活体CRISPR查揭示了支持CD8+T细胞命运的营养信号传递过程
Hongling Huang1, Peipei Zhou1, Jun Wei1
1Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
Cell
|February 26, 2021
概括
像Slc7a1和Slc38a2这样的营养载体调节记忆T细胞 (TMEM) 的分化. Pofut1将营养信号与T细胞命运联系在一起,影响T细胞效应 (TEFF) 和TMEM发育.
科学领域:
- 免疫学
- 细胞生物学
- 代谢信号
背景情况:
- 了解效应T细胞 (TEFF) 中的早期事件如何影响记忆T细胞 (TMEM) 的反应至关重要.
- 代谢因素在T细胞命运决定中起着重要作用,但它们对TEFF和TMEM发育的确切影响需要进一步调查.
研究的目的:
- 系统地研究代谢因子,特别是氨基酸载体和营养信号通路在调节TEFF和TMEM细胞命运中的作用.
- 确定抑制TMEM反应的关键调节者,并了解它们的作用机制.
主要方法:
- 使用体内聚合的CRISPR查来识别TMEM反应的代谢调节者.
- 综合基因和系统方法分析TEFF群体内的细胞和代谢异质性.
- 研究了Pofut1在将营养物质可用性 (GDP-fucose) 与Notch-Rbpj信号的功能.
主要成果:
- 氨基酸载体Slc7a1和Slc38a2被确定为TMEM分化的负调节剂,部分通过调节mTORC1信号.
- 在TEFF细胞中的终端效应区分与代谢静止和细胞周期退出有关.
- Pofut1介导的营养信号轴的干扰阻断了终端效应体的分化,但促进了TEFF的扩散和TMEM的发展.
结论:
- 营养吸收和信号通路是T细胞命运决定的关键因素.
- 这些代谢过程显著影响记忆T细胞反应的数量和质量,为免疫调节提供了潜在的点.
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