正常和ALS C9orf72运动神经元成熟期间染色体和核结构的动态变化
Özgün Uyan1, Snehal Sambare2, Marlies E Oomen2
1Department of Neurology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
bioRxiv : the preprint server for biology
|October 3, 2025
概括
神经成熟涉及基因表达和染色体组织的重大变化. 这些过程在患者的运动神经元中受损C9orf72相关的肌缩侧面硬化症 (ALS).
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- C9orf72基因的六核酸重复扩张是肌缩性侧面硬化症 (ALS) 的主要遗传原因.
- 运动神经元的分化和成熟涉及细胞组织和基因表达的复杂变化.
- 了解这些变化对于阐明ALS病原体至关重要.
研究的目的:
- 在运动神经元分化和成熟过程中调查染色体构造,核组织和转录的变化.
- 为了比较控制和C9orf72-突变运动神经元中的这些过程.
- 识别导致ALS的潜在缺陷.
主要方法:
- 使用了体外重编程,分化和神经成熟协议.
- 从纤维细胞中产生高度净化的后转移性运动神经元群体.
- 分析了染色质可访问性,染色体构造,核组织和转录组.
主要成果:
- 运动神经元的成熟包括在前三周内发生广泛的转录组变化,随后是相对稳定.
- 染色体构造和核组织在六周的成熟过程中不断演变,具有明显的地域性,相互作用和聚类变化.
- C9orf72-突变运动神经元表现出染色体构造的减少变化和延迟的染色体可访问性成熟,尽管转录组成熟相对正常,脂质,固醇和线粒体基因表达改变.
结论:
- 神经成熟的特点是基因表达,染色体构造和核组织的大规模,转移后的变化.
- 这些基本的成熟过程在来自ALS患者的运动神经元中是有缺陷的,这些患者的C9orf72六核酸重复扩张.
- 核组织和染色体构造的缺陷可能会导致C9orf72相关的ALS.病原体.
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