多个Wnt信号通路在再生的斑马鱼脏中直接连接上皮管
bioRxiv : the preprint server for biology
|April 8, 2025
概括
在再生过程中,Wnt信号调节管融合. 规范性和非规范性Wnt通路,包括Wnt4,Wnt9b和Frizzled9b,对于适当的管管相互连接和脏发育至关重要.
科学领域:
- 发展生物学 发展生物学
- 脏生理学 脏生理学
- 细胞信号传递 细胞信号传递
背景情况:
- 表皮管融合对于脏的发育和功能至关重要.
- 成年斑马鱼的脏提供了一个模型,用于研究伤害后再生期间的神经发育和管管相互连接.
研究的目的:
- 研究斑马鱼再生过程中管管互连中的正规和非正规Wnt信号通路的作用.
- 阐明表皮管融合背后的分子机制.
主要方法:
- 利用斑马鱼模型在Wnt路径组件 (wnt4, frizzled9b) 中发生突变.
- 使用药理抑制剂 (IWR1) 来阻止正规的Wnt信号传输.
- 使用显微镜和遗传分析分析了细胞形态,信号通路 (Src 激酶,rac1,Rho 激酶) 和管状体的形成.
主要成果:
- 涉及Wnt4和Wnt9b的正规Wnt信号传递促进了介质细胞表型和管相互连接所需的基底突起.
- 在Wnt4中发生突变或对正规Wnt信号的抑制会破坏基底突起的形成.
- 由Frizzled9b介导的非正规Wnt通路限制了正规Wnt信号传输,驱动顶峰收缩,并为正交光线连接定位基底突起.
- 的9b突变体表现出神经元与远端管道的互连失败.
结论:
- 规范性和非规范性Wnt信号通路在相同的细胞内相互作用,以调节和定向斑马鱼再生中的管管相互连接.
- 这些发现突显了Wnt信号在形态发生和再生中的复杂相互作用.
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