双相抑郁症和单相抑郁症的不同连接模式:功能连接多变量模式分析研究。

IF 2.4 4区 医学 Q3 NEUROSCIENCES BMC Neuroscience Pub Date : 2024-09-27 DOI:10.1186/s12868-024-00895-8
Martin Pastrnak, Monika Klirova, Martin Bares, Tomas Novak
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引用次数: 0

摘要

背景:尽管双相情感障碍(BD)和重度抑郁障碍(MDD)患者的潜在神经生物学特征不同,且人们对其了解甚少,但他们的抑郁发作症状却很相似,这往往会导致误诊和治疗不当。这项探索性研究利用FC多变量模式分析(fc-MVPA)对全脑功能连接(FC)进行了研究,以确定哪些FC模式最有能力区分目前患有BD I型(BD I)和MDD的抑郁症患者:在横断面设计中,41 名 I 型 BD 患者、40 名 MDD 患者和 63 名对照组参与者完成了静息状态功能磁共振成像扫描。CONN工具箱中实现的数据驱动fc-MVPA用于识别BD患者和MDD患者之间具有不同FC模式的集群。确定的集群被用作基于种子的事后分析(SBA)的种子,以揭示相关的连通性模式,然后进行二级 ROI 到 ROI 分析,以描述 BD I 患者、MDD 患者和对照组之间这些模式的连通性差异:结果:FC-MVPA发现了一个位于右额极(RFP)的集群。随后的 SBA 发现,与 BD 患者相比,MDD 患者的 RFP 与后扣带回皮层(PCC)之间以及 RFP 与左颞下/中回(LI/MTG)之间的 FC 更大,而 RFP 与左侧中央前回(LPCG)、左侧舌回/枕叶皮层(LLG/OCC)和右侧枕叶皮层(ROCC)之间的 FC 更小。与对照组相比,ROI-to-ROI分析显示,BD患者的RFP与PCC之间的FC较低,而RFP与LPCG、LLG/OCC和ROCC之间的FC较高;MDD患者的RFP与LLG/OCC和ROCC之间的FC较低,而RFP与LI/MTG之间的FC较高:结论:目前患有抑郁症的BD患者与患有MDD的患者在RFP FC模式上的差异提示了潜在的神经影像标记物,应对此进行进一步研究。具体来说,BD 患者表现出 RFP 与运动和视觉网络之间的 FC 增加,这与精神运动症状以及为抵御注意力分散而增强的补偿性额顶叶 FC 有关。相比之下,MDD 患者则表现出 RFP 与默认模式网络之间的 FC 增加,这与持续的自我专注和反刍有关。
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Distinct connectivity patterns in bipolar and unipolar depression: a functional connectivity multivariate pattern analysis study.

Background: Patients with bipolar disorder (BD) and major depressive disorder (MDD) exhibit depressive episodes with similar symptoms despite having different and poorly understood underlying neurobiology, often leading to misdiagnosis and improper treatment. This exploratory study examined whole-brain functional connectivity (FC) using FC multivariate pattern analysis (fc-MVPA) to identify the FC patterns with the greatest ability to distinguish between currently depressed patients with BD type I (BD I) and those with MDD.

Methodology: In a cross-sectional design, 41 BD I, 40 MDD patients and 63 control participants completed resting state functional magnetic resonance imaging scans. Data-driven fc-MVPA, as implemented in the CONN toolbox, was used to identify clusters with differential FC patterns between BD patients and MDD patients. The identified cluster was used as a seed in a post hoc seed-based analysis (SBA) to reveal associated connectivity patterns, followed by a secondary ROI-to-ROI analysis to characterize differences in connectivity between these patterns among BD I patients, MDD patients and controls.

Results: FC-MVPA identified one cluster located in the right frontal pole (RFP). The subsequent SBA revealed greater FC between the RFP and posterior cingulate cortex (PCC) and between the RFP and the left inferior/middle temporal gyrus (LI/MTG) and lower FC between the RFP and the left precentral gyrus (LPCG), left lingual gyrus/occipital cortex (LLG/OCC) and right occipital cortex (ROCC) in MDD patients than in BD patients. Compared with the controls, ROI-to-ROI analysis revealed lower FC between the RFP and the PCC and greater FC between the RFP and the LPCG, LLG/OCC and ROCC in BD patients; in MDD patients, the analysis revealed lower FC between the RFP and the LLG/OCC and ROCC and greater FC between the RFP and the LI/MTG.

Conclusions: Differences in the RFP FC patterns between currently depressed patients with BD and those with MDD suggest potential neuroimaging markers that should be further examined. Specifically, BD patients exhibit increased FC between the RFP and the motor and visual networks, which is associated with psychomotor symptoms and heightened compensatory frontoparietal FC to counter distractibility. In contrast, MDD patients exhibit increased FC between the RFP and the default mode network, corresponding to sustained self-focus and rumination.

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来源期刊
BMC Neuroscience
BMC Neuroscience 医学-神经科学
CiteScore
3.90
自引率
0.00%
发文量
64
审稿时长
16 months
期刊介绍: BMC Neuroscience is an open access, peer-reviewed journal that considers articles on all aspects of neuroscience, welcoming studies that provide insight into the molecular, cellular, developmental, genetic and genomic, systems, network, cognitive and behavioral aspects of nervous system function in both health and disease. Both experimental and theoretical studies are within scope, as are studies that describe methodological approaches to monitoring or manipulating nervous system function.
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