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Nature 1995 Jul 27;3766538:333-6. doi: 10.1038/376333a0.
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Regulation of neural induction by the Chd and Bmp-4 antagonistic patterning signals in Xenopus.

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 roles. The vertebrate homologue of dpp is either bmp-4 or bmp-2 (ref. 5), and the homologue os sog is chd (s-chordin). In Xenopus the CNS is induced by signals emanating from the organizer, and two proteins secreted by the organizer, noggin and follistatin, have been shown to induce neural tissue in animal-cap assays. Here we report that Chd, another organizer-specific secreted factor, 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 cap also leads to neural differentiation. We suggest that conserved molecular mechanisms involving chd/sog and bmp-4/dpp gene products pattern the ectoderm in Xenopus and in Drosophila.

PubMed ID: 7630399
Article link: Nature

Species referenced: Xenopus laevis
Genes referenced: bmp2 bmp4 chdh chrd dspp fst nog

References [+] :
Piccolo, Fearlessly tackling the organizer. 2011, Pubmed