Journal Article

White matter disturbances in major depressive disorder: a coordinated analysis across 20 international cohorts in the ENIGMA MDD working group

Connolly, Colm G, Lagopoulos, Jim, Stein, Dan J, Schnell Knut, Baune, Bernhard T, Frodl, Thomas, Li, Meng, Schmaal Lianne, Enneking Verena, Yang, Tony T, Portella, Maria J, Krug Axel, Sim, Kang, Groenewold, Nynke A, Meinert, Susanne, Penninx Brenda W J H, Zhu, Alyssa, Renick, Lee, Veltman, Dick J, Ho, Tiffany C, Klimes-Dougan Bonnie, Jansen, Andreas, Kelly, Sinead, Sacchet, Matthew D, Danilenko, Konstantin V, Vives-Gilabert, Yolanda, Filimonova Elena, Thompson, Paul M, Cullen, Kathryn R, Gotlib, Ian H, Carballedo Angela, Walter, Henrik, Brak, Ivan V, MacMaster, Frank P, Isaev Dmitry, Kochunov, Peter, Martin, Walter, Vermeiren, Robert, Hatton, Sean N, Veer, Ilya M, McLellan Quinn, Shen Xueyi, Hickie, Ian B, Grotegerd Dominik, van Velzen Laura S, Nenadić Igor, Schreiner, Melinda Westlund, van der Wee Nic J A, Couvy-Duchesne Baptiste, Aftanas Lyubomir I, Aleman, Andre, Dannlowski Udo, Repple Jonathan, Bauer, Jochen, Wright, Margaret J, Tozzi Leonardo, ster Katharina, Osipov Evgeny, Martin, Nicholas G, Whalley, Heather C, McIntosh, Andrew M, Harris, Mathew A, Hawkins, Emma L, van Tol Marie-Jose, Kircher Tilo, Roos An

2020

Overview

Alterations in white matter (WM) microstructure have been implicated in the pathophysiology of major depressive disorder (MDD). However, previous findings have been inconsistent, partially due to low statistical power and the heterogeneity of depression. In the largest multi-site study to date, we examined WM anisotropy and diffusivity in 1305 MDD patients and 1602 healthy controls (age range 12–88 years) from 20 samples worldwide, which included both adults and adolescents, within the MDD Working Group of the Enhancing Neuroimaging Genetics through Meta-Analysis (ENIGMA) consortium. Processing of diffusion tensor imaging (DTI) data and statistical analyses were harmonized across sites and effects were meta-analyzed across studies. We observed subtle, but widespread, lower fractional anisotropy (FA) in adult MDD patients compared with controls in 16 out of 25 WM tracts of interest (Cohen’s d between 0.12 and 0.26). The largest differences were observed in the corpus callosum and corona radiata. Widespread higher radial diffusivity (RD) was also observed (all Cohen’s d between 0.12 and 0.18). Findings appeared to be driven by patients with recurrent MDD and an adult age of onset of depression. White matter microstructural differences in a smaller sample of adolescent MDD patients and controls did not survive correction for multiple testing. In this coordinated and harmonized multisite DTI study, we showed subtle, but widespread differences in WM microstructure in adult MDD, which may suggest structural disconnectivity in MDD.

• Publisher: Nature Publishing Group
• Subject: Anisotropy / Corpus callosum / Magnetic resonance imaging / Mental depression / Neuroimaging / Statistical analysis / Statistics / Substantia alba / Systematic review / Working groups