RNA/DNA结合蛋白TDP43调节DNA不匹配修复基因,对基因组稳定性有影响
Vincent E Provasek1,2, Albino Bacolla3, Suganya Rangaswamy1
1Division of DNA Repair Research, Center for Neuroregeneration, Department of Neurosurgery, Houston Methodist Research Institute, Houston, TX 77030, United States.
Nucleic acids research
|September 23, 2025
概括
TDP43蛋白质病变影响神经退行性疾病如ALS中的DNA修复基因表达. 这项研究揭示了TDP43调节DNA不匹配修复,影响神经元健康和癌症发展.
科学领域:
- 分子生物学分子生物学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- TDP43蛋白质病变是ALS和FTD的一个关键特征.
- 异常的TDP43导致神经元中的DNA双链断裂.
研究的目的:
- 调查TDP43和DNA不匹配修复 (MMR) 基因表达之间的联系.
- 确定TDP43在神经退行性和瘤病理中的作用.
主要方法:
- 评估了MMR基因表达 (MLH1,MSH2,MSH3,MSH6,PMS2) 作为对TDP43变化的反应.
- 分析了TDP43对替代拼接和转录稳定性的影响.
- 在ALS小鼠模型和患者组织中检查了TDP43和MMR.
- 利用TCGA癌症数据的生物信息学分析.
主要成果:
- TDP43的枯竭/过度表达改变了MMR基因表达.
- TDP43选择性地影响了MLH1和MSH6的拼接和稳定性.
- 异常的MMR基因表达与ALS模型和患者的TDP43蛋白质病变相关.
- MMR的消耗部分挽救了TDP43诱导的DNA损伤.
- TDP43和MMR基因表达与癌症中的突变负担有关.
结论:
- TDP43是DNA不匹配修复途径的新型调节者.
- TDP43影响神经退行和癌症病理.
- 针对TDP43-MMR相互作用可能提供治疗途径.
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