APOE4对溶性和不溶性病理的影响主要受到粉样β的影响
Claudia Cicognola1,2, Gemma Salvadó1, Ruben Smith1,2
1Clinical Memory Research Unit, Department of Clinical Sciences Malmö, Faculty of Medicine, Lund University, 22184 Lund, Sweden.
Brain : a journal of neurology
|January 16, 2025
概括
作为阿尔茨海默病的风险因素的APOE4基因基因,当粉样β (Aβ) 存在时,对tau积累的独立影响很小. 不管APOE4状态如何,Aβ病理主要驱动着tau的积累.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 阿尔茨海默氏症疾病研究研究
背景情况:
- APOE4等位基因是散发性阿尔茨海默病 (AD) 最强的遗传风险因素.
- APOE4与陶积累的关联不太清楚,可能取决于粉样β (Aβ) 负载.
- 相互矛盾的研究结果凸显了需要澄清APOE4在病理学的独立作用.
研究的目的:
- 研究APOE4载体对陶积累 (不溶性陶纠和溶性p-tau217) 的独立和相互作用影响.
- 确定Aβ负载是否介导了APOE4和tau病理之间的关系.
- 在三个独立的纵向队列中分析这些关联.
主要方法:
- 研究了三个纵向队列 (BioFINDER-1,BioFINDER-2,WRAP),其中包括1370名认知正常和449名MCI受试者.
- 使用tau-PET,可溶性p-tau217和Aβ-PET的横截面和纵横测量,以及APOE基因型.
- 使用线性回归和线性混合效应模型来评估APOE4效应,包括与Aβ负载的相互作用,控制年龄,性别和认知状态.
主要成果:
- 在Aβ存在时,在时间元ROI中没有发现APOE4对不溶性tau (tau-PET) 的独立影响;Aβ单独预测了tau的积累.
- 在基线时,在一个队列中观察到APOE4和Aβ在内皮层tau-PET上的显著相互作用,但在队列中不一致.
- 当包括Aβ时,没有观察到APOE4对可溶性p-tau217的独立作用;Aβ负载完全调解了大多数APOE4-tau关联.
结论:
- APOE4与病理的关联似乎在很大程度上是由Aβ聚合介导的.
- Aβ病理是不溶性和溶性积的主要驱动因素,在给定的Aβ水平上,APOE4的独立贡献最小.
- 这些发现证实了Aβ在驱动阿尔茨海默病中tau病理学方面的优势.
相关概念视频
Alzheimer's Disease: Overview
439
Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
439
Amyloid Fibrils
9.2K
Amyloid fibrils are aggregates of misfolded proteins. Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils.
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
Amyloid deposits were observed as early as 1639 in the liver and the spleen. In 1854, Rudolph Virchow performed iodine staining,...
9.2K


