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Modulation of neural commitment by changes in target cell contacts in Pleurodeles waltl
J P Saint-Jeannet1, S Huang, A M Duprat
1Centre de Biologie du Développement, URA CNRS 675, Université Paul Sabatier, Toulouse, France.
Developmental Biology
|September 1, 1990
Summary
Amphibian ectoderm can form neural cells without natural inducers. Cell-cell contacts are crucial, as breaking them triggers neural induction, while reaggregation reduces this response.
Area of Science:
- Developmental biology
- Neuroscience
- Cell biology
Background:
- Neural structures in amphibians develop from ectoderm via chordamesoderm induction during gastrulation.
- Early gastrula ectoderm can undergo neuralization when dissociated into single cells.
Purpose of the Study:
- To investigate neural cell fate specification in Pleurodeles waltl presumptive ectoderm.
- To determine the role of cell-cell contacts in neural induction.
Main Methods:
- Dissociation of Pleurodeles waltl presumptive ectoderm into single cells.
- Observation of neural induction in dissociated and reaggregated ectoderm cells.
Main Results:
- Neuronal and glial lineages can be specified from presumptive ectoderm without natural inducing tissue.
- Rupturing cell-cell contacts induced neuralization, but immediate reaggregation reduced this response.
Conclusions:
- Presumptive ectoderm possesses intrinsic neural potential, independent of natural inducers.
- Cell-cell contacts play an active role in modulating neural commitment during amphibian development.