YAP对于组织紧张至关重要,以确保脊椎动物的3D身体形状
Sean Porazinski1, Huijia Wang1, Yoichi Asaoka2
1Department of Biology and Biochemistry, University of Bath, Bath, BA2 7AY, UK.
一种新的梅达卡鱼突变体揭示了器官大小的关键调节器YAP如何控制组织张力和对齐,以保持3D身体形状抵御重力. 这一发现揭示了抗重力形态发生的方法.
科学领域:
- 发展生物学 发展生物学
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
背景情况:
- 脊椎动物的3D身体形状和器官功能取决于精确的组织和器官对齐.
- 协调机械形态遗传过程以产生抗重力的身体形状的机制尚不清楚.
- 河马信号传递,特别是YAP在组织力学和整体身体形状中的作用尚未完全阐明.
研究的目的:
- 调查河马信号通路效应器YAP在调节组织力学和3D身体形状方面的作用.
- 确定YAP影响组织张力和对齐的分子机制.
- 建立一个动物模型来研究重力对形态发生的影响.
主要方法:
- 生成并分析了一种梅达卡鱼 (Oryzias latipes) 突变的鱼 (hirame),表现出重力敏感性和身体平整.
- 研究了在hir胚胎中以actomyosin为媒介的组织张力和组织对齐.
- 利用人类细胞的3D球形来分析YAP功能并识别下游效应因素.
主要成果:
- 由YAP突变引起的hir突变,由于减少了由actomyosin介导的组织张力,显示了平坦的身体形状.
- 胚胎组织紧张性降低导致组织平坦和不整齐,导致整体身体平坦.
- 确定ARHGAP18作为一个YAP效应器,它调节人体细胞球体中的组织张力.
结论:
- YAP在调节组织形状和对齐方面发挥着至关重要的,以前未被认可的作用,这对于适当的3D脊椎动物身体形状至关重要.
- 在控制组织张力方面,YAP的功能对于保持身体完整性来抵御重力至关重要.
- 了解YAP的形态遗传作用可以促进从干细胞生成复杂的器官,需要精确的组织对齐.
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