阿林信号传递作为内皮细胞和造血干细胞命运之间的分子开关
Jean Eberlein1, Nadja Groos1, Navina Shrestha Duwal1
1Department of Biology, Animal Cell Biology, Marburg University, Marburg, Germany.
EMBO reports
|December 16, 2025
概括
阿佩林信号作为一个分子开关,平衡血管和造血细胞的命运. 这一发现揭示了内皮细胞 (ECs) 中的阿佩林受体 (Aplnr) 表达如何保持动脉身份,调节血造干细胞和原生细胞 (HSPC) 的形成.
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
- 细胞命运的决定
背景情况:
- 造血干细胞和原始细胞 (HSPCs) 通过内皮细胞转化为造血干细胞 (EHT) 从动脉内皮细胞 (ECs) 生成.
- 尽管有广泛的诱导信号,但控制背上大动脉 (DA) 中选择性EHT的分子机制仍然不清楚.
- 了解这种选择性命运决定对于再生医学和发育研究至关重要.
研究的目的:
- 在DA中识别控制细胞命运决定的分子调节器.
- 阐明阿佩林信号在平衡内皮和造血细胞身份中的作用.
- 调查阿佩林受体 (Aplnr) 表达如何影响ETH和HSPC形成.
主要方法:
- 在DA内皮细胞中分析基因表达模式.
- 对阿佩林信号元件的功能丧失和功能获取研究.
- 在体内成像和细胞跟踪以监测EHT动态.
主要成果:
- 表达阿林受体 (Aplnr) 的EC保持动脉的同一性.
- 非表达ECs的Aplnr是为血源性内皮细胞 (HEC) 差异化和HSPC生成做准备的.
- 阿佩林信号的丧失导致EC-HEC转换的增加和HSPC数量的增加.
- 强制Aplnr表达通过保持EC身份来抑制HSPC的形成.
结论:
- 阿佩林信号作为一个关键的分子开关,调节DA中的细胞命运.
- 阿佩林信号保护内皮的身份,从而控制HSPC的形成.
- 这些发现为平衡血管和造血发育的机制提供了新的见解.
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