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          Institute: MPI für molekulare Zellbiologie und Genetik     Collection: Publikationen mpi-cbg 2003     Display Documents

ID: 190421.0, MPI für molekulare Zellbiologie und Genetik / Publikationen mpi-cbg 2003
Slb/Wnt11 controls hypoblast cell migration and morphogenesis at the onset of zebrafish gastrulation.
Authors:Ulrich, Florian; Concha, Miguel L.; Heid, Paul J.; Voss, Ed; Witzel, Sabine; Roehl, Henry; Tada, Masazumi; Wilson, Stephen W.; Adams, Richard J.; Soll, David R.; Heisenberg, Carl-Philipp
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Development
Issue / Number:22
Start Page:5375
End Page:5384
Copyright:not available
Review Status:not specified
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:During vertebrate gastrulation, highly coordinated cellular rearrangements lead to the formation of the three germ layers, ectoderm, mesoderm and endoderm. In zebrafish, silberblick (slb)/wnt11 regulates normal gastrulation movements by activating a signalling pathway similar to the Frizzled-signalling pathway, which establishes epithelial planar cell polarity (PCP) in Drosophila. However, the cellular mechanisms by which slb/wnt11 functions during zebrafish gastrulation are still unclear. Using high-resolution two-photon confocal imaging followed by computer-assisted reconstruction and motion analysis, we have analysed the movement and morphology of individual cells in three dimensions during the course of gastrulation. We show that in slb-mutant embryos, hypoblast cells within the forming germ ring have slower, less directed migratory movements at the onset of gastrulation. These aberrant cell movements are accompanied by defects in the orientation of cellular processes along the individual movement directions of these cells. We conclude that slb/wnt11-mediated orientation of cellular processes plays a role in facilitating and stabilising movements of hypoblast cells in the germ ring, thereby pointing at a novel function of the slb/wnt11 signalling pathway for the regulation of migratory cell movements at early stages of gastrulation.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für molekulare Zellbiologie und Genetik
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