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Journal Article

Citation

Yuan M, Pantazatos SP, Zhu H, Li Y, Miller JM, Rubin-Falcone H, Zanderigo F, Ren Z, Yuan C, Lui S, Gong Q, Qiu C, Zhang W, John Mann J. Eur. Neuropsychopharmacol. 2019; ePub(ePub): ePub.

Affiliation

Molecular Imaging and Neuropathology Division, New York State Psychiatric Institute, New York, NY, United States; Department of Psychiatry, Columbia University, New York, NY, United States; Department of Radiology, Columbia University College of Physicians and Surgeons, New York, NY.

Copyright

(Copyright © 2019, Elsevier Publishing)

DOI

10.1016/j.euroneuro.2019.07.238

PMID

31488341

Abstract

Individuals with both post-traumatic stress disorder and major depressive disorder (PTSD+MDD) often show greater social and occupational impairment and poorer treatment response than individuals with PTSD alone. Increasing evidence reveals that the amygdala, a brain region implicated in the pathophysiology of both of these conditions, is a complex of structurally and functionally heterogeneous nuclei. Quantifying the functional connectivity of two key amygdala subregions, the basolateral (BLA) and centromedial (CMA), in PTSD+MDD and PTSD-alone could advance our understanding of the neurocircuitry of these conditions. 18 patients with PTSD+MDD, 28 with PTSD-alone, and 50 trauma exposed healthy controls (TEHC), all from a cohort who survived the same large earthquake in China, underwent resting-state functional magnetic resonance imaging. Bilateral BLA and CMA functional connectivity (FC) maps were created using a seed-based approach for each participant. The analysis of covariance of FC was used to determine between-group differences. A significant interaction between amygdala subregion and diagnostic group suggested that differences in connectivity patterns between the two seeds were mediated by diagnosis. Post-hoc analyses revealed that PTSD+MDD patients showed weaker connectivity between right BLA and (a) left anterior cingulate cortex/supplementary motor area, and (b) bilateral putamen/pallidum, compared with PTSD-alone patients. Higher CMA connectivities left ACC/SMA were also observed in PTSD+MDD compared with PTSD-alone. An inverse relationship between the connectivity of right BLA with right putamen/pallidum and MDD symptoms was found in PTSD+MDD. These findings indicate a relationship between the neural pathophysiology of PTSD+MDD compared with PTSD-alone and TEHC and may inform future clinical interventions.

Copyright © 2019. Published by Elsevier B.V.


Language: en

Keywords

Amygdala; Fear processing; Major depressive disorder; Post-traumatic stress disorder; Resting-state functional connectivity

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