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阿尔茨海默氏症成像联盟

Ting Qiu1,2,3,4, Zhen-Qi Liu5,6, Jonathan Gallego Rudolf5,7,8

  • 1Integrated Program in Neurosciences, McGill University, Montréal, QC, Canada.

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概括
此摘要是机器生成的。

阿尔茨海默氏病 (AD) 的大脑变化在症状出现前几十年就开始,皮质厚度的初始增加和与粉样β (Aβ) 病理学相关的平均扩散度的减少. 这些非线性轨迹在Aβ阳性开始之前发生.

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科学领域:

  • 神经成像是一种神经成像.
  • 阿尔茨海默氏症疾病研究研究
  • 大脑结构分析 分析大脑结构

背景情况:

  • 阿尔茨海默病 (AD) 涉及粉样β (Aβ) 和病理,通常与灰质损失有关.
  • 在临床前的AD可能矛盾地显示皮质厚度 (CT) 增加.
  • 纵向神经成像对于了解早期AD结构变化至关重要.

研究的目的:

  • 在10年内调查Aβ和tau病理和大脑结构 (CT,平均扩散度 (MDT),海马体积) 之间的关联.
  • 为了跟踪与Aβ阳性时间线相对的纵向结构变化.
  • 检查大脑结构变化的非线性轨迹在临床前和前期AD.

主要方法:

  • 在Aβ-负和Aβ-正组上进行部分最小平方分析 (PLS).
  • 对AD病理和结构措施的横截面和纵向评估.
  • 从Aβ阳性开始追踪结构变化的时间估计.

主要成果:

  • 较高的Aβ与Aβ-组的MDT降低和CT增加相关;在Aβ+组相反.
  • MDT显示了一个U形图案,CT显示了一个反向的U形图案与Aβ病理.
  • 在AD重点地区观察到的Aβ阳性之前,结构变化出现了多年.

结论:

  • 在阿尔茨海默病中,大脑的结构变化在症状出现前几十年开始,遵循非线性轨迹.
  • 最初的CT增加和MDT减少可能与Aβ沉积,神经炎症或大脑胀有关.
  • 这些发现凸显了临床前阿尔茨海默病早期复杂的结构性适应.