人类翻译启动的定量分析揭示了有力调节内源性和治疗修饰mRNAs的元素
Cole J T Lewis1, Li H Xie2, Shivani Milind Bhandarkar1
1Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06510, USA.
Molecular cell
|December 20, 2024
概括
研究人员开发了一种高通量方法来测量治疗信使RNA (mRNA) 的翻译启动. 这种技术可以识别出显著提高蛋白质生产的序列,从而改善mRNA疗法和疫苗.
科学领域:
- 分子生物学分子生物学
- 生物化学 生物化学
- 遗传学 是一个遗传学.
背景情况:
- 使者RNA (mRNA) 疗法为生产治疗性蛋白质提供了一个多功能平台.
- 目前的mRNA疫苗使用改性核酸来最大限度地减少免疫反应.
- 了解翻译启动对于优化基于mRNA的疗法至关重要.
研究的目的:
- 开发一种高效,高通量方法来测量人类对修饰和内源RNA的翻译启动.
- 在5'未翻译区域 (UTR) 中识别调节翻译的序列元素.
- 评估N1-methylpseudouridine (m1Ψ) 修改对翻译效率的影响.
主要方法:
- 采用系统级生物化学来量化成千上万个人类5' UTRs中的核糖体招募.
- 分析了替代性异构和内源性RNA序列.
- 使用高通量选方法来识别监管元素.
主要成果:
- 在5' UTR中确定了特定的序列,这些序列可以在翻译启动中调解高达200倍的变化.
- 观察到编码序列对翻译启动的显著影响.
- 发现了能够强烈调节转化输出的小调节元素 (3-6个核酸).
- 证明N1-methylpseudouridine (m1Ψ) 选择性地增强特定5' UTRs的翻译,优于目前的mRNA疫苗策略.
结论:
- 开发的方法为剖析人类翻译启动机制提供了一个强大的工具.
- 确定了用于工程增强治疗mRNAs的新型监管元素.
- 这些发现表明,通过优化5' UTR序列和核酸修饰,有可能开发更有效的mRNA疗法和疫苗.
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