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分泌的Frizzled相关蛋白1a以剂量依赖的方式调节造血发育

Amber D Ide¹, Kelsey A Carpenter¹, Mohamed Elaswad¹

¹Department of Cell Biology, Van Andel Institute, Grand Rapids, Michigan, 49503, USA RRID: SCR_021956.

bioRxiv : the preprint server for biology

|January 20, 2025

概括

分泌的状相关蛋白1a (Sfrp1a) 关键调节斑马鱼的造血干细胞和原生细胞 (HSPC) 发育. 它的功能是剂量依赖的,影响HSPC数量和分化,对造血性癌症有影响.

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
分子信号传输的方法

背景情况:

造血干细胞和原始细胞 (HSPCs) 对于血液形成至关重要,起源于胚胎发育期间.
Wnt信号是HSPC规范,差异化和自我更新的关键调节器,需要精确的控制.
分泌的纹相关蛋白 (Sfrps) 调节Wnt信号,但它们在HSPC发育中的体内作用尚未完全理解.

研究的目的:

为了研究Sfrp1a在斑马鱼血造干细胞和原生细胞发育中的活体功能.
阐明Sfrp1a对HSPC调节和分化的剂量依赖作用.

主要方法:

利用斑马鱼模型研究Sfrp1a功能丧失和不同剂量的sfrp1a过度表达.
评估的HSPC群体,规范的Wnt信号活动和淋巴细胞/骨髓细胞分化.
在对Sfrp1a调节的反应中分析了剂量依赖的表型结果.

主要成果:

Sfrp1a功能丧失导致HSPCs增加,Wnt信号传递升高,淋巴细胞/骨髓细胞分化减少.
低剂量sfrp1a过度表达降低了HSPC和增强了淋巴细胞分化.
高剂量sfrp1a过度表达模仿功能丧失,增加HSPC和Wnt信号,同时损害分化.

结论:

在调节斑马鱼HSPC发育和分化方面,Sfrp1a起着关键的,剂量依赖的作用.
异常的Sfrp1a功能,类似于在造血癌中看到的功能,可以破坏正常的造血.
这些发现强调了精确Sfrp1a剂量的重要性,以维持造血同居状态.

关键词:

这就是Sfrp1a.他们不想做.没有信号发送.发育生物学是发展生物学.造血干细胞是造血干细胞的组成部分.斑马鱼是一种斑马鱼.

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