ZFIN ID: ZDB-PUB-000309-23
Zebrafish wnt4b expression in the floor plate is altered in sonic hedgehog and gli-2 mutants
Liu, A., Majumdar, A., Schauerte, H.E., Haffter, P., and Drummond, I.A.
Date: 2000
Source: Mechanisms of Development   91(1-2): 409-413 (Journal)
Registered Authors: Drummond, Iain, Haffter, Pascal, Majumdar, Arindam, Schauerte, Heike
Keywords: floor plate; neural tube; cell fate; signals; sonic hedgehog; gli-2
MeSH Terms:
  • Amino Acid Sequence
  • Animals
  • Gene Expression Regulation, Developmental*
  • Hedgehog Proteins
  • Molecular Sequence Data
  • Mutation
  • Oncogene Proteins/genetics*
  • Proteins/genetics*
  • Proto-Oncogene Proteins/genetics*
  • Sequence Homology, Amino Acid
  • Trans-Activators*
  • Transcription Factors/genetics*
  • Wnt Proteins
  • Wnt4 Protein
  • Zebrafish/embryology
  • Zebrafish/genetics*
PubMed: 10704875 Full text @ Mech. Dev.
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ABSTRACT
The floor plate of the neural tube serves an important function as a source of signals that pattern cell fates in the nervous system as well as directing proper axon pathfinding. We have cloned a novel zebrafish wnt family member, wnt4b, which is expressed exclusively in the floor plate. To place wnt4b in the context of known regulators of midline development, its expression was analyzed in the zebrafish mutants cyclops (cyc), floating head (flh), you-too (yot), and sonic you (syu). wnt4b expression in the medial and lateral floor plate are shown to be regulated independently: medial floor plate expression occurs in the absence of a notochord, while lateral floor plate expression requires a functional notochord, sonic hedgehog and gli-2.
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