在TREM中的一个风险变体rs6922617与阿尔茨海默氏症连续体中的神经病理标志的定义有着不一致的关联
Shuangjie Qian1, Yi Zheng1, Tao Jiang1
1Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China.
概括
在TREM基因群中的单核酸多态 (SNP) rs6922617与阿尔茨海默病 (AD) 的特征,如粉样质斑块和神经退行有关. 它显示出与病理和认知表现的复杂关系,特别是在ApoE ε4载体中.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 阿尔茨海默氏症疾病研究研究
背景情况:
- 阿尔茨海默病 (AD) 是一种进展性神经退行性疾病,具有特定的神经病理特征.
- 单核酸多形态 (SNP) 正在研究它们在AD病变发生中的潜在作用.
- 在骨髓细胞 (TREM) 基因集群表达的触发受体及其变体,如SNP-rs6922617,与免疫反应有关,可能影响AD风险.
研究的目的:
- 研究TREM基因群中的SNP-rs6922617与阿尔茨海默病 (AD) 神经病理特征之间的关联.
- 检查rs6922617与认知功能 (包括记忆性能) 之间的关系.
- 探索 rs6922617 ,粉样β (Aβ) 和tau病理,神经退行和AD连续性的认知衰退之间的潜在相互作用.
主要方法:
- 横截面研究涉及660名健康对照,794名轻度认知障碍患者和272名阿尔茨海默病患者.
- 使用粉胺-PET和FDG-PET成像对神经病理特征的评估.
- 对认知表现和记忆功能的分析.
- 应用线性回归和线性混合模型来确定关联和相互作用.
主要成果:
- SNP-rs6922617与较高的全球粉样蛋白-PET负荷和较低的FDG-PET负荷有关,这表明粉样蛋白积累和神经退行症增加.
- rs6922617的风险等位基因携带者显示tau积累减少,这表明与粉样蛋白和tau病理有不一致的关联.
- 虽然单独的rs6922617与较差的认知无关,但其风险等位基因在ApoE ε4载体中加剧了神经病理表型和记忆障碍.
结论:
- 在TREM基因群中的SNP-rs6922617与阿尔茨海默病的关键神经病理特征有关,特别是粉样蛋白负担和神经退行.
- 这种变异与粉样蛋白和病理有差异性关联,在风险等位基因携带者中观察到积减少.
- 虽然与认知衰退的直接联系是不确定的,但rs6922617可能在促进AD神经病理学方面发挥作用,特别是在具有ApoE ε4基因型的个体中.
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