在严重抑郁症中剖析皮层厚度异常的异质性:一项大型ENIGMA MDD规范建模研究
J M M Bayer1,2,3,4, L S van Velzen2,3, E Pozzi2,3
1Donders Institute for Brain, Cognition and Behaviour, the Netherlands.
bioRxiv : the preprint server for biology
|April 1, 2025
概括
大型抑郁症 (MDD) 显示出显著的大脑结构异质性. 个体化皮质厚度偏差可以识别严重抑郁症标志物和保护因素.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 医疗成像医学成像
背景情况:
- 大型抑郁症 (MDD) 的特点在于临床表现和神经生物学上的显著异质性.
- 这种异质性可能会掩盖MDD患者的结构性大脑异常的识别.
- 规范型建模提供了一种方法,可以对不同个体的大脑结构的区域变异性进行索引.
研究的目的:
- 将规范建模应用于来自ENIGMA MDD联盟的大型数据集.
- 从标准中推导出个性化的皮质厚度 (CT) 偏差,考虑年龄,性别和位置.
- 研究这些CT偏差与MDD的临床特征之间的关系.
主要方法:
- 在3,181名健康对照 (HC) 上训练了一种规范模型,使用35个CT测量.
- 计算了2,119名HC和3,645名MDD个体的个体化z-score偏差.
- 对每个人来说,CT z-score 分类为正常或极端 (上/下2.5%).
主要成果:
- 皮层厚度 (CT) 的分布在MDD和HC组之间在很大程度上重叠 (92-98%).
- 与HC相比,MDD个体的皮层总体上较薄.
- 34.5%的MDD个体和30%的HC个体在至少一个区域表现出极端CT偏差.
- 极端负的CT偏差与MDD的早期发病和更大的症状严重程度相关.
- 极端阳性CT偏差与缓解,非抗抑郁药的使用和不那么严重的症状有关.
结论:
- 在MDD患者中CT异常的空间分布存在显著的异质性.
- 皮层厚度测量显示MDD和健康个体之间存在很大的重叠.
- 个体化极端CT偏差可以识别具有更严重临床特征和潜在保护因素的个体.
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