Affiliations
  • 1Department of Psychiatry, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
  • 2Department of Clinical Pharmacology and Therapeutics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.

Abstract


Objective
Regarding the neuroinflammatory theory of major depressive disorder (MDD), little is known about the effect of pro-inflammatory cytokines on white matter (WM) changes in MDD. We aimed to investigate the relationship between pro-inflammatory cytokines and WM alterations in patients with MDD.
Methods
Twenty-two patients with MDD and 22 healthy controls (HC) were evaluated for brain imaging and pro-inflammatory cytokines including interleukin (IL)-1β, IL-6, IL-8, interferon-γ and tumor necrosis factor (TNF)-α. Tract-based spatial statistics and FreeSurfer were used for brain image analysis.
Results
The levels of TNF-αand IL-8 were significantly higher in the MDD group than in HC. Compared to HC, lower fractional anisotropy (FA), and higher median diffusivity (MD) and radial diffusivity (RD) values were found in the MDD group for several WM regions. Voxel-wise correlation analysis showed that the level of TNF-α was negatively correlated with FA, and positively correlated with MD and RD in the left body and genu of the corpus callosum, left anterior corona radiata, and left superior corona radiata.
Conclusion
Our findings suggest that TNF-α may play an important role in the WM alterations in depression, possibly through demyelination.

Keyword

Depressive disorder; major; Cytokines; Tumor necrosis factor-alpha; White matter; Neuroimaging; Corpus callosum
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