改变白质结构连接的复杂模式 在治疗耐药抑郁症的"主观估值网络"中
Benjamin Maas1, Rachel Jones2, Christinia Johnson3
1School of Biomedical Engineering and Sciences, Virginia Tech-Wake Forest University School of Medicine, Winston-Salem, North Carolina.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
耐治疗抑郁症 (TRD) 显示出广泛的白质完整性障碍. 在TRD中,特定的大脑网络的改变可能是无神经症和治疗耐药性的基础.
科学领域:
- 神经科学是一个神经科学.
- 放射学 放射学是一门学科.
- 精神病学是一个精神病学.
背景情况:
- 耐治疗抑郁症 (TRD) 是一个重大的临床挑战.
- 了解TRD的神经生物学基础对于改善治疗方法至关重要.
- 主观评价网络 (SVN) 涉及到有动机的行为和情绪调节,在抑郁症中经常发生变化.
研究的目的:
- 调查白质微观结构和TRD个体的SVN中的结构连接性.
- 为了确定潜在的神经影像生物标志物,用于抑郁症治疗耐药性.
- 探索白质完整性,抑郁症严重程度和无情感之间的相关性.
主要方法:
- 扩散张力成像 (DTI) 用于分析44名TRD患者和42名对照者的白质完整性.
- 基于路径的空间统计 (TBSS) 和概率路径绘图评估了分数异构 (FA) 和SVN结构连接性.
- 关键的SVN区域包括vmPFC,ACC,腹状条纹体和胰岛.
主要成果:
- 患有TRD的个体在左侧未切割的囊,左下面的前后囊和前带膜中显示出减少的FA.
- 连接insula-vmPFC,striatum-insula和striatum-vmPFC的SVN子电路显示结构连接性发生了变化.
- 在insula-vmPFC和striatum-vmPFC通道中观察到超连接性,而在TRD患者中,striatum-insula通道显示出低连接性.
结论:
- TRD与广泛的白质微观结构破坏和改变的SVN子电路连接性有关.
- 这些结构变化,包括过度和低连接性,可能是TRD核心症状的基础,如无情感.
- 改变的SVN结构连接性可能是TRD病理生理学的关键因素,可能作为个性化治疗的生物标志物.
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