平面Hh信号调节再生极性,并将Hh路径进化与乳毛联系起来
Jochen C Rink1, Kyle A Gurley, Sarah A Elliott
1Department of Neurobiology and Anatomy, Howard Hughes Medical Institute, University of Utah School of Medicine, 401 MREB, 20 North 1900 East, Salt Lake City, UT 84103, USA.
概括
刺 (Hh) 信号对于平面再生和轴形成至关重要. 令人惊的是,关键的Hh通路蛋白对毛功能至关重要,而不是Hh信号本身,在平面动物中.
科学领域:
- 发展生物学 发展生物学
- 细胞信号传递 细胞信号传递
- 再生医学是一种再生医学.
背景情况:
- 刺 (Hh) 信号通路对于元动物发育,平衡和疾病至关重要.
- 在模型系统 (Drosophila,鱼类,哺乳动物) 中的Hh信号传导的变化提供了一个复杂的理解.
- 平面主义者提供了一个独特的模型来研究保存的生物路径.
研究的目的:
- 为了描述平面动物的刺 (Hh) 信号通路.
- 了解Hh信号在平面再生和轴建立中的作用.
- 为了研究平面动物中保存的Hh通路蛋白的功能.
主要方法:
- 在平面 Schmidtea mediterranea 中的 Hh 路径的描述.
- 利用RNA干扰 (RNAi) 来耗尽特定的Hh通路组件 (Cos2/Kif27/Kif7,Fused,Iguana).
- 评估了对Hh信号,Wnt表达和纤毛发育的影响.
主要成果:
- 在平面再生过程中,Hh信号对于建立前后轴至关重要,调节Wnt表达.
- 通过RNAi介导的Cos2/Kif27/Kif7,Fused或Iguana的耗尽不会导致可检测的HH信号缺陷.
- 研究人员发现,这些蛋白质对于平面纤维生殖是必不可少的.
结论:
- 这项研究扩大了对动物王国中Hh信号多样性的理解.
- 表明Hh信号与毛的功能之间存在祖先的机械联系.
- 突出了Hh通路组件在平面再生和乳毛生物学中的独特作用.
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