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Alzheimer's Disease: Overview01:26

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阿尔茨海默氏症成像联盟

Christopher C Rowe1,2, Azadeh Feizpour1,3, Pierrick Bourgeat4

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概括

这项研究确定了区域TAU PET值,并发现TAU在大脑中的值.

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科学领域:

  • 神经成像是一种神经成像.
  • 生物标志物 生物标志物
  • 阿尔茨海默氏症疾病研究研究

背景情况:

  • 定子发射断层扫描 (PET) 的标准百叶形 (CTR) 方法在不同的标记物中提供一致的测量.
  • 这项研究旨在确定高的区域CTR值,并探索其与阿米洛伊德-β (Aβ),神经退行和整个阿尔茨海默病 (AD) 谱中的认知功能之间的关系.

研究的目的:

  • 确定高PET的区域百叶状物 (CTR) 值.
  • 评估阿尔茨海默病 (AD) 谱中CTR,粉样β (Aβ) 负担,神经退行和认知状态之间的关系.
  • 在认知正常 (CU),轻度认知障碍 (MCI) 和临床AD群体中确定叶叶 (MTL) 和皮质的患病率.

主要方法:

  • 利用了AIBL-ADNeT研究中的924名参与者的数据,包括认知不受损 (CU),MCI和临床AD个体.
  • 进行了F-MK6240 tau PET,F-NAV4694 Aβ PET,MRI和认知评估.
  • 分析了全球和区域tau (CTR),全球Aβ (百叶状),大脑缩和认知表现之间的相关性.

主要成果:

  • 确立了2个SD tau PET值:在Aβ-负 (A-) 认知无损 (CU) 个体中,叶 (MTL) 的CTR为11个,叶 (TP) 皮层的CTR为15个.
  • 观察到Aβ和tau之间的非线性关联,皮质tau不经常低于60百分点 (CL).
  • 发现在A+ MCI和AD中,皮质与年龄和皮质体积相反相关;仅限于MTL的主要影响了情节性记忆. 在缺少tau的情况下,Aβ与认知能力下降没有相关性.

结论:

  • 成功建立了区域CTR值,并确定了阿尔茨海默病 (AD) 谱中MTL和皮质的流行率.
  • 证实皮质的很少被检测到在Aβ的60百度线 (CL) 以下.
  • 证明皮质与认知障碍和大脑缩有很强的相关性,而仅限于MTL的与轻度记忆缺陷有关.