在整个生命周期中,遗传前叶退化的解剖学进展
Vincent Planche1,2, Boris Mansencal3, Vladimir Fonov4
1University Bordeaux, CNRS, UMR 5293, Institut des Maladies Neurodégénératives, Bordeaux F-33000, France.
Brain : a journal of neurology
|May 27, 2025
概括
大脑成像揭示了基因前叶退化 (FTLD) 突变,如C9orf72,MAPT和GRN,在一生中导致明显的脑缩模式. 了解这些时间表有助于开发未来的FTLD治疗方法.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 放射学 放射学是一门学科.
背景情况:
- 遗传前叶退化 (FTLD) 涉及复杂的神经发育和神经退化过程.
- 人类寿命的大脑图为研究终身神经退行性疾病提供了一个新的框架.
- 关键的基因突变 (C9orf72,MAPT,GRN) 与家族性FTD有关.
研究的目的:
- 在基因FTLD中模拟脑缩的终身进展,使用脑图表.
- 为了比较不同FTLD遗传突变 (C9orf72,MAPT,GRN) 中缩的发病,进展和空间范围.
- 在FTLD临床试验中确定治疗干预的最佳时间.
主要方法:
- 分析了来自对照对象的37532张MRI扫描和来自具有FTLD相关突变 (C9orf72,MAPT,GRN) 的对象的1341张MRI扫描.
- 利用人类寿命的大脑图表来绘制区域大脑体积差异的地图.
- 将解剖学变化与症状发作的平均年龄进行比较,以确定症状前阶段.
主要成果:
- 显著的大脑体积差异在C9orf72/MAPT的27岁和GRN突变载体的42岁时就被检测出来.
- 症状前阶段有所不同:13年 (MAPT),17年 (GRN) 和34年 (C9orf72).
- C9orf72 FTLD显示了最广泛的缩 (35个地区),MAPT更具侵略性和焦点性 (18个地区),GRN出现较晚但进展较快 (25个地区).
结论:
- 脑图显示了FTLD中C9orf72,MAPT和GRN突变的独特终身缩轨迹.
- C9orf72 FTLD是扩散和缓慢出现的;MAPT FTLD是积极的和焦点的;GRN FTLD是晚些时候出现的,但进展迅速.
- 这些发现对于在FTLD临床试验中定时和监测疾病修饰策略至关重要.
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