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通过质子传感TRIM25进行外源RNA监测

Myeonghwan Kim^1,2, Youngjoon Pyo^1,2, Seong-In Hyun¹

¹Center for RNA Research, Institute for Basic Science, Seoul, Korea.

Science (New York, N.Y.)

|April 3, 2025

概括

细胞机械有助于外源传递 RNA (mRNA),但也可以抑制它们. 这项研究确定TRIM25是mRNA周转的关键抑制剂,揭示了改善RNA治疗的途径.

科学领域:

分子生物学
免疫学
生物技术

背景情况:

外源信使RNA (mRNA) 对于治疗至关重要,但面临细胞障碍和调节机制.
了解控制外传mRNA命运的细胞通路对于优化它们的有效性至关重要.

研究的目的:

综合地绘制调节脂质纳米粒子 (LNP) 传递的细胞通路.
确定涉及mRNA吸收,内体逃生和降解的关键因素.
阐明RNA结合蛋白和mRNA调节和免疫反应中的修饰作用.

主要方法:

使用LNP封装的体外转录mRNA进行全基因组CRISPR选.
研究了肝素硫酸蛋白糖 (HSPG) 和真空腺三酶 (V-ATPase) 在LNP输送中的作用.
描述了TRIM25,N4BP1,KHNYN和ZAP在mRNA监测和循环中的功能.

主要成果:

肝酸硫酸蛋白质 (HSPG) 调解LNP吸收,而V-ATPase则促进内体逃逸.
TRIM25是一种RNA结合的E3泛素联酶,作为线性和循环的mRNA周转的主要抑制剂.
使用TRIM25的监测包括冗余的内啡核酶 (N4BP1, KHNYN) 和抗病毒蛋白ZAP.
TRIM25的活性由酸性内体pH增强,并特别向内体递送的mRNA.
在mRNA中N1- 甲基伪尿素的修饰减少了TRIM25的结合,促进了细胞抑制的逃避.

结论:

这项研究提供了调节LNP递送mRNA的细胞通路的全面地图.
确定TRIM25是mRNA稳定的关键调节剂,其活性由内体环境和mRNA修饰调节.
这些发现为RNA免疫提供了关键的见解,并为开发更有效的mRNA疗法提供了基础.

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