由C9orf72中六核酸重复扩张引起的肌性侧面硬化症:从遗传学到治疗学
Sarah Mizielinska1, Guillaume M Hautbergue2, Tania F Gendron3
1UK Dementia Research Institute at King's College London, London, UK; Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
The Lancet. Neurology
|February 22, 2025
概括
在C9orf72中GGGCC重复扩张是肌缩侧面硬化症和前性痴呆症的常见原因. 这些扩张触发了复杂的病理机制,需要新的治疗策略,而不仅仅是针对单一的功能获取途径.
科学领域:
- 神经遗传学 神经遗传学
- 分子神经学分子神经学
背景情况:
- 在C9orf72基因中GGGCC重复扩张是欧洲血统个体中肌缩侧面硬化症 (ALS) 和前性痴呆症 (FTD) 的主要遗传驱动因素.
- 在突变透率,发病年龄和临床表现方面存在显著的变异性,使诊断和预后复杂化.
- 重复扩张导致双向转录,产生重复RNA和二重复蛋白质,这些蛋白质在大脑和脊髓中积累.
研究的目的:
- 阐明C9orf72重复扩张相关的神经退行性疾病背后的复杂病理机制.
- 审查当前治疗方法的局限性,并突出新兴策略.
主要方法:
- 对C9orf72重复扩张,它们的分子病理学和临床影响的现有文献的审查.
- 对神经病理发现的分析,包括TDP-43聚合物.
- 对针对重复RNA的临床试验结果的评估.
主要成果:
- GGGGCC重复扩展会导致功能丧失和功能增益效应.
- 在受影响的大脑区域和脊髓中观察到的重复性RNA和二蛋白质的积累.
- 神经病理学特征包括化TDP-43聚合物.
- 以前针对单个功能获取机制的反感性寡核酸试验取得了有限的成功.
结论:
- C9orf72重复扩张呈现出致病机制的复杂相互作用.
- 针对DNA重复,多个RNA物种或TDP-43功能障碍的新型治疗策略正在开发中.
- 发展诊断和预后生物标志物对于改善患者管理至关重要.
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