Abstract
Purpose
Major Depressive Disorder (MDD) and Insomnia Disorder (ID) are prevalent psychiatric conditions often occurring concurrently, leading to substantial impairment in daily functioning. Understanding the neurobiological underpinnings of these disorders and their comorbidity is crucial for develo** effective interventions. This study aims to analyze changes in functional connectivity within attention networks and default mode networks in patients with depression and insomnia.
Methods
The functional connectivity alterations in individuals with MDD, ID, comorbid MDD and insomnia (iMDD), and healthy controls (HC) were assessed from a cohort of 174 participants. They underwent rs-fMRI scans, demographic assessments, and scale evaluations for depression and sleep quality. Functional connectivity analysis was conducted using region-of-interest (ROI) and whole-brain methods.
Results
The MDD and iMDD groups exhibited higher Hamilton Depression Scale (HAMD) scores compared to HC and ID groups (P < 0.001). Both ID and MDD groups displayed enhanced connectivity between the left and right orbital frontal cortex compared to HC (P < 0.05), while the iMDD group showed reduced connectivity compared to HC and ID groups (P < 0.05). In the left insula, reduced connectivity with the right medial superior frontal gyrus was observed across patient groups compared to HC (P < 0.05), with the iMDD group showing increased connectivity compared to MDD (P < 0.05). Moreover, alterations in functional connectivity between the left thalamus and left temporal pole were found in iMDD compared to HC and MDD (P < 0.05). Correlation analyses revealed associations between abnormal connectivity and symptom severity in MDD and ID groups.
Conclusions
Our findings demonstrate distinct patterns of altered functional connectivity in individuals with MDD, ID, and iMDD compared to healthy controls. These findings contribute to a better understanding of the pathophysiology of depression and insomnia, which could be used as a reference for the diagnosis and treatments of these patients.
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Data availability
Data available upon request in line with relevant restrictions, e.g. privacy or ethical.
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Acknowledgements
This work was supported by the programs of the National Natural Science Foundation of China International Cooperation and Exchange Project (81761128036); National Natural Science Foundation of China Regional Science Fund Project (81960262, 81560235, 31760294); Guizhou Provincial Precision Diagnosis and Treatment International Scientific Cooperation Base for Severe Depressive Disorders (Guizhou Science and Technology Cooperation Platform Talent [2018]5802); Guizhou Province High-Level Innovative Talent Training Program—Hundred-Level Talent (Guizhou Science and Technology Cooperation Platform Talent [2016]5679); Guiyang Science and Technology Plan Project (Zhu Ke Contract [2018]1-94)
Funding
This work was supported by the programs of the National Natural Science Foundation of China International Cooperation and Exchange Project (81761128036); National Natural Science Foundation of China Regional Science Fund Project (81960262, 81560235, 31760294); Guizhou Provincial Precision Diagnosis and Treatment International Scientific Cooperation Base for Severe Depressive Disorders (Guizhou Science and Technology Cooperation Platform Talent [2018]5802); Guizhou Province High-Level Innovative Talent Training Program—Hundred-Level Talent (Guizhou Science and Technology Cooperation Platform Talent [2016]5679); Guiyang Science and Technology Plan Project (Zhu Ke Contract [2018]1–94).
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Yong-xue Hu, **g-yu Shi, Guang-yuan **a, Long-fei Liu, Pei-fan Li, Qing Shan and Yi-ming Wang designed the study. Yong-xue Hu and Yi-ming Wang participated in the conception of the study. **g-yu Shi, Guang-yuan **a, Long-fei Liu, Pei-fan Li and Qing Shan managed and conducted the statistical analyses and interpreted the data. All authors have read and approved the final manuscript.
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Hu, Yx., Shi, Jy., **a, Gy. et al. Analysis of functional connectivity changes in attention networks and default mode networks in patients with depression and insomnia. Sleep Breath (2024). https://doi.org/10.1007/s11325-024-03064-7
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DOI: https://doi.org/10.1007/s11325-024-03064-7