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Related Experiment Videos

Early neurogenesis.

D A Hartley1

  • 1Department of Biochemistry, Imperial College of Science, Technology and Medicine, London, UK.

Seminars in Cell Biology
|June 1, 1990
PubMed
Summary
This summary is machine-generated.

Early embryo development involves cell sorting between neural and epidermal precursors. Gene functions, involving cell surface and DNA-binding proteins, regulate central nervous system (CNS) formation.

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Area of Science:

  • Developmental biology
  • Cell biology
  • Genetics

Background:

  • Early embryonic development involves precise cell fate decisions.
  • Morphogenetic movements disrupt embryonic symmetry, initiating differentiation.
  • Neural precursors (neuroblasts) and epidermal precursors arise from the ectoderm.

Purpose of the Study:

  • To investigate the genetic mechanisms governing cell sorting between neural and epidermal precursors.
  • To understand the molecular basis of central nervous system (CNS) size regulation.
  • To identify genes involved in cell-cell interactions during early neurogenesis.

Main Methods:

  • Analysis of gene mutants affecting CNS development.
  • Molecular cloning of key regulatory genes.

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  • Homology searches to classify gene products.

    • Main Results:

    • Two sets of genes are crucial for proper cell sorting and CNS development.
    • Mutants exhibit either excessive or subnormal CNS formation.
    • Cloned genes encode cell surface proteins/signal transducers and DNA-binding proteins (transcription factors).

    Conclusions:

    • Cell-cell interactions mediated by specific genes control neuroblast segregation.
    • The identified genes play critical roles in regulating the balance between neural and epidermal fates.
    • Distinct molecular mechanisms, involving cell surface signaling and transcriptional regulation, govern early CNS patterning.