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阿尔茨海默氏症成像联盟

Wiesje Pelkmans1,2, Mahnaz Shekari1,3,4, Armand González Escalante1,4

  • 1Barcelonaβeta Brain Research Center (BBRC), Pasqual Maragall Foundation, Barcelona, Spain.

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概括
此摘要是机器生成的。

在氨酸231 (p-tau231) 中酸化的可溶性可能激活微质反应,可能减缓早期阿尔茨海默病中粉样β (Aβ) 的积累. 这表明,增强微质功能可能是临床前阿尔茨海默病的治疗策略.

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科学领域:

  • 神经科学是一个神经科学.
  • 生物化学 生物化学
  • 病理学 病理学 病理学

背景情况:

  • 在氨酸231 (p-tau231) 中化溶性陶在临床前阿尔茨海默氏症 (AD) 中增加,先前的粉样β (Aβ) PET阳性.
  • 早期tau酸化与Aβ积累的联系机制尚不清楚,但微质反应性与Aβ动态有关.
  • 微质可以清除Aβ (保护性) 或通过神经炎症 (有害) 促进其积累.

研究的目的:

  • 在认知不受损的个体中调查CSF p-tau231,纵向Aβ积累和CSF sTREM2水平之间的关联.
  • 为了确定微质反应率,由sTREM2表示,介于p-tau231和Aβ积累之间的关系.

主要方法:

  • 研究了187名来自ALFA+队列的认知不受损的个体,并进行了重复的Aβ-PET成像.
  • 使用线性回归和调解分析来评估CSF p-tau231,Aβ-PET积累和CSF sTREM2之间的关系.
  • 对基线Aβ水平,年龄,APOE-ε4状态和性别进行调整的模型.

主要成果:

  • 较高的CSF p-tau231水平与更快的Aβ-PET积累相关 (p<0.01).
  • 增加的p-tau231与增加的CSF sTREM2 (p<0.001) 有关.
  • 较高的sTREM2水平与Aβ积累率的降低有关 (p<0.01),介导了p-tau231-Aβ关系的27%.

结论:

  • 早期的可溶性酸化可能会增强TREM2介导的微质反应.
  • 这种微质反应可能起到预防临床前AD的Aβ聚合的保护作用.
  • 在临床前AD中增强微质功能是延迟Aβ积累的潜在治疗策略.