FOXP3的表达取决于细胞类型特定的 cis-regulatory 元素和转录因子电路.
Jennifer M Umhoefer1, Maya M Arce1, Sivakanthan Kasinathan2
1Gladstone-UCSF Institute of Genomic Immunology, San Francisco, CA 94158, USA; Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA; Biomedical Sciences Graduate Program, University of California, San Francisco, San Francisco, CA 94143, USA.
Immunity
|November 14, 2025
概括
研究人员确定了控制T细胞中FOXP3基因表达的调控元素. 这揭示了FOXP3在调节性T细胞 (Treg细胞) 和常规T细胞 (Tconv细胞) 中跨物种的特异性调节.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- FOXP3是一种关键的转录因子 (TF),定义了调节性T细胞 (Treg细胞),对免疫抑制至关重要.
- 与小鼠不同,人类常规的CD4+T细胞 (Tconv细胞) 在刺激时可以暂时表达FOXP3,表明复杂的调节机制.
- 了解Treg和Tconv细胞之间FOXP3表达的独特调节对于免疫学研究至关重要.
研究的目的:
- 确定控制人类Treg和Tconv细胞中FOXP3表达的 cis调节元件 (CREs).
- 发现调节FOXP3表达的转作用因子 (TFs).
- 阐明控制FOXP3转录的细胞和物种特异性机制.
主要方法:
- 采用CRISPR屏幕,在人类Treg和Tconv细胞中切割FOXP3位点并准TFs.
- 对已识别的CREs进行了组合性沉默,以了解它们的表皮性关系.
- 对一种小鼠消极调节元件 (NS-CRE) 的突变发生进行了评估,以评估其功能.
主要成果:
- 发现Treg细胞CREs的一个子集,以及Tconv细胞特异的正 (NS+) 和负 (NS-) CREs,可以调节Tconv细胞中的FOXP3表达.
- 测绘了TF电路,确定了占据和控制这些CRE的关键调节器.
- 一个小鼠NS-CRE对于限制FOXP3表达仅限于Treg细胞至关重要.
结论:
- 不同的cis-regulatory元素和转作用因子以细胞和物种特定的方式控制FOXP3的表达.
- 这项研究揭示了控制FOXP3转录的复杂电路,区分了Treg和Tconv细胞中的表达模式.
- 这些发现为了解免疫调节和潜在的治疗点提供了基础.
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