Abstract
Early in differentiation, all neural cells have a rostral character. Only later do posteriorly positioned neural cells acquire characteristics of caudal forebrain, midbrain and hindbrain cells. Caudalization of neural tissue in the chick embryo apparently involves the convergent actions of (i) fibroblast growth factor (FGF) signaling and (ii) signaling from the caudal paraxial mesoderm, or 'PMC activity', which has not yet been defined molecularly. Here we report evidence that Wnt signaling underlies PMC activity, and show that Wnt signals act directly and in a graded manner on anterior neural cells to induce their progressive differentiation into caudal forebrain, midbrain and hindbrain cells.
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Change history
11 June 2002
Linked asterisk added to the phrase "rostral-to-caudal shift" -- the footnote reads: The authors wish to correct the phrase "rostral-to-caudal shift," which should read "rostrocaudal shift." An erratum will be published in the July issue.
Notes
NOTE: The authors wish to correct the phrase "rostral-to-caudal shift," which should read "rostrocaudal shift."
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Acknowledgements
We thank Y. Renoncourt for experimental contributions, members of the Edlund lab for discussions and H. Alstermark for technical assistance. We are grateful to R. Nusse for providing Wnt3A-expressing cells, to J. Nathans for the mFrzCRD-IgG plasmid and Xwnt8 cell line and to C. Tabin for Wnt probes. T.E. is supported by the Swedish Medical Research Council and by the Foundation for Strategic Research. T.M.J. is supported by grants from US National Institute of Neurological Disorders and Stroke (NIH-NINDS) and is an Investigator of the Howard Hughes Medical Institute.
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Nordström, U., Jessell, T. & Edlund, T. Progressive induction of caudal neural character by graded Wnt signaling. Nat Neurosci 5, 525–532 (2002). https://doi.org/10.1038/nn0602-854
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DOI: https://doi.org/10.1038/nn0602-854
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