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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
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相关实验视频

Updated: Jun 16, 2025

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
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网络之间的连接性增加:Tau升高和疾病进展的风险因素.

Seyed Hani Hojjati1, Tracy A Butler1, José A Luchsinger2

  • 1Department of Radiology, Brain Health Imaging Institute, Weill Cornell Medicine, New York, NY, United States.

Neuroscience letters
|August 17, 2024
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概括

大脑中网络之间的连接增加可能预测未来的阿尔茨海默病 (AD) 进展. 这一发现表明纠传播的关键机制,并为早期AD病原体提供了洞察力.

关键词:
阿尔茨海默氏症是阿尔茨海默氏症的一种疾病.网络之间的连接性 网络之间的连接性阳位子辐射断层扫描 (PET)临床前阶段 临床前阶段休息状态功能性磁共振成像 (rs-fMRI) 进行.塔乌·塔乌 (Tau Tau) 是一个

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科学领域:

  • 神经科学是一个神经科学.
  • 医疗成像医学成像
  • 老年学是一门学科.

背景情况:

  • 神经纤维质团是阿尔茨海默病 (AD) 的标志.
  • 病理通常始于中间叶 (MTL),但传播机制尚不清楚.
  • 大脑连接模式随着年龄的增长和临床前阿尔茨海默病变化而变化,观察到网络之间的连接性增加.

研究的目的:

  • 调查网络之间的连接性增加在促进早期阿尔茨海默病中tau传播中的作用.
  • 通过连接模式识别未来tau升高和AD进展风险的个体.

主要方法:

  • 在2-3年内对46名健康老年参与者的长度研究.
  • 使用了静止状态功能性MRI (rs-fMRI),结构性MRI和18F-MK6240PET标记器.
  • 使用无监督的聚合集群来分析连接性和陶沉积.

主要成果:

  • 网络之间的连接性增加的个体在未来显示出更高的tau沉积和脑内皮层稀释.
  • 网络间连接性更高与选择性提醒测试 (SRT) 的延迟得分更低相关.
  • 在边缘网络中,网络之间的连接性增加与tau的进展密切相关,特别是在β-粉样蛋白阳性个体中.

结论:

  • 网络之间的连接性增加是未来陶沉积和阿尔茨海默病进展的预测因素.
  • 这一发现支持了改变大脑连接性在AD病变发生过程中起到关键作用的假设.
  • 这项研究增强了对在临床前阶段AD发展的理解.