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  Lpp is involved in Wnt/PCP signaling and acts together with Scrib to mediate convergence and extension movements during zebrafish gastrulation

Vervenne, H. B. V. K., Crombez, K. R. M. O., Lambaerts, K., Carvalho, L., Köppen, M., Heisenberg, C.-P., et al. (2008). Lpp is involved in Wnt/PCP signaling and acts together with Scrib to mediate convergence and extension movements during zebrafish gastrulation. Developmental Biology, 320(1), 267-277.

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 Creators:
Vervenne, Hilke B V K, Author
Crombez, Koen R M O, Author
Lambaerts, Kathleen, Author
Carvalho, Lara1, Author           
Köppen, Mathias1, Author           
Heisenberg, Carl-Philipp1, Author           
Ven, Wim J M Van de, Author
Petit, Marleen M R, Author
Affiliations:
1Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society, ou_2340692              

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 Abstract: The zyxin-related LPP protein is localized at focal adhesions and cell-cell contacts and is involved in the regulation of smooth muscle cell migration. A known interaction partner of LPP in human is the tumor suppressor protein SCRIB. Knocking down scrib expression during zebrafish embryonic development results in defects of convergence and extension (C&E) movements, which occur during gastrulation and mediate elongation of the anterior-posterior body axis. Mediolateral cell polarization underlying C&E is regulated by a noncanonical Wnt signaling pathway constituting the vertebrate planar cell polarity (PCP) pathway. Here, we investigated the role of Lpp during early zebrafish development. We show that morpholino knockdown of lpp results in defects of C&E, phenocopying noncanonical Wnt signaling mutants. Time-lapse analysis associates the defective dorsal convergence movements with a reduced ability to migrate along straight paths. In addition, expression of Lpp is significantly reduced in Wnt11 morphants and in embryos overexpressing Wnt11 or a dominant-negative form of Rho kinase 2, which is a downstream effector of Wnt11, suggesting that Lpp expression is dependent on noncanonical Wnt signaling. Finally, we demonstrate that Lpp interacts with the PCP protein Scrib in zebrafish, and that Lpp and Scrib cooperate for the mediation of C&E.

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 Dates: 2008
 Publication Status: Issued
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 Identifiers: eDoc: 414420
Other: 1178
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Title: Developmental Biology
Source Genre: Journal
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Pages: - Volume / Issue: 320 (1) Sequence Number: - Start / End Page: 267 - 277 Identifier: -