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Updated: Jul 15, 2025

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调节mRNA翻译的二次结构为ASO介导的心脏缩调节提供了洞察力
Omar M Hedaya1,2, Kadiam C Venkata Subbaiah1, Feng Jiang1,2
1Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry, Rochester, NY, 14642, USA.
Nature communications
|October 3, 2023
概括
在GATA4上游开放阅读框架 (uORFs) 中,一种新的双链RNA (dsRNA) 结构控制了翻译. 用反感性寡核化物 (ASOs) 准这种dRNA会改变蛋白质水平和细胞功能,提供一种新的治疗策略.
科学领域:
- 分子生物学分子生物学
- 在RNA生物学,RNA生物学.
- 基因规则 基因规则
背景情况:
- 上游开放阅读框架 (uORF) 的翻译通常会抑制主开放阅读框架 (mORF) 的翻译.
- 控制细胞中由uORF介导的转化控制的精确分子机制在很大程度上仍未被阐明.
- 了解这些机制对于破译基因表达调节至关重要.
研究的目的:
- 为了研究心脏细胞中uORF调节的分子机制.
- 用RNA结构来确定调节mRNA翻译的新策略.
- 探索针对uORF翻译的治疗潜力.
主要方法:
- 人类和小鼠心脏组织的核糖体分析分析.
- 在uORF中识别和描述双链RNA (dsRNA) 结构.
- 反感性寡核酸 (ASO) 设计和应用以调节RNA结构.
- 在人心肌细胞和小鼠模型中进行体外和体内验证.
主要成果:
- 在GATA4 uORF中确定了一个dsRNA结构,增强uORF翻译并抑制mORF翻译.
- 发现RNA螺旋酶DDX3X可以抑制GATA4的uORF-dsRNA活性.
- 针对dsRNA结构的ASO调节了uORF和mORF的翻译平衡.
- 增强uORF的ASO治疗降低了心脏GATA4蛋白,并增加了对心肌细胞缩的耐药性,在体外和体内.
- 证明ASO介导的dSRNA向对调节其他mRNA翻译具有广泛的实用性.
结论:
- uORF-dsRNA元素代表了跨多个mRNA的翻译控制的通用化机制.
- 准或生成dSRNA在起始编码子的下游提供了一种多功能策略来改变蛋白质表达和细胞表型.
- 这项研究为开发通过操纵翻译控制来开发新型治疗干预提供了有价值的框架.
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