Ectodermal Wnt Function as a Neural Crest Inducer

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Science  02 Aug 2002:
Vol. 297, Issue 5582, pp. 848-851
DOI: 10.1126/science.1070824

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Neural crest cells, which generate peripheral nervous system and facial skeleton, arise at the neural plate/ectodermal border via an inductive interaction between these tissues. Wnts and bone morphogenetic proteins (BMPs) play roles in neural crest induction in amphibians and zebrafish. Here, we show that, in avians, Wnt6 is localized in ectoderm and in vivo inhibition of Wnt signaling perturbs neural crest formation. Furthermore, Wnts induce neural crest from naı̈ve neural plates in vitro in a defined medium without added factors, whereas BMPs require additives. Our data suggest that Wnt molecules are necessary and sufficient to induce neural crest cells in avian embryos.

  • * To whom correspondence should be addressed. E-mail: mig1000{at}

  • Present address: Developmental Biology Institute, LGPD. Campus de Luminy, case 907 University of Aix-Marseille II, 13288 Marseille Cedex 09, France.

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