N1-methylpseudouridine mRNA修饰通过防止Prkra介导的全球翻译抑制来提高基因过度表达的效率和特异性
Tong Lu1, Aijun Chen1, Changjin Li1
1Shandong Provincial Key Laboratory of Animal Cell and Developmental Biology, School of Life Sciences, and Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao 266237, China.
Nucleic acids research
|October 16, 2025
概括
在体外转录的信使RNA (IVT mRNA) 中的双链RNA (dsRNA) 副产品会损害斑马鱼胚胎. 对IVTmRNA的N1-methylpseudouridine (m1Ψ) 修改通过减少dsRNA传感器结合来防止这些有害影响.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 免疫学 免疫学 免疫学
背景情况:
- 在体外转录的信使RNA (IVT mRNA) 对治疗和研究至关重要.
- IVT mRNA过程可以产生双链RNA (dsRNA) 的副产品.
- 这些dSRNA副产品通过dSRNA传感器触发天生的免疫反应.
研究的目的:
- 分析dsRNA副产品对早期斑马鱼胚胎的负面影响.
- 调查Prkra (干扰素诱导蛋白激酶的蛋白激活剂) 在dsrna诱导的毒性中的作用.
- 为了评估N1-methylpseudouridine (m1Ψ) 修改对减轻这些影响的有效性.
主要方法:
- 对dsrna副产品对斑马鱼胚胎的影响的全面分析.
- 研究涉及Prkra.的dsRNA诱导毒性的机制.
- 评估m1Ψ修饰的dsRNAs与Prkra二次体的结合亲和力.
主要成果:
- 在斑马鱼胚胎中,dsRNA的副产品会导致细胞亡,并延迟母细胞转化 (MZT).
- 这种毒性是由dsrna传感器prkra调解的,这降低了全球翻译效率.
- N1-methylpseudouridine (m1Ψ) 修改显著降低了dSRNA与Prkra的结合,减轻了不良影响.
- m1Ψ修饰还通过一种独特的机制,在多能细胞中最大限度地减少dSRNA诱导的应激反应.
结论:
- dsRNA副产品在早期胚胎中对IVT mRNA应用构成重大挑战.
- m1Ψ修改提供了一个强大的解决方案来提高IVTmRNA的保真性和安全性.
- 了解dSRNA,Prkra和m1Ψ修饰之间的相互作用可以提高mRNA技术的发展.
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