内皮衍生,分泌的长非编码RNAsGadlor1和Gadlor2加剧心脏重塑
Merve Keles1,2,3, Steve Grein1,3, Natali Froese4
1ECAS (European Center for Angioscience), Department of Cardiovascular Physiology, Medical Faculty Mannheim of Heidelberg University, 68167 Mannheim, Germany.
Molecular therapy. Nucleic acids
|September 16, 2024
概括
两个长非编码RNAs,Gadlor1和Gadlor2,通过破坏内皮细胞-心肌细胞通信来恶化心力衰竭. 它们的去除可以改善一些心脏功能,但矛盾的是,会增加突然死亡的风险,这表明它们在心脏重塑中起着复杂的作用.
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
- 非编码RNA研究研究
背景情况:
- 病态心脏重塑是心力衰竭发展的关键因素.
- 长非编码RNAs (lncRNAs) 越来越多地被认为在心血管疾病中的作用.
- 了解新的分子通路对于开发有效的心力衰竭疗法至关重要.
研究的目的:
- 调查两个协同调节的lncRNAs,Gadlor1和Gadlor2在心脏重塑和心力衰竭中的作用.
- 阐明心脏中涉及Gadlor1和Gadlor2的作用机制和细胞间通信.
- 探索针对心力衰竭中的Gadlor1和Gadlor2的治疗潜力.
主要方法:
- 在失败的人类和小鼠心脏中分析Gadlor1和Gadlor2表达.
- 在压力过载下生成和表征Gadlor1/2淘汰赛小鼠.
- 通过细胞外囊泡 (EVs) 进行gadlor lncRNA分泌及其转移到心肌细胞的研究.
- 评估分子信号通路,包括卡尔莫杜林依赖的激酶II激活.
主要成果:
- 在失败的心脏中,Gadlor1和Gadlor2的调节升高,在压力过载下加剧心脏功能障碍,高和纤维化.
- 加德洛1/2淘汰赛小鼠表现出心脏改造减少和血管生成改善,但在长时间的压力下面面临突然死亡的风险增加.
- 加德洛1和加德洛2由EV中的内皮细胞 (ECs) 分泌,并转移到心肌细胞,在那里它们通过calmodulin依赖性激酶II调节基因表达和平衡.
结论:
- 加德洛1和加德洛2在EC-心肌细胞交声中起着关键作用,有助于心力衰竭中的病态心脏重塑.
- 向Gadlor lncRNAs为心力衰竭提供了潜在的治疗策略,但需要仔细考虑非向效应,如心律失常.
- 这项研究揭示了心力衰竭的发病过程中的 lncRNA 中介细胞间通信轴.
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