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Jiajia Wu,1,2,* Shuangyu Qi,1,2,* Wei Yu,3,* Yujun Gao,4 Jun Ma1,2,4 1Department of Psychiatry, Wuhan Mental Health Center, Wuhan, People’s Republic of China; 2Wuhan Hospital for Psychotherapy, Wuhan, People’s Republic of China; 3Department of Psychiatry, Xianning Bode Mental Hospital, Xianning, People’s Republic of China; 4Department of Psychiatry, Renmin Hospital of Wuhan University, Wuhan, People’s Republic of China*These authors contributed equally to this workCorrespondence: Jun Ma, Department of Psychiatry, Wuhan Mental Health Center, No. 89, Gongnongbing Road, Wuhan, Hubei Province, People’s Republic of China, Email majun0313@wo.cn; Yujun Gao, Department of Psychiatry, Renmin Hospital of Wuhan University, No. 99 Zhangzhidong Road, Wuhan, Hubei Province, People’s Republic of China, Email Gaoyujun19820214@163.comIntroduction: Abnormal brain networks with emotional response in bipolar disorder (BD). However, there have been few studies on the local consistency between manic episodes in drug-naive first-episode BD patients and healthy controls (HCs). The purpose of this study is to evaluate the utility of neural activity values analyzed by Regional Homogeneity (ReHo).Methods: Thirty-seven manic episodes in first-episode, drug-naive BD patients and 37 HCs participated in resting-state functional magnetic resonance rescanning and scale estimation. Reho and receiver operating characteristic (ROC) curve methods were used to analyze the imaging data. Support vector machine (SVM) method was used to analyze ReHo in different brain regions.Results: Compared to HCs, ReHo increased in the left middle temporal gyrus (MTG.L), posterior cingulate gyrus (PCG), inferior parietal gyrus, and bilateral angular gyrus, and decreased in the left dorsolateral superior frontal gyrus in target group. The ROC results showed that the ReHo value of the left PCG could discriminate the target group from the HCs, and the AUC was 0.8766. In addition, the results of the support vector machine show that the increase in ReHo value in the left PCG can effectively discriminate the patients from the controls, with accuracy, sensitivity, and specificity of 86.02%, 86.49%, and 81.08%, respectively.Conclusion: The increased activity of the left PCG may contribute new evidence of participation in the pathophysiology of manic episodes in first-episode, drug-naive BD patients. The Reho value of the left posterior cingulate gyrus may be a potential neuroimaging biomarker to discriminate target group from HCs.Keywords: bipolar disorder, first-episode, drug-naïve, manic episode, left posterior cingulate gyrus, regional homogeneity |
