突变载体的结构和功能连接性:从前兆到症状的前性痴呆症
Arabella Bouzigues1,2, Vincent Le Du1, Matthieu Joulot1
1Paris Brain Institute, Sorbonne Université, INSERM U1127, Hôpital Pitié-Salpêtrière, Paris, France.
概括
在MAPT突变载体中,早期的功能性大脑变化先于结构损伤,表明前性痴呆症 (FTD) 的潜在生物标志物. 这些连接性改变随着疾病阶段的进展而进展,为神经退行提供了洞察力.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 神经学 神经学
背景情况:
- 微管相关蛋白 (MAPT) 突变是前性痴呆症 (FTD) 的遗传原因.
- FTD的特点是由于大脑连接受损而导致的行为,语言和运动障碍.
- 了解连接变化的进展对于FTD研究至关重要.
研究的目的:
- 调查不同疾病阶段的MAPT突变携带者的结构和功能大脑连接变化.
- 将连接性改变的进展从无症状到FTD的症状阶段进行映射.
- 为了确定与MAPT相关的神经退行症的潜在早期生物标志物.
主要方法:
- 利用CDR痴呆症分期仪器以及国家阿尔茨海默氏症协调中心 (NACC) 行为和语言领域来分层载体.
- 在86个突变载体和272个对照中评估了皮层厚度,白质完整性和功能连接性.
- 采用线性混合模型来比较运营商组和控制之间的连接措施.
主要成果:
- 无症状携带者表现出突出/视觉网络的早期功能障碍,以及前带膜灰质的减少.
- 产体载体表现出扩展的功能变化和额外的结构损伤在极和带状皮层.
- 在疾病各个阶段观察到功能性和结构性连接性改变的渐进模式.
结论:
- 功能网络中断似乎驱动终身补偿,当结构损伤达到关键值时,临床症状会出现.
- 连接措施,特别是早期的功能变化,显示出与MAPT相关的神经退行相关的生物标志物.
- 研究结果支持一种模型,在这种模型中,沿着连接的tau传播先于可测量的缩,突出了神经退行症的顺序性质.
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