具有自杀风险的大型抑郁症患者的大脑结构差异:来自DIRECT联盟的证据
Tian Li1, Yimeng Wang1, Feng Li1
1The National Clinical Research Center for Mental Disorders & Beijing Key Laboratory of Mental Disorders & Beijing Institute for Brain Disorders Center of Schizophrenia, Beijing Anding Hospital, Capital Medical University, Beijing, China.
Journal of affective disorders
|January 19, 2026
概括
面临自杀风险的严重抑郁症 (MDD) 患者表现出额叶灰质体积的减少,特别是在左前环皮层 (ACC). 这种ACC体积减少可能表明MDD患者未来的自杀风险.
科学领域:
- 神经成像是一种神经成像.
- 精神病学是一个精神病学.
- 神经科学是一个神经科学.
背景情况:
- 在主要抑郁症患者 (MDD) 中观察到结构性大脑变化,但关于自杀风险相关差异的共识缺乏.
- 了解MDD中自杀风险的神经生理机制对于开发有针对性的干预措施至关重要.
研究的目的:
- 通过使用DIRECT联盟数据,调查MDD患者与没有自杀风险之间的结构性大脑差异.
- 为了确定MDD中自杀风险的潜在神经成像生物标志物.
主要方法:
- 包括203名健康对照组 (HCs),208名没有自杀风险的MDD患者 (MDD-NSR) 和376名具有自杀风险的MDD患者 (MDD-SR).
- 使用T1加权的MRI数据,使用DPABISurf处理,以量化皮质表面积,厚度和皮质灰质量 (CGM) 量.
主要成果:
- 与HC相比,MDD-SR和MDD-NSR组显示右侧轨道前皮层 (OFC) 的表面积减少,左侧前带状皮层 (ACC) 和右侧OFC的CGM体积减少.
- 观察到左侧ACCCGM体积下降的显著梯度:MDD-SR < MDD-NSR < HC.
- 支持矢量机 (SVM) 分析显示差异化有限,但SHAP分析发现左ACC CGM体积是自杀风险的关键特征.
结论:
- 患有自杀风险的MDD患者表现出明显的额叶结构变化,包括皮质表面积和CGM体积的减少.
- 减少左ACCCGM体积可能成为预测MDD患者自杀风险的潜在神经成像生物标志物.
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