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阿尔茨海默氏症成像联盟

Nelly Joseph-Mathurin1, Charles D Chen2, Diana A Hobbs1

  • 1Washington University School of Medicine, St. Louis, MO, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
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概括
此摘要是机器生成的。

与粉样蛋白相关的成像异常 (ARIA-E) 与自体主导性阿尔茨海默病 (ADAD) 中粉样蛋白β (Aβ) 清除的减少有关. 这项研究观察到ARIA-E区域的PiB-PET吸收和Aβ面积分数减少,这表明Aβ清除和ARIA-E之间存在联系.

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科学领域:

  • 神经科学是一个神经科学.
  • 神经病理学神经病理学
  • 放射学 放射学是一门学科.

背景情况:

  • 与粉样蛋白相关的成像异常 (ARIA-E) 影响了大约19%的自体主导阿尔茨海默病 (ADAD) 患者,这些患者接受了抗粉样蛋白β单克隆抗体治疗.
  • 之前的研究表明,粉样β (Aβ) 清除和ARIA-E之间存在联系,ARIA-E似乎与PiB-PET摄入量下降相关.
  • 这项研究调查了长度神经成像,神经病理学和ARIA-E之间的关系,在一个ADAD个体中,该个体接受了gantenerumab治疗.

研究的目的:

  • 在经历ARIA-E发作的ADAD患者中比较纵向神经影像和神经病理学.
  • 调查粉样β (Aβ) 清除,PiB-PET吸收和ARIA-E.之间的关联.
  • 为了检查ARIA-E病变的神经病理学特征.

主要方法:

  • 纵向PiB-PET和MRI扫描是在四年内获得的.
  • 大脑捐赠允许对ARIA-E受影响区域进行神经病理学分析,使用Aβ,病,微质和星球细胞的免疫组织化学.
  • 量化了Aβ和其他标记物的面积分数 (AFs) 并与PiB-PET标准化摄入值比率 (SUVRs) 进行比较.

主要成果:

  • 在最初的两年里,PiB-PET的吸收量增加了,在随后的两年里下降了,与ARIA-E发作相吻合.
  • 在ARIA-E区域观察到PiB-PET SUVR的显著下降,与正常出现的硫相比.
  • 最后一次访问时PiB摄入量较低与Aβ面积分数较低相关,特别是在ARIA-E受影响地区.

结论:

  • 初步发现表明,ARIA-E与纵向PiB-PET吸收减少和Aβ面积分数减少有关.
  • 这些结果支持ARIA-E,PiB-PET观察到的变化和由尸检确认的局部Aβ去除之间的联系.
  • 这些发现突出了Aβ清除机制在ARIA-E.发展中的潜在作用.