The abnormal apoptosis of cardiomyocyte is the main cause of many cardiac diseases that finally lead to heart failure. The detailed molecular mechanism of this process remains largely unknown. It has recently been reported that miRNA and lncRNA play a key role in cardiomyocyte apoptosis. We found that lncRNA inhibits anoxia-induced mitochondrial fission and cardiomyocyte apoptosis.miR-361 induces cardiomyocyte apoptosis and mitochondrial fission. On the basis of these studies we set the following research contents: ① To study the role of miR-361 in vitro and in vivo; ② To test whether miR-361 and lncRNA interact with each other directly in vivo; ③ To explore the role of lncRNA in mitochondrial fission and cardiomyocyte apoptosis. Our project aims at figuring out a signaling pathway that composed of miRNA and lncRNA. This study not only has a great theoretical importance, but also explores a new way for prevention and therapeutics of heart failure.
心肌细胞的异常凋亡能导致许多心脏疾病及最终导致心衰的发生,但是其分子机理到现在还未被人们完全了解。最近已有文献报道miRNA和lncRNA在心肌细胞凋亡过程中起到了关键的调控作用,从而为这项研究引入了新的内容。我们已有的数据表明,lncRNA能抑制缺氧诱导的线粒体分裂及心肌细胞凋亡;miR-361能诱导心肌细胞线粒体分裂及心肌凋亡;此项目拟探究lncRNA和miR-361相互作用调节心肌凋亡的分子机理。研究内容包括:① 在细胞和整体水平上进一步探究 miR-361在心肌凋亡中的作用;② 探究miR-361和lncRNA能否在体内直接相互作用;③ 进一步探究lncRNA在线粒体分裂和心肌凋亡中的作用。预期目标是寻找由miRNA和lncRNA调控线粒体分裂和心肌凋亡的新途径。此项研究对于丰富和完善心脏分子和细胞生物学具有重要的理论意义,同时为探究心肌凋亡及心衰的预防和治疗开辟一个新的方向。
我国的心血管疾病死亡率一直居高不下,在我国居民主要疾病死亡构成比中,心血管疾病占居首位,超过肿瘤及其他疾病,是我国疾病患者的第一大致死原因。在本项目研究中我们系统研究了miR-361 和该lncRNA 在心肌细胞线粒体分裂和心肌细胞凋亡及心肌梗死中的作用,也在整体动物水平研究该lncRNA 和miR-361 在心肌缺血损伤中的作用。揭示了miR-361在心脏疾病中的作用机制,发现了由miR-361\PHB1组成的信号通路以及lncRNA MDRL、miR-361、miR-484组成的信号通路。在完成该研究的基础上,我们也进一步研究了心脏疾病其他的信号通路,并对其作用机理、相关信号通路进行了深入研究。较好的达到了研究目标,并超额完成了研究任务。
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数据更新时间:2023-05-31
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