两种微生物组代谢物竞争tRNA修饰以影响哺乳动物细胞增殖和翻译质量控制
Wen Zhang1, Kuldeep Lahry2, Denis Cipurko3
1Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL, USA.
Nature cell biology
|September 16, 2025
概括
微生物代谢物pre-queuosine 1 (preQ1) 抑制了人类和小鼠细胞的增殖. 自然化合物queuine可以抵消preQ1的作用.
科学领域:
- 微生物学和分子生物学
- 单核细胞生物学 单核细胞生物学
- 代谢学 代谢学 代谢学
背景情况:
- 微生物群通过各种代谢物,包括对tRNA修饰至关重要的queuine影响宿主细胞.
- 细菌代谢物pre-queuosine 1 (preQ1),是tRNAqueuosine生物合成的前体,对宿主细胞生物学有未知的影响.
研究的目的:
- 研究微生物代谢物pre-queuosine 1 (preQ1) 对真核细胞宿主细胞增殖的影响.
- 阐明preQ1影响宿主细胞的机制及其潜在的治疗应用.
主要方法:
- 在实验室中评估了preQ1对人类和小鼠细胞增殖的影响.
- 研究了preQ1和tRNA修改队列之间的竞争性相互作用.
- 在小鼠的血和组织中检测到preQ1,并在小鼠癌症模型中评估其对瘤生长的影响.
- 确定了因诺醇需要酶1 (IRE1) 核糖酶在前Q1介导的tRNA降解中的作用.
主要成果:
- 前奎素1 (preQ1) 在人类和小鼠细胞中显著抑制细胞增殖.
- 队列通过修改相同的tRNA来竞争性地逆转preQ1的抑制作用.
- PreQ1存在于小鼠的血和组织中,并在体内抑制瘤生长.
- 特别地,PreQ1降低了相关的tRNA水平,并影响了家政基因的代码子依赖转化.
- 细胞内膜网膜局部化的IRE1核核糖酶调解了preQ1-修饰的tRNAs的选择性降解.
结论:
- 两个微生物代谢物,preQ1和queuine,竞争宿主tRNA的修饰,影响翻译质量控制.
- 这场比赛影响了真核细胞的增殖,并提出了针对微生物群与宿主相互作用的潜在治疗策略.
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