Journal
EMBO REPORTS
Volume 4, Issue 8, Pages 761-765Publisher
WILEY
DOI: 10.1038/sj.embor.embor896
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The secreted protein sonic hedgehog (Shh) is crucial for the specification of neuronal subtype identity in the vertebrate neural tube. Zinc-finger proteins of the Gli family are known to be transcriptional mediators of Shh signalling, and to coordinately pattern the dorsal - ventral axis of the spinal cord. Recent studies indicate that additional signals may provide positional information in parallel to Shh to specify neuronal fate in this tissue. We review the role of Gli proteins in spinal-cord development and propose that various upstream patterning signals may be integrated by the Gli proteins to direct a coherent programme of neurogenesis.
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