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Regulation of neural induction by the Chd and Bmp-4 antagonistic patterning signals in Xenopus

A Correction to this article was published on 01 November 1995

A Correction to this article was published on 26 October 1995

This article has been updated

Abstract

IN Drosophila the amount of neurogenic ectoderm, from which the central nervous system (CNS) derives, is regulated by a dorsal-ventral system of positional information in which two secreted molecules of antagonistic functions, decapentaplegic (dpp) and short-gastrulation (sog), play fundamental roles1-4. The vertebrate homologue of dpp is either bmp-4 or bmp-2 (ref. 5), and the homologue of sog is chd 4,6,7 (s-chordin). In Xenopus the CNS is induced by signals emanating from the organizer8, and two proteins secreted by the organizer, noggin9 and follistatin10, have been shown to induce neural tissue in animal-cap assays. Here we report that Chd, another organizer-specific secreted factor6, has neuralizing activity and that this activity can be antagonized by Bmp-4. Inhibition of the function of the endogenous Bmp-4 present in the animal cap11 also leads to neural differentiation. We suggest that conserved molecular mechanisms involving chd/sog and bmp-4/fdpp gene products pattern the ectoderm in Xenopus and in Drosophila.

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Sasai, Y., Lu, B., Steinbeisser, H. et al. Regulation of neural induction by the Chd and Bmp-4 antagonistic patterning signals in Xenopus. Nature 376, 333–336 (1995). https://doi.org/10.1038/376333a0

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