TDP-43功能障碍导致密码可转移元素衍生的外原体 (crypTEs) 在iPSC衍生的神经元和ALS/FTD患者组织中积累
bioRxiv : the preprint server for biology
|January 16, 2026
概括
TDP-43蛋白质功能障碍导致神经元中的神秘基因-TE融合,扩大已知的RNA处理错误. 这些新的转录与ALS和认知衰退有关,揭示了疾病的新机制.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- TDP-43蛋白对于RNA处理至关重要,其功能障碍导致了神秘拼接异型.
- 可移植元素 (TE) 是可移动的遗传元素,通常在体细胞中沉默.
- TE失调与神经系统疾病有关.
研究的目的:
- 在TDP-43中列出错误拼接和错误表达的基因和TEs在耗尽的人类神经元中.
- 为了识别新的TDP-43依赖的密码基因-TE融合转录 (crypTEs).
- 调查 crypTEs 在肌缩侧面硬化症 (ALS) 发病过程中的作用.
主要方法:
- 优化长读RNA测序 (Iso-seq) 用于分析TDP-43耗尽的神经元.
- 单核RNA测序 (snRNA-seq) 应用于死后的ALS组织.
- 进行了生物信息分析,以识别和表征神秘拼接异型和基因-TE融合.
主要成果:
- 确定了数百个TDP-43依赖的crypTEs,包括作为替代促进体,外子或3'端的TEs.
- 这些crypTEs预计会导致异常基因表达,NMD产物和新.
- 在ALS捐赠者与认知参与 (ALSci) 的前额皮质样本中丰富了CrypTEs.
结论:
- 依赖TDP-43的crypTE代表了一个新型的密码拼接异型的类别.
- 通过crypTE形成的TE失调是影响ALS的一种新发现的机制.
- CrypTEs可能有助于ALS的发病,特别是在认知障碍的情况下.
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