TCF1 和 LEF1 促进 B-1a 细胞平衡和调节功能
Qian Shen1, Hao Wang2, Jonathan A Roco2,3
1Francis Crick Institute, London, UK. qian.shen@crick.ac.uk.
Nature
|August 20, 2025
概括
转录因子TCF1和LEF1对于B-1a细胞的调节至关重要,维护它们的干细胞性质和免疫功能. 这些因子的丧失会损害B-1a细胞的维持和调节能力,影响炎症控制.
科学领域:
- 免疫学
- 细胞生物学
- 分子生物学
背景情况:
- B-1 细胞,特别是 CD5+ B-1a 亚组,是具有免疫调节功能的与生俱来的免疫细胞,表达像IL-10这样的抗炎分子.
- 与传统的B细胞不同,B-1a细胞在生命早期建立并自我更新,但它们的精确调节仍然不完全理解.
研究的目的:
- 研究转录因子TCF1和LEF1在B-1a细胞的调节和功能中的作用.
- 阐明TCF1和LEF1控制B-1a干细胞的分子机制和调节性质.
主要方法:
- 对来自小鼠的 B-1 原细胞和成熟 B-1 细胞的 TCF1 和 LEF1 表达的分析.
- 产生和分析TCF1-LEF1双缺小小鼠以评估B-1a细胞群和功能.
- 研究TCF1和LEF1缺乏对B-1细胞代谢,干细胞和IL-10产生的影响.
- 在脑炎症模型中评估TCF1/LEF1缺乏B-1细胞的免疫调节能力的采用转移实验.
主要成果:
- TCF1和LEF1是B-1a细胞发育和维护的关键调节者,在原生细胞和成熟细胞中具有不同的表达模式.
- TCF1-LEF1缺乏导致B-1a细胞数量减少,自我更新受损,IL-10和PDL1的表达有缺陷.
- 这些转录因子促进MYC依赖的代谢途径,并在激活的B-1a细胞中诱导类似干细胞的表型.
- 缺少TCF1和LEF1的B-1细胞表现出过度的增殖,一个枯竭的表型,并且无法抑制实验性脑炎症.
结论:
- 一个由TCF1-LEF1驱动的转录程序对于整合B-1a细胞的干细胞和调节功能至关重要.
- 这些发现突显了TCF1和LEF1在维护B-1a细胞平衡及其免疫调节潜力的重要性.
- 该研究确定TCF1和LEF1是B-1a细胞生物学中的关键参与者,对了解免疫调节和慢性淋巴细胞白血病等疾病有影响.
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