子的最佳性调节细胞应激和由外源RNAs触发的先天免疫反应
bioRxiv : the preprint server for biology
|December 9, 2024
概括
优化信使RNA (mRNA) 序列可以增强蛋白质的产生,减少细胞应激和免疫反应. 结合序列,化学和结构修改可以提高治疗潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- COVID-19 mRNA疫苗的成功凸显了mRNA疗法的潜力.
- 有限的数据存在于同义使用如何影响细胞压力和天生的免疫力.
- 了解这些因素对于设计有效的基于mRNA的疗法至关重要.
研究的目的:
- 研究同名编码子优化对mRNA可翻译性,细胞压力和先天免疫反应的影响.
- 探索RNA修饰 (核酸修饰,循环化) 如何影响这些结果.
- 为改善治疗应用提供对工程mRNA序列的见解.
主要方法:
- 开发了一种专有编码子最佳性矩阵,用于重新设计 luciferase 记者 mRNA 序列.
- 通过使用双 luciferase 试验,评估了各种细胞系中的 luciferase 活性.
- 分析了先天免疫路径激活和综合应激反应标记 (例如,eIF2α酸化).
- 研究了核酸修饰和RNA循环化的效应.
主要成果:
- 与非最佳序列相比,优化设计的mRNA显示出显著更高的露西法酶活性.
- 非最佳的mRNA触发了先天免疫路径和综合应激反应.
- 核酸修饰和循环化部分或完全取消了这些不良反应.
- 循环RNA形成增强了RNA稳定性和蛋白质表达耐用性.
结论:
- RNA序列,组成和结构是翻译性和免疫性的关键决定因素.
- 在mRNA中低于最佳的密码子使用可以诱导细胞应激和免疫激活.
- 为了在mRNA医学中获得有利的治疗结果,需要采用包括序列优化,化学修饰和拓工程在内的综合方法.
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