Filopodia formation mediated by receptor tyrosine kinase Ror2 is required for Wnt5a-induced cell migration.

Filopodia formation mediated by receptor tyrosine kinase Ror2 is required for Wnt5a-induced cell migration.
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DOI:
10.1083/jcb.200607127
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发表时间:
2006-11-20
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Minami Y
Minami Y
中科院分区:
其他
文献类型:
--
作者:
Nishita M;Yoo SK;Nomachi A;Kani S;Sougawa N;Ohta Y;Takada S;Kikuchi A;Minami Y

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受体酪氨酸激酶Ror 2在发育形态发生中起重要作用。最近的研究表明,Ror 2通过激活Wnt-JNK通路和抑制β-catenin-TCF通路介导Wnt 5a诱导的非经典Wnt信号传导。然而,Ror 2在导致细胞迁移的非经典Wnt信号传导中的功能在很大程度上是未知的。我们表明,使用遗传上不同的或操纵的培养细胞,Ror 2是Wnt 5a诱导的,但不是Wnt 3a诱导的细胞迁移的关键。Ror 2介导的细胞迁移需要细胞外富含半胱氨酸的结构域(CRD),这是Wnt 5a的结合位点,和Ror 2的细胞质富含脯氨酸的结构域(PRD)。此外,Ror 2可以通过肌动蛋白重组介导丝状伪足的形成,与Wnt 5a无关,并且这种Ror 2介导的丝状伪足的形成需要肌动蛋白结合蛋白细丝蛋白A,其与Ror 2的PRD相关。有趣的是,通过抑制Ror 2或细丝蛋白A的表达来破坏丝状伪足形成抑制了Wnt 5a诱导的细胞迁移,表明Ror 2介导的丝状伪足形成对于Wnt 5a诱导的细胞迁移是必不可少的。
The receptor tyrosine kinase Ror2 plays important roles in developmental morphogenesis. It has recently been shown that Ror2 mediates Wnt5a-induced noncanonical Wnt signaling by activating the Wnt–JNK pathway and inhibiting the β-catenin–TCF pathway. However, the function of Ror2 in noncanonical Wnt signaling leading to cell migration is largely unknown. We show, using genetically different or manipulated cultured cells, that Ror2 is critical for Wnt5a-induced, but not Wnt3a-induced, cell migration. Ror2-mediated cell migration requires the extracellular cysteine-rich domain (CRD), which is the binding site for Wnt5a, and the cytoplasmic proline-rich domain (PRD) of Ror2. Furthermore, Ror2 can mediate filopodia formation via actin reorganization, irrespective of Wnt5a, and this Ror2-mediated filopodia formation requires the actin-binding protein filamin A, which associates with the PRD of Ror2. Intriguingly, disruption of filopodia formation by suppressing the expression of either Ror2 or filamin A inhibits Wnt5a-induced cell migration, indicating that Ror2-mediated filopodia formation is essential for Wnt5a-induced cell migration.
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