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White matter microstructural alterations across four major psychiatric disorders: mega-analysis study in 2937 individuals.

Abstract：

:Identifying both the commonalities and differences in brain structures among psychiatric disorders is important for understanding the pathophysiology. Recently, the ENIGMA-Schizophrenia DTI Working Group performed a large-scale meta-analysis and reported widespread white matter microstructural alterations in schizophrenia; however, no similar cross-disorder study has been carried out to date. Here, we conducted mega-analyses comparing white matter microstructural differences between healthy comparison subjects (HCS; N = 1506) and patients with schizophrenia (N = 696), bipolar disorder (N = 211), autism spectrum disorder (N = 126), or major depressive disorder (N = 398; total N = 2937 from 12 sites). In comparison with HCS, we found that schizophrenia, bipolar disorder, and autism spectrum disorder share similar white matter microstructural differences in the body of the corpus callosum; schizophrenia and bipolar disorder featured comparable changes in the limbic system, such as the fornix and cingulum. By comparison, alterations in tracts connecting neocortical areas, such as the uncinate fasciculus, were observed only in schizophrenia. No significant difference was found in major depressive disorder. In a direct comparison between schizophrenia and bipolar disorder, there were no significant differences. Significant differences between schizophrenia/bipolar disorder and major depressive disorder were found in the limbic system, which were similar to the differences in schizophrenia and bipolar disorder relative to HCS. While schizophrenia and bipolar disorder may have similar pathological characteristics, the biological characteristics of major depressive disorder may be close to those of HCS. Our findings provide insights into nosology and encourage further investigations of shared and unique pathophysiology of psychiatric disorders.

journal_name

Mol Psychiatry

journal_title

Molecular psychiatry

authors

Koshiyama D,Fukunaga M,Okada N,Morita K,Nemoto K,Usui K,Yamamori H,Yasuda Y,Fujimoto M,Kudo N,Azechi H,Watanabe Y,Hashimoto N,Narita H,Kusumi I,Ohi K,Shimada T,Kataoka Y,Yamamoto M,Ozaki N,Okada G,Okamoto Y,Ha

doi

10.1038/s41380-019-0553-7

subject

Has Abstract

pub_date

2020-04-01 00:00:00

pages

883-895

issue

eissn

1359-4184

issn

1476-5578

pii

10.1038/s41380-019-0553-7

journal_volume

pub_type

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White matter microstructural alterations across four major psychiatric disorders: mega-analysis study in 2937 individuals.