The Drosophila selectin furrowed mediates intercellular planar cell polarity interactions via frizzled stabilization.

The Drosophila selectin furrowed mediates intercellular planar cell polarity interactions via frizzled stabilization.
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DOI:
10.1016/j.devcel.2013.07.006
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发表时间:
2013-09-16
期刊:
影响因子:
11.8
通讯作者:
Mlodzik, Marek
Mlodzik, Marek
中科院分区:
生物学1区
文献类型:
--
作者:
Chin, Mei-Ling;Mlodzik, Marek

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组织中平面细胞极性(PCP)的建立需要细胞间定向信号的协调。这被认为是由核心PCP因子介导的,其中包括细胞粘附分子。在这里,我们证明了果蝇选择素是PCP生成所必需的。在有沟缺陷的果蝇中,PCP的破坏是由Fz水平和细胞粘附的主要缺陷引起的。沟槽定位于/接近顶端连接处,大部分与卷曲和火烈鸟(Fmi)共定位。它在物理上与Frizzled相互作用并使其稳定,此外,它介导细胞间的Frizzled- van Gogh (Vang)/斜视相互作用,类似于Fmi。在脊椎动物血细胞/内皮细胞相互作用中,我们描述了其已知的碳水化合物结合功能。重要的是,碳水化合物功能对于PCP的建立是必不可少的。体内研究表明,furwed与Fmi部分冗余作用,介导相邻细胞之间的细胞间frzzledvang相互作用。
Establishment of planar cell polarity (PCP) in a tissue requires coordination of directional signals from cell to cell. It is thought that this is mediated by the core PCP factors, which include cell adhesion molecules. Here, we demonstrate that furrowed, the Drosophila Selectin, is required for PCP generation. Disruption of PCP in furrowed-deficient flies results from a primary defect in Fz levels and cell adhesion. Furrowed localizes at/near apical junctions, largely co-localizing with Frizzled and Flamingo (Fmi). It physically interacts with and stabilizes Frizzled, and further, it mediates intercellular Frizzled-Van Gogh (Vang)/Strabismus interactions, similarly to Fmi. Furrowed does so through a homophilic cell adhesion role that is distinct from its known carbohydrate-binding function described during vertebrate blood-cell/endothelial cell interactions. Importantly, the carbohydrate function is dispensable for PCP establishment. In vivo studies suggest that Furrowed functions partially redundantly with Fmi, mediating intercellular Frizzled-Vang interactions between neighboring cells.
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