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阿尔茨海默氏症成像联盟

Khalid Saifullah1, Gulam Mahfuz Chowdhury1, Arnold M Evia2

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概括
此摘要是机器生成的。

神经纤维光链 (NfL) 水平与大脑衰老相关,但白质过强度 (WMH) 介导神经退行,表明血管病理驱动老年人大脑变化.

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科学领域:

  • 神经学 神经学
  • 生物标志物 生物标志物
  • 神经成像是一种神经成像.

背景情况:

  • 神经纤维光链 (NfL) 是神经退行症的一个潜在生物标志物.
  • 在非痴呆老年人中,NfL,白质过强度 (WMH) 和神经退行症之间的关系尚未完全理解.
  • 血管病理作为调解者的作用需要调查.

研究的目的:

  • 研究非痴呆老年人的NfL,WMH和神经退行之间的相互作用.
  • 确定WMH是否调解了NfL和神经退行症之间的关联.
  • 为了澄清血管病理在大脑衰老中的作用.

主要方法:

  • 包括来自四项纵向衰老研究的202名非痴呆症老年人.
  • 在血液样本中测量NfL,并使用基于变形的形态测量 (DBM) 通过日志雅可比 (LogJ) 地图评估神经退行.
  • 从MRI扫描中分析了白质超强度 (WMH) 体积,并使用voxel-wise线性回归来评估关联,调整共变量.

主要成果:

  • NfL水平与大脑组织体积减少和心室扩大有关.
  • 在NfL水平和WMH负担之间发现了显著的积极关联.
  • WMH负担与神经退行症密切相关,它调解了NfL和神经退行症之间的关系.

结论:

  • NfL反映了大脑衰老的神经退行和血管方面.
  • 血管病理,由WMH表示,在驱动神经退行方面发挥着关键作用.
  • 这些发现强调了在脑衰老研究中考虑血管因素的重要性.