Abstract
The Wnt family of secreted signalling molecules control a wide range of developmental processes in all metazoans. The intracellular response to Wnt signalling depends on the choice of signalling cascade activated in the responding cell. Cells can activate either the canonical pathway that modulates gene expression to control cellular differentiation and proliferation, or the non-canonical pathway that controls cell polarity and movement. Recent work has identified the protein Naked Cuticle to act as an intracellular switch to promote the non-canonical pathway at the expense of the canonical pathway. We have cloned chick Naked Cuticle-1 (cNkd-1) and show that it is expressed in a dynamic manner during early embryogenesis. We show that it is expressed in the somites and in particular regions where cells are undergoing movement. Lastly, we show that the expression of cNkd-1 is regulated by Wnt expression originating from the neural tube. This study provides evidence that non-canonical Wnt signalling plays a part in somite development.
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Acknowledgements
We thank the Biotechnology and Biological Sciences Research Council (BBS/S/A/2004/11020), the Deutsche Forschungsgemeinschaft (DFG, Shcm 1643/2-1) and Wellcome Trust (077750) who generously provided funds enabling this work to be undertaken. We are also indebted to two anonymous referees who made suggestions that greatly improved this paper.
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Schmidt, C., Otto, A., Luke, G. et al. Expression and regulation of Nkd-1, an intracellular component of Wnt signalling pathway in the chick embryo. Anat Embryol 211, 525–534 (2006). https://doi.org/10.1007/s00429-006-0102-4
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DOI: https://doi.org/10.1007/s00429-006-0102-4