皮质粉样蛋白负担与基底前脑体积有关 主观认知衰退
Marcel Daamen1, Lukas Scheef1,2,3, Shumei Li1
1German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.
Journal of Alzheimer's disease : JAD
|August 28, 2023
概括
患有早期阿尔茨海默氏病 (AD) 症状和粉样斑块的个体表现出基底前脑 (BF) 体积减少. 这表明BF完整性的早期变化,可能与大脑中粉样蛋白负担的增加有关.
科学领域:
- 神经成像是一种神经成像.
- 神经病理学神经病理学
- 认知能力下降 认知能力下降
背景情况:
- 胆基底前脑缩 (BF) 在阿尔茨海默病 (AD) 中很常见,但在早期阶段不太了解.
- 主观认知衰退 (SCD) 代表了AD连续性的早期阶段.
研究的目的:
- 调查主观认知衰退 (SCD) 个体的基础前脑 (BF) 体积减少,这些个体表现出阿尔茨海默氏症 (AD) 病理变化.
- 探索SCD中BF体积和粉样蛋白负荷之间的关系.
主要方法:
- 对比基于MRI的BF体积在粉素阳性和粉素阴性SCD个体 (N=24个).
- 使用的Florbetaben PET用于粉样蛋白状况和Centiloid (CL) 用于皮质粉样蛋白负担.
- 评估了BF体积和CL值之间的关联.
主要成果:
- 总体BF体积和Ch4亚区域体积接近粉素阳性SCD个体减少的显著性 (分别p=0.061和p=0.059).
- 在BF体积 (总和Ch4) 和皮质粉样蛋白负担 (CL值) 之间发现了显著的逆相关性.
结论:
- 粉样蛋白阳性SCD个体表现出基础前脑 (BF) 完整性的早期变化,支持他们在AD连续性中的过渡性作用.
- 这些发现表明,一种渐进的过程,即粉样蛋白负荷的增加会影响粉样蛋白完整性.
- 需要进一步的研究来确定BF变化是否发生在可通过PET检测的较低的粉样蛋白水平.
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