生物标志物 生物标志物
Hossein Moein Taghavi1, Mahta Karimpoor1, Eric van Staalduinen1
1Stanford University School of Medicine, Stanford, CA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
概括
早期的阿尔茨海默氏症和帕金森病的变化发生在嗅觉皮层. 皮质皮质中的粉样蛋白和病理与疾病严重程度相关,与海马不同.
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
- 嗅觉系统 嗅觉系统
背景情况:
- 皮质皮质,一个嗅觉区域,可能会显示早期的阿尔茨海默氏症 (AD) 和帕金森病 (PD) 病理.
- 粉样蛋白-粉样蛋白重叠在中间叶突出,但其在皮质皮层中的关联尚未得到充分理解.
研究的目的:
- 量化皮质状皮质和其他中间时结构中同时吸收的粉样蛋白和陶蛋白.
- 为了在AD,轻度认知障碍 (MCI),健康对照 (HC) 和PD队列中比较这些病理.
主要方法:
- 双重PET-MR成像使用了粉样蛋白 (F-Florbetaben) 和 (F-PI-2620) 标记物.
- 进行了自动和手动对皮质皮质,内膜-外膜皮质,杏仁体和海马体的细分.
- 分析了47名参与者的横截面数据 (AD,MCI,HC,PD).
主要成果:
- 全球和区域的粉样蛋白吸收 (皮形皮质,内膜-外膜,杏仁体) 随着疾病的严重程度而增加,但不是在海马体.
- 在这些地区,粉样蛋白负担在粉样蛋白阳性HC中高于粉样蛋白阴性HC.
- 粉样蛋白与体内皮层,皮质皮层和杏仁核中的吸收具有正相关性,但不是海马.
结论:
- 在初级嗅觉皮质 (piriform皮质) 中观察到粉样蛋白-PET的早期增加.
- 状皮质中的粉样蛋白积累与的吸收有很强的相关性,类似于内腔皮质和杏仁体.
- 这些发现凸显了与海马体相比,神经退行性疾病中皮质皮质的独特病理特征.
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