需要Wnt共受体Arrow-LRP5/6才能在Drosophila中建立平面细胞极性
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Updated: Jan 6, 2026

11:14
Modeling Paracrine Noncanonical Wnt Signaling In Vitro
Published on: December 10, 2021
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bioRxiv : the preprint server for biology
|October 3, 2025
概括
箭头 (Arr) /LRP5/6对于Wnt/平面细胞极性 (PCP) 信号传输至关重要,与当前的模型相反. 失去Arr会导致PCP缺陷,这表明它在发育和组织平衡中起着至关重要的作用.
科学领域:
- 分子生物学分子生物学
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
背景情况:
- 包括Wnt/β-catenin和Wnt/平面细胞极性 (PCP) 在内的Wnt信号通路对于发育,组织维护和疾病发病至关重要.
- LRP5/6,在Drosophila中被称为Arrow (Arr),是Wnt/β-catenin信号传递的既定共受体,介导信号体复合体的形成.
研究的目的:
- 调查Arr/LRP5/6在Wnt/PCP信号传递中的作用,挑战它与这些共同受体独立运作的普遍观念.
- 阐明Arr/LRP5/6影响PCP建立和功能的分子机制.
主要方法:
- 对缺乏arr基因以评估PCP相关表型的Drosophila突变的分析.
- 在arr突变组织中检查细胞命运,极性和蛋白质定位.
- 功能相互作用研究以确定Frizzled (Fz) 和Dishevelled (Dsh) 如何与Arr相互作用.
主要成果:
- 在Drosophila中,arr的丧失导致显著的PCP缺陷,包括异常的细胞方向,翅膀毛发的形成和极性丧失.
- 不同突变组织在眼睛中表现出特征性的PCP表型,例如R3/R4光受体细胞命运变化和奇拉性缺陷.
- 在Wnt/PCP建立中的缺陷与Frizzled (Fz),Flamingo/Celsr (Fmi) 和Dishevelled (Dsh) 的降低水平和失去了不对称的局部化相关.
结论:
- 与现有模型相反,对于Wnt/PCP信号,Arr/LRP5/6是积极要求的.
- Arr/LRP5/6 增强了 Wnt/Fz-Dsh 综合体在 PCP 信号传递中在各种组织中的功能.
- 这些发现揭示了Arr/LRP5/6在促进Wnt/PCP通路活性方面发挥的重要作用.
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