一个由RBPMS驱动的拼接调节轴,包括MBNL1,RBFOX2和QK,促进光滑肌肉细胞收缩性身份
Yuling Huang1, Rafael Kollyfas2, Ruth Partridge1
1Department of Biochemistry, University of Cambridge, Cambridge, CB2 1QW, United Kingdom.
Nucleic acids research
|December 22, 2025
概括
与心血管疾病相关的血管光滑肌细胞 (SMC) 表型切换是由RNA结合蛋白 (RBPs) 调节的. RBPMS充当主调节器,协调其他RBP来控制SMC功能和表型.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 心血管研究研究心血管研究
背景情况:
- 血管光滑肌细胞 (SMC) 表型在收缩和增殖状态之间切换是心血管疾病的标志.
- 由RNA结合蛋白 (RBPs) 调节的替代拼接 (AS) 程序是这些表型变化的关键驱动因素.
- 具有多重剪接的RNA结合蛋白 (RBPMS) 之前被确定为差异化SMC中的AS的主调节者.
研究的目的:
- 调查MBNL1,RBFOX2和QK作为RBPMS在SMCAS和表型中的共同调节者的作用.
- 了解这些RBPs如何集体维护收缩性SMC表型.
主要方法:
- 研究了RBPMS,MBNL1,RBFOX2和QK在SMC中的功能.
- 利用敲击实验来评估每个RBP对SMC表型和AS的影响.
- 分析了结合事件,以丰富与行为丝和焦点粘附相关的功能.
主要成果:
- 四个RBPs (RBPMS,MBNL1,RBFOX2,QK) 都普遍促进了收缩性SMC拼接,其中RBPMS显示出最强的对齐.
- 相关调节的拼接事件与行为丝和焦点粘附有关,这表明收缩机械的协调重塑.
- 单独对RBPMS的淘汰诱导了表型切换的各个方面 (减少收缩,增加增殖和运动性),而对其他RBP的单独淘汰则产生了不同的效果.
结论:
- RBPMS充当主调节器,指导其他RBP控制SMC表型切换,独立于转录程序.
- 这种RBP网络对于维持SMC收缩功能和预防与疾病相关的表型转变至关重要.
- 这些发现揭示了RBPs在推动基本细胞表型变化的协调调节轴.
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