Cited by 337Developmental Biology and Gene RegulationWnt/β-catenin signaling in development and cancerCellular Mechanics and Interactions

Zebrafish Rho Kinase 2 Acts Downstream of Wnt11 to Mediate Cell Polarity and Effective Convergence and Extension Movements

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Marlow, Florence, Topczewski, Jacek, Sepich, Diane, Solnica-Krezel, Lilianna·2002·Current Biology

Abstract

Background During vertebrate gastrulation convergence and extension (CE), movements narrow and lengthen embryonic tissues. In Xenopus and zebrafish, a noncanonical Wnt signaling pathway constitutes the vertebrate counterpart to the Drosophila planar cell polarity pathway and regulates mediolateral cell polarization underlying CE. Despite the identification of several signaling molecules required for normal CE, the downstream transducers regulating individual cell behaviors driving CE are only beginning to be elucidated. Moreover, how defective mediolateral cell polarity impacts CE is not understood.Results Here, we show that overexpression of zebrafish dominant-negative Rho kinase 2 (dnRok2) disrupts CE without altering cell fates, phenocopying noncanonical Wnt signaling mutants. Moreover, Rho kinase 2 (Rok2) overexpression partially suppresses the slb/wnt11 gastrulation phenotype, and ectopic expression of noncanonical Wnts modulates Rok2 intracellular distribution. In addition, time-lapse analyses associate defective dorsal convergence movements with impaired cell elongation, mediolateral orientation, and consequently failure to migrate along straight paths. Transplantation experiments reveal that dnRok2 cells in wild-type hosts neither elongate nor orient their axes. In contrast, wild-type cells are able to elongate their cell bodies in dnRok2 hosts, even though they fail to orient their axes.Conclusions During zebrafish gastrulation, Rok2 acts downstream of noncanonical Wnt11 signaling to mediate mediolateral cell elongation required for dorsal cell movement along straight paths. Furthermore, elongation and orientation of the cell body are independent properties that require both cell-autonomous and nonautonomous Rok2 function.

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Crossref · 10.1016/s0960-9822(02)00864-3

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  • Activation of Rho GTPase leads to the activation of the Rho-associated kinase (ROCK) and myosin, which leads to modification of the actin cytoskeleton and cytoskeletal rearrangement.

    “Activation of Rho GTPase leads to the activation of the Rho-associated kinase (ROCK)82 and myosin,83 which leads to modification of the actin cytoskeleton and cytoskeletal rearrangement.”

    From Wnt signal transduction pathways (2008) · cites this paper as [82]

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Authors
Marlow, F., Topczewski, J., Sepich, D., & Solnica-Krezel, L.
Affiliations
Vanderbilt University (US)
Venue
Current Biology
Publisher
Elsevier BV
Published
2002-06
Volume
12
Issue
11
Pages
876-884
ISSN
0960-9822 (ISSN-L)
OpenAlex
W1964743891
Cited by
337
References
43
Citations by year
2026: 2 · 2025: 4 · 2024: 1 · 2023: 6 · 2022: 10 · 2021: 14 · 2020: 7 · 2019: 7 · 2018: 6 · 2017: 12 · 2016: 11 · 2015: 15 · 2014: 12 · 2013: 12 · 2012: 14
FWCI
8.13
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (T32HL007751, T32-HL07751)
  • National Institute of General Medical Sciences (GM55101, R01GM055101)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular Mechanics and Interactions
Keywords
Wnt11, non-canonical Wnt signaling, convergence and extension, gastrulation, cell polarity, cell migration, planar cell polarity, zebrafish embryos
MeSH terms
Animals, Base Sequence, Embryo, Nonmammalian, Glycoproteins, Oligonucleotides, Zebrafish, Signal Transduction, Cell Polarity, Protein Serine-Threonine Kinases, Cell Lineage, Xenopus Proteins, Zebrafish Proteins, Embryonic Development, Intracellular Signaling Peptides and Proteins, Wnt Proteins, rho-Associated Kinases

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