Antagonistic regulation of convergent extension movements in Xenopus by Wnt/beta-catenin and Wnt/Ca2+ signaling
2001 | journal article. A publication with affiliation to the University of Göttingen.
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Antagonistic regulation of convergent extension movements in Xenopus by Wnt/beta-catenin and Wnt/Ca2+ signaling
Kuhl, M.; Geis, K.; Sheldahl, L. C.; Pukrop, T.; Moon, R. T. & Wedlich, D. (2001)
Mechanisms of Development, 106(1-2) pp. 61-76. DOI: https://doi.org/10.1016/S0925-4773(01)00416-6
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- Authors
- Kuhl, M.; Geis, K.; Sheldahl, L. C.; Pukrop, Tobias; Moon, R. T.; Wedlich, D.
- Abstract
- Convergent extension movements are the main driving force of Xenopus gastrulation. A fine-tuned regulation of cadherin-mediated cell-cell adhesion is thought to be required for this process. Members of the Wnt family of extracellular glycoproteins have been shown to modulate cadherin-mediated cell-cell adhesion, convergent extension movements, and cell differentiation. Here we show that endogenous Wnt/beta -catenin signaling activity is essential for convergent extension movements due to its effect on gene expression rather than on cadherins. Our data also suggest that XLEF-1 rather than XTCF-3 is required for convergent extension movements and that XLEF-1 functions in this context in the Wnt/beta -catenin pathway to regulate Xnr-3. In contrast, activation of the Wnt/Ca2+, pathway blocks convergent extension movements, with potential regulation of the Wnt/beta -catenin pathway at two different levels. PKC, activated by the Wnt/Ca2+ pathway, blocks the Wnt/beta -catenin pathway upstream of beta -catenin and phosphorylates Dishevelled. CamKII, also activated by the Wnt/Ca2+ pathway, inhibits the Wnt/beta -catenin signaling cascade downstream of beta -catenin. Thus, an opposing cross-talk of two distinct Wnt signaling cascades regulates convergent extension movements in Xenopus. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.
- Issue Date
- 2001
- Status
- published
- Publisher
- Elsevier Science Bv
- Journal
- Mechanisms of Development
- ISSN
- 0925-4773