一个Cfap298的保存域控制着左-右对称性断裂在脊椎动物中
Marvin Cortez1,2, Cullen B Young1,2, Katherine A Little1
1Department of Molecular Biology, Princeton University.
bioRxiv : the preprint server for biology
|June 4, 2025
概括
在CFAP298基因中,一种新的小鼠突变通过损害乳毛运动能力来破坏左右身体模式,证实了它在哺乳动物发育和乳毛病症中的重要作用.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- CFAP298基因对纤毛细胞的运动性和肌蛋白臂组合至关重要,在左右 (LR) 模式中发挥作用,并与人类纤毛病相关.
- 哺乳动物的LR不对称性是由节点的向左流动液体流动所建立的,由具有平面细胞极性的移动驱动.
研究的目的:
- 为了研究一种新的CFAP298突变等位基因 (Cfap298Δ3aa) 在哺乳动物LR轴建立中的功能.
- 确定CFAP298在胚胎发育过程中的毛功能中的特定作用.
主要方法:
- 产生并表征了一种新的小鼠突变等位基因,Cfap298Δ3aa.
- 分析胚胎发育,包括器官定位和基因表达 (Nodal,Pitx2,Lefty1).
- 评估了突变胚胎和斑马鱼的毛结构,位置,平面细胞极性和运动性.
主要成果:
- 由于心脏,肺和胃的位置异常,Cfap298Δ3aa突变胚胎表现出各种横向缺陷 (孤独位置,反向,模糊) .
- 观察到LR对称性破坏的早期破坏,并改变了Nodal,Pitx2和Lefty1的表达.
- 节点和气管中的突变毛显示出运动能力受损,没有改变位置或长度,表明运动性缺陷.
- 这种Cfap298Δ3aa变体未能在斑马鱼中挽救LR缺陷,突出了保留的功能域.
结论:
- CFAP298对于哺乳动物LR轴形成至关重要,主要是通过其在毛细胞运动中的作用.
- 这种Cfap298Δ3aa等位基因揭示了CFAP298蛋白质的一个新的,保存的区域,该区域对纤毛功能至关重要.
- 这项研究加深了对纤毛病和胚胎不对称性背后的分子机制的理解.
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