对转录动态,RNA定位和人类T细胞命运的单分子成像
M Valeria Lattanzio1,2,3, Nikolina Šoštarić1,2,3,4, Nandhini Kanagasabesan1,2,3
1Sanquin Blood Supply Foundation, Department of Research, T cell differentiation lab, Plesmanlaan 125, Amsterdam, The Netherlands.
The EMBO journal
|October 14, 2025
概括
这项研究引入了T细胞smFISH来分析T细胞中的细胞因子基因表达. 它揭示了T细胞如何通过转录和mRNA衰变调节炎症,揭示了HuRR.
科学领域:
- 免疫学和分子生物学
- 细胞和分子免疫学 细胞和分子免疫学
- 基因表达规范 基因表达规范
背景情况:
- T细胞对抗感染和癌症的免疫反应至关重要.
- 像干扰素- (IFN-γ) 和瘤坏死因子 (TNF) 这样的促炎细胞因子是T细胞的关键产物.
- 在T细胞中调节细胞因子信使RNA (mRNA) 表达,包括转录和后转录机制,尚未完全理解.
研究的目的:
- 开发和优化一种方法,同时量化新生的RNA,成熟的mRNA水平,以及人类T细胞中的mRNA局部化.
- 研究转录和转录后调节对T细胞中细胞因子mRNA表达动态的相对贡献.
- 探索RNA结合蛋白HuR在T细胞中调节细胞因子mRNA中的作用.
主要方法:
- 对原始人类T细胞 (称为T细胞smFISH) 的单分子光在位杂交 (smFISH) 的优化.
- 同时测量新生的RNA转录,成熟的mRNA丰度和单细胞水平的mRNA局部化.
- 应用T细胞smFISH分析IFNG和TNFmRNA表达和调节在激活的人类T细胞.
主要成果:
- T细胞smFISH显示了单个T细胞中细胞因子mRNA水平的显著异质性.
- 高产细胞因子的T细胞表现出IFNG和TNF基因的双转录.
- 在T细胞激活过程中,细胞核中细胞因子mRNAs的积累,随后在细胞质中发生转化依赖的衰变.
- 通过RNA结合蛋白HuR.介导的细胞因子特异调节的识别.
结论:
- T细胞smFISH是一种强大的技术,可以在单细胞分辨率下剖析T细胞中复杂的基因表达调节.
- 转录控制 (包括双列表达) 和转录后机制 (mRNA衰变) 都对调节T细胞细胞因子生产至关重要.
- RNA结合蛋白HuR在T细胞中调节细胞因子mRNA水平方面发挥着特定的作用.
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