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Related Experiment Videos

Cell polarity and cell diversification during early mouse embryogenesis.

C Gueth-Hallonet1, B Maro

  • 1Laboratoire de Physiologie du Developpement, Institut Jacques Monod, CNRS, Université Paris VII, France.

Trends in Genetics : TIG
|August 1, 1992
PubMed
Summary

Early mouse embryos develop cell polarity and asymmetric divisions, establishing distinct trophectoderm and inner cell mass lineages. This developmental flexibility allows for adaptable cell fate determination.

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Area of Science:

  • Developmental biology
  • Cell biology
  • Embryology

Background:

  • During mammalian development, the transition from radial symmetry to cell polarity is crucial.
  • This process occurs at the eight-cell stage in mouse embryos.
  • Polarity acquisition is a prerequisite for establishing early embryonic lineages.

Purpose of the Study:

  • To investigate the role of cell polarity in early mouse development.
  • To understand the mechanisms leading to the formation of trophectoderm and inner cell mass.
  • To explore the concept of developmental flexibility in embryonic cell fate determination.

Main Methods:

  • Observation of blastomere organization and division patterns.
  • Analysis of cell-cell interactions and signaling pathways.

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  • Genetic or molecular manipulation to assess the impact of polarity.

    • Main Results:

    • Mouse blastomeres transition from radial symmetry to a polarized state at the eight-cell stage.
    • Polarized cells undergo asymmetric divisions.
    • These divisions generate distinct trophectoderm and inner cell mass cell populations.

    Conclusions:

    • Cell polarity and asymmetric division are fundamental for establishing the first two cell lineages in mouse embryos.
    • Cell fate is not irreversibly determined early in development, allowing for significant developmental plasticity.