在C. elegans中采用了正规和非正规的河马信号
Linh Huynh1, Razan A Fakieh1,2, C'Brionne Hendrix1
1College of Medicine, Texas A&M University, Houston, TX 77030, USA.
Genetics
|February 26, 2026
概括
在C. elegans中,Hippo通路核心模块 (WTS-1,YAP-1,EGL-44) 对于幼虫发育至关重要. 肠道WTS-1是至关重要的,与Hippo-dependent和-independent级联调节WTS-1在不同的组织.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 河马信号通路调节组织稳态和超生态的发育.
- 在C. elegans中,Hippo核心组件WTS-1,YAP-1和EGL-44对于幼虫发育至关重要,但该途径的直接作用尚不清楚.
- 经典的河马表型,如组织过度生长,在C. elegans中不存在.
研究的目的:
- 调查河马信号在C. elegans幼虫发育中的直接作用.
- 为了建立C. elegans作为研究河马信号动态的模型.
- 阐明Hippo相关激酶在调节YAP-1活动中的功能.
主要方法:
- 产生了光标记的内源YAP-1作为通路活动的活生物标志物.
- 利用特定组织的耗尽来评估WTS-1在不同组织中的作用.
- 分析了与Hippo相关的激酶 (CST-1,CST-2,MIG-15,GCK-2) 突变对YAP-1局部化和幼虫进展的影响.
主要成果:
- WTS-1的损失导致YAP-1在上皮和肠道中的核转位.
- 肠道WTS-1,但不是上皮WTS-1,对于超越L2幼虫阶段的进展至关重要.
- 与河马相关的激酶CST-1和CST-2抑制了YAP-1在表皮中的核定位,而肠道WTS-1则独立于CST-1/2运作.
- 对于幼虫的进化,MIG-15 显示了对 CST-1/2 的冗余性,并且影响了 YAP-1 的丰度,而没有核转移.
结论:
- C. elegans作为Hippo信号的模型,揭示了控制WTS-1的Hippo依赖和独立级联.
- 肠道WTS-1独立于CST-1/2运行,突出显示组织特异性调节.
- YAP-1/EGL-44在C. elegans的非繁殖性发育过程中发挥作用,与其规范的生长控制作用分开.
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