线粒体基因组编码 lncND5 调节低氧性肺动脉平滑肌肉细胞中的线粒细胞衰变
June Bai1,2, Siyu He1,2, Xiaoying Wang1,3
1Central Laboratory of Harbin Medical University (Daqing), Daqing, P. R. China.
概括
长非编码RNA ND5 (lncND5) 通过调节线粒细胞衰变来减轻肺高血压. 这种线粒体lncRNA维持了复杂I活性,减少了线粒体的活性氧物种,并抑制了线粒体,为PH提供了潜在的治疗标.
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:
- 肺高血压 (PH) 涉及复杂的分子机制,包括髓.
- 长非编码RNAs (lncRNAs) 涉及PH,但它们在线粒中的作用尚不清楚.
- 线粒体lncRNAs在线粒体中的功能需要阐明.
研究的目的:
- 研究 mitochondrial lncRNA ND5 (lncND5) 在PH病原发生中的作用.
- 阐明IncND5调节线粒细胞衰变的分子机制.
- 评估IncND5作为PH的潜在治疗点.
主要方法:
- 实时定量PCR (RT-qPCR) 和光在位杂交 (FISH) 用于IncND5表达和定位.
- 在机械学研究中使用西式涂抹,流细胞计,RNA免疫沉,RNA拉下,传输电子显微镜 (TEM) 和免疫光 (IF).
- 苏根5416加上缺氧 (SuHx) 诱导的PH小鼠模型和人类肺动脉光滑肌细胞 (PASMCs),用于体外和体内验证.
主要成果:
- 线粒体lncND5表达在人类PASMCs的低氧下降.
- lncND5与线粒体中的MT-ND5结合,保持复合I活性,减少线粒体ROS,并减轻线粒体.
- lncND5还通过与HMGCS1相互作用,通过TDP-43.3介导的运输来抑制细胞质中的线粒细胞衰变.
结论:
- lncND5在调节肺动脉平滑肌肉细胞中的线粒方面发挥着至关重要的作用.
- lncND5的双重线粒体和细胞质功能可以防止缺氧诱导的线粒体功能障碍和线粒体衰变.
- lncND5代表了肺高血压的新型治疗点.
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