在DDX1甲基化中介的MATR3拼接中,通过启动色素重编程来调节椎间盘退化
Dingchao Zhu1, Huaizhen Liang1, Bide Tong1
1Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Nature communications
|July 3, 2025
概括
椎间盘退化 (IVDD) 导致腰部疼痛与通过EZH2.2的DDX1甲基化有关. 抑制EZH2或恢复MATR3-L表达可以治疗IVDD.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 再生医学是一种再生医学.
背景情况:
- 腰部疼痛 (LBP) 是一个重要的公共卫生问题,通常是由椎间盘退化 (IVDD) 引起的.
- 对于RNA结合蛋白DDX1在IVDD病原发生中的作用尚不清楚.
- 了解IVDD背后的分子机制对于开发有效的治疗方法至关重要.
研究的目的:
- 研究DDX1在椎间盘退化 (IVDD) 中的作用.
- 确定控制细胞核中DDX1功能的调节机制.
- 探索针对已识别的分子通路的潜在治疗策略.
主要方法:
- 确定DDX1是甲基转移酶EZH2.2的基质.
- 在体外和体内研究,以评估EZH2抑制对IVDD的影响.
- 对DDX1甲基化对RNA拼接的影响的分析,特别是MATR3外形14跳转.
- 对核架构,色素可访问性和Wnt信号的下游影响的调查.
- 在体内测试基于mRNA的疗法,使用化脂纳米颗粒来输送MATR3-L.
主要成果:
- EZH2在素234 (K234) 中甲基化DDX1,促进IVDD的进展.
- 抑制EZH2可以改善NP细胞中的矩阵稳态,并减缓IVDD.
- DDX1 K234甲基化破坏了与拼接因子的相互作用,导致MATR3外子14跳转.
- 截断的MATR3改变了核结构,增加了染色质的可访问性,并激活了Wnt信号,导致NP细胞衰老和亡.
- 通过纳米颗粒传递MATR3-LmRNA可以减少NP细胞退化并缓解IVDD.
结论:
- DDX1,由K234处的EZH2甲基化,是IVDD的关键驱动因素.
- 针对EZH2或恢复MATR3-L表达是IVDD的一个有前途的治疗途径.
- 这项研究阐明了IVDD发病的新型分子机制,并提供了潜在的治疗策略.
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