Wnt5b-Ryk pathway provides directional signals to regulate gastrulation movement.
Wnt5b-Ryk pathway provides directional signals to regulate gastrulation movement.
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DOI:
10.1083/jcb.200912128
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发表时间:
2010-07-26
期刊:
影响因子:
--
通讯作者:
Slusarski DC
中科院分区:
文献类型:
--
作者:
Lin S;Baye LM;Westfall TA;Slusarski DC
The soluble ligand Wnt5b repels cells expressing the Ryk (related to tyrosine kinase) receptor, establishing directional motility during gastrulation. Noncanonical Wnts are largely believed to act as permissive cues for vertebrate cell movement via Frizzled (Fz). In addition to Fz, Wnt ligands are known to regulate neurite outgrowth through an alternative receptor related to tyrosine kinase (Ryk). However, Wnt–Ryk signaling during embryogenesis is less well characterized. In this study, we report a role for Wnt5b as an instructive cue to regulate gastrulation movements through Ryk. In zebrafish, Ryk deficiency impairs Wnt5b-induced Ca2+ activity and directional cell movement. Wnt5b–Ryk signaling promotes polarized cell protrusions. Upon Wnt5b stimulation, Fz2 but not Ryk recruits Dishevelled to the cell membrane, suggesting that Fz2 and Ryk mediate separate pathways. Using co-culture assays to generate directional Wnt5b cues, we demonstrate that Ryk-expressing cells migrate away from the Wnt5b source. We conclude that full-length Ryk conveys Wnt5b signals in a directional manner during gastrulation.
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影响因子:
64.5
作者:
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通讯作者:
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DOI:
10.1073/pnas.96.25.14383
发表时间:
1999-12-07
影响因子:
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通讯作者:
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