RBPMS通过RNA替代拼接来调节心肌细胞收缩和心脏功能
Peiheng Gan1, Zhaoning Wang1,2, Svetlana Bezprozvannaya1
1Department of Molecular Biology, Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd., Dallas, TX 75390, USA.
Cardiovascular research
|October 27, 2023
概括
多重拼接的RNA结合蛋白 (RBPMS) 对成人心脏功能至关重要. 失去RBPMS会通过改变sarcomeric基因拼接导致严重的心脏缺陷,导致扩张性心肌病和早期死亡.
科学领域:
- 心血管生物学 心血管生物学
- 分子心脏病学分子心脏病学
- 在RNA生物学,RNA生物学.
背景情况:
- RNA结合蛋白 (RBPs) 对于心脏中转录后基因调节至关重要.
- 通过mRNA拼接,RBPMS对于心脏发育至关重要.
- 在成人心脏中RBPMS的作用仍然在很大程度上未被描述.
研究的目的:
- 研究RBPMS在产后心脏生理学中的功能.
- 阐明RBPMS调节心脏功能的分子机制.
主要方法:
- 生成一个心脏特异性的RBPMS淘汰赛小鼠模型.
- 靠近生物素识别和质谱测量以识别RBPMS相互作用体.
- RNA测序和RT-PCR用于分析基因表达和拼接.
- 微基因拼接记者测定以确定拼接规则.
- 人类诱导的多能干细胞衍生的心肌细胞测试.
主要成果:
- 心脏特异性RBPMS损失导致严重的心肌细胞收缩功能障碍,扩张性心肌病,以及过早死亡.
- RBPMS与结合体组件和其他关键心脏RBP,如RBM20.相互作用.
- RBPMS控制了sarcomeric基因 (例如,Ttn,Pdlim5,Nexn) 的替代拼接,产生新的蛋白质异型.
- RBPMS 识别了对目标基因拼接调节的协同内部 CAC 动机.
- 随着RBPMS的淘汰,人类心肌细胞的收缩受到损害.
结论:
- 在成年小鼠中,RBPMS是心肌细胞收缩和整体心脏功能的关键调节者.
- 该机制涉及RBPMS介导的瘤基因的替代拼接.
- 在产后保持心脏平衡中,RBPMS发挥着重要作用.
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