在临界主导的与年龄相关的TDP-43脑病变中,杏仁体和海马体积损失
Alex Wesseling1,2,3, Ismael L Calandri2,3,4, Maud M A Bouwman1,2,4
1Department of Anatomy and Neurosciences, Amsterdam UMC, 1081 HV, Amsterdam, The Netherlands.
Brain : a journal of neurology
|June 13, 2025
概括
临主导的与年龄相关的TDP-43脑病变神经病变 (LATE-NC) 与较小的杏仁体和海马体积有关. 这些发现表明,大脑区域尺寸的缩小可能成为现存个体中LATE-NC的潜在生物标志物.
科学领域:
- 神经科学是一个神经科学.
- 神经病理学神经病理学
- 放射学 放射学是一门学科.
背景情况:
- 边缘主导的与年龄相关的TAR-DNA结合蛋白 (TDP-43) 脑病变神经病理变化 (LATE-NC) 涉及TDP-43在老化大脑中的积累,通常影响杏仁体和海马体.
- LATE-NC与逐渐下降的记忆力有关,并且可以与其他神经退行性疾病 (如阿尔茨海默氏症和勒维体疾病) 一起发生.
- 目前,LATE-NC的诊断只能死后进行,这凸显了对体内生物标志物的需求.
研究的目的:
- 调查MRI测量的杏仁体和海马体能否作为LATE-NC的生物标志物.
- 评估患有阿尔茨海默病或勒维体病的人中LATE-NC病理和区域大脑体积之间的关系.
主要方法:
- 分析了51名大脑捐赠者的死后3D-T1和3T-MRI数据 (17名有LATE-NC,34名没有).
- 使用FreeSurfer软件计算了杏仁体和海马体的体积.
- 针对TDP-43,化陶,粉样β和α-synuclein的免疫组织化学检测是在脑组织上进行的.
主要成果:
- 与非LATE-NC捐赠者相比,获得LATE-NC的大脑捐赠者表现出明显较小的杏仁体 (-26%) 和海马体 (-19%) 容量.
- 即使对区域性,粉样蛋白-β和α-synuclein负担进行校正后,也观察到这些体积减少.
- 在阿尔茨海默病小组中,观察到显著的杏仁体和海马体体积差异,而在勒维体病组中,在LATE-NC中,只有杏仁体积较小.
结论:
- TDP-43负担的严重程度与杏仁体和海马体缩相关,可以通过MRI检测到.
- 在MRI上异常低的杏仁体和海马体积可能表明LATE-NC.的存在.
- 这些发现支持使用杏仁体和海马体体积作为LATE-NC. vivo生物标志物的潜力.
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