SPI1-KLF1/LYL1轴调节了从人类多能干细胞的内皮细胞转化为血型细胞的转变过程中的血统承诺
Kengyuan Qu1,2,3, Shaokang Mo2,3, Junfeng Huang2,3
1Department of Histology and Embryology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China.
iScience
|August 7, 2024
概括
转录因子PU.1 (SPI1) 调节人体内皮细胞转化为造血细胞的转变 (EHT),影响造血细胞原生细胞 (HPC) 的生成和血统承诺. SPI1针对KLF1和LYL1,在EHT期间影响髓状和淋巴状分化.
科学领域:
- 发展生物学 发展生物学
- 血液形成 血液形成 血液形成
- 分子生物学分子生物学
背景情况:
- PU.1 (SPI1) 对于造血至关重要,但其在人体内皮细胞转化为造血细胞转化 (EHT) 中的功能尚不清楚.
- 了解EHT是产生造血干细胞 (HSC) 和理解血液发育的关键.
研究的目的:
- 研究PU.1 (SPI1) 在人体内皮质转化为血液构造转化 (EHT) 中的作用.
- 在EHT期间确定SPI1的下游目标,以及它们在血统承诺中的作用.
主要方法:
- 人体体内和体外EHT的比较转录组分析.
- 在体外EHT期间的SPI1敲击和过度表达实验.
- 多原子分析以确定SPI1目标.
主要成果:
- SPI1 knockdown 在体外减少了造血细胞原始细胞 (HPC) 的生成和分化潜力.
- KLF1和LYL1被确定为SPI1.1的直接下游目标.
- KLF1或LYL1的过度表达部分挽救了HPC形成和恢复了血统潜力 (KLF1的髓质,LYL1的淋巴质).
- 在体内观察到SPI1-LYL1调节轴的EHT.
结论:
- 在人类EHT期间,SPI1在调节血统承诺方面发挥着关键作用.
- SPI1,通过KLF1和LYL1,影响HPC的差异化潜力.
- 这些发现有助于理解造血干细胞 (HSC) 的异质性.
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