转录因子TCF-1的内在失序域对于T细胞发育忠实性是必需的
Naomi Goldman1,2,3, Aditi Chandra1,2,3, Isabelle Johnson1,2,3
1Department of Genetics, University of Pennsylvania, Philadelphia, Philadelphia, PA, USA.
Nature immunology
|August 17, 2023
概括
先驱因子TCF-1的本质上混乱的L1区域对于T细胞发育至关重要. 它的缺失导致发育障碍和血统不忠,突出了它在维持T细胞身份方面的作用.
科学领域:
- 发育生物学是发展生物学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 先驱转录因子通过访问静音染色体来启动血统特定的基因表达.
- 内在无序区域 (IDRs) 在先驱因子功能和细胞命运决定中的作用仍然在很大程度上未被探索.
- TCF-1是T细胞发育中的关键先驱因素.
研究的目的:
- 调查先驱因子TCF-1中的内在无序区域L1的功能.
- 确定L1删除对T细胞发育和血统忠实性的影响.
- 阐明L1影响基因表达和细胞命运的分子机制.
主要方法:
- 在CRISPR-Cas9基因编辑中删除TCF-1的L1区域.
- 流细胞计和谱系追踪以评估T细胞发育和识别发育阻碍.
- 定量PCR和ChIP-seq用于分析基因表达特征和TCF-1结合标.
主要成果:
- 删除TCF-1 L1区域导致T细胞原始体的早期发育阻断.
- 从L1-删除的TCF-1表达原始体中发展的T细胞显示出血统不忠,偏离了正常的T细胞发育.
- L1对于激活T细胞特异性基因和抑制来自其他基因系的基因至关重要,例如GATA2驱动的基因.
- 在L1中介的TCF-1结合早期的目标基因对于T细胞谱系的承诺至关重要.
结论:
- TCF-1本质上有障碍的L1区域对于正常的T细胞发育和保持血统忠实是不可或缺的.
- L1通过调节TCF-1对其关键目标基因的可访问性来发挥作用,从而控制谱系特定的基因程序.
- 这些发现揭示了先驱因子中的IDR如何在发育过程中对细胞命运决定作出贡献的新机制.
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