TDP43自我调节导致缩短的异型,这些异型受到转录和后翻译机制的严格控制
Megan M Dykstra1, Kaitlin Weskamp2, Nicolás B Gómez3,4
1Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI.
bioRxiv : the preprint server for biology
|July 15, 2024
概括
参与ALS和FTLD等神经退行性疾病的缩短TDP43 (sTDP43) 异型是由TDP43自我调节产生的,并由NMD清除. 过度表达sTDP43通过损害拼接和RNA结合导致神经退行.
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 遗传学 是一个
背景情况:
- TDP43在ALS和FTLD的发病过程中至关重要.
- N端 TDP43 异型 (sTDP43) 是细胞分裂的,容易聚合,在受影响的神经元中发现.
- 与全长TDP43 (flTDP43) 相比,sTDP43在健康细胞中的起源和调节尚不清楚.
研究的目的:
- 调查sTDP43.3的起源和监管机制.
- 了解stDP43积累在神经退行症中的后果.
- 阐明无意中介RNA衰变 (NMD) 在sTDP43调节中的作用.
主要方法:
- 对TDP43自我调节的分析.
- 在sTDP43转录清除中对无意义介导的RNA衰变 (NMD) 的研究.
- 通过体外和体外的过度表达研究评估sTDP43的毒性.
主要成果:
- sTDP43是由TDP43自我调节的副产品产生的.
- 无意中介RNA衰变 (NMD) 积极清除sTDP43编码的转录.
- 过度表达sTDP43导致通过N终端寡合化的神经退行,flTDP43剪接受损,以及RNA结合毒性.
结论:
- 内生机制严格调节sTDP43的表达.
- 异常积累的sTDP43有助于ALS和FTLD的神经退行.
- 了解sTDP43调节,可以了解疾病的发病因子.
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