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Published in: BMC Psychiatry 1/2021

Open Access 01-12-2021 | Schizophrenia | Research

Characteristics of the corpus callosum in chronic schizophrenia treated with clozapine or risperidone and those never-treated

Authors: Bo Tao, Yuan Xiao, Hengyi Cao, Wenjing Zhang, Chengmin Yang, Rebekka Lencer, Qiyong Gong, Su Lui

Published in: BMC Psychiatry | Issue 1/2021

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Abstract

Background

The corpus callosum (CC) deficits have been well documented in chronic schizophrenia. However, the long-term impacts of antipsychotic monotherapies on callosal anatomy remain unclear. This cross-sectional study sought to explore micro- and macro-structural characteristics of the CC in never-treated patients and those with long-term mono-antipsychotic treatment.

Methods

The study included 23 clozapine-treated schizophrenia patients (CT-SCZ), 19 risperidone-treated schizophrenia patients (RT-SCZ), 23 never-treated schizophrenia patients (NT-SCZ), and 35 healthy controls (HCs). High resolution structural images and diffusion tensor imaging (DTI) data for each participant were obtained via a 3.0 T MR scanner. FreeSurfer was used to examine the volumes and fractional anisotropy (FA) values of the CC for each participant.

Results

There were significant deficits in the total and sub-regional CC volume and white matter integrity in NT-SCZ in comparison with healthy subjects. Compared with NT-SCZ, both CT-SCZ and RT-SCZ showed significantly increased FA values in the anterior CC region, while only RT-SCZ showed significantly increased volume in the mid-anterior CC region. Moreover, the volume of the mid-anterior CC region was significantly smaller in CT-SCZ compared to HCs. No correlations of clinical symptoms with callosal metrics were observed in schizophrenia patients.

Conclusions

Our findings provide insight into micro- and macro-structural characteristics of the CC in chronic schizophrenia patients with or without antipsychotics. These results suggest that the pathology itself is responsible for cerebral abnormalities in schizophrenia and that chronic exposure to antipsychotics may have an impact on white matter structure of schizophrenia patients, especially in those with risperidone treatment.
Literature
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Metadata
Title
Characteristics of the corpus callosum in chronic schizophrenia treated with clozapine or risperidone and those never-treated
Authors
Bo Tao
Yuan Xiao
Hengyi Cao
Wenjing Zhang
Chengmin Yang
Rebekka Lencer
Qiyong Gong
Su Lui
Publication date
01-12-2021
Publisher
BioMed Central
Published in
BMC Psychiatry / Issue 1/2021
Electronic ISSN: 1471-244X
DOI
https://doi.org/10.1186/s12888-021-03552-0

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