Altered interhemispheric functional connectivity in patients with obsessive‐compulsive disorder and its potential in therapeutic response prediction

Author:

Yan Haohao1,Zhang Yingying1,Shan Xiaoxiao1,Li Huabing2,Liu Feng3,Xie Guojun4,Li Ping5,Guo Wenbin1ORCID

Affiliation:

1. Department of Psychiatry, National Clinical Research Center for Mental Disorders, and National Center for Mental Disorders The Second Xiangya Hospital of Central South University Changsha China

2. Department of Radiology The Second Xiangya Hospital of Central South University Changsha China

3. Department of Radiology Tianjin Medical University General Hospital Tianjin China

4. Department of Psychiatry The Third People's Hospital of Foshan Foshan China

5. Department of Psychiatry Qiqihar Medical University Qiqihar China

Abstract

AbstractThe trajectory of voxel‐mirrored homotopic connectivity (VMHC) after medical treatment in obsessive‐compulsive disorder (OCD) and its value in prediction of treatment response remains unclear. This study aimed to investigate the pathophysiological mechanism of OCD, as well as biomarkers for prediction of pharmacological efficacy. Medication‐free patients with OCD and healthy controls (HCs) underwent magnetic resonance imaging. The patients were scanned again after a 4‐week treatment with paroxetine. The acquired data were subjected to VMHC, support vector regression (SVR), and correlation analyses. Compared with HCs (36 subjects), patients with OCD (34 subjects after excluding two subjects with excessive head movement) exhibited significantly lower VMHC in the bilateral superior parietal lobule (SPL), postcentral gyrus, and calcarine cortex, and VMHC in the postcentral gyrus was positively correlated with cognitive function. After treatment, the patients showed increased VMHC in the bilateral posterior cingulate cortex/precuneus (PCC/PCu) with the improvement of symptoms. SVR results showed that VMHC in the postcentral gyrus at baseline could aid to predict a change in the scores of OCD scales. This study revealed that SPL, postcentral gyrus, and calcarine cortex participate in the pathophysiological mechanism of OCD while PCC/PCu participate in the pharmacological mechanism. VMHC in the postcentral gyrus is a potential predictive biomarker of the treatment effects in OCD.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Tianjin City

Science and Technology Program of Hunan Province

Publisher

Wiley

Subject

Cellular and Molecular Neuroscience

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