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Related Experiment Videos

The community effect, dorsalization and mesoderm induction

J B Gurdon1, K Kato, P Lemaire

  • 1Wellcome CRC Institute, University of Cambridge, UK.

Current Opinion in Genetics & Development
|August 1, 1993
PubMed
Summary
This summary is machine-generated.

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The community effect in amphibian gastrula drives muscle gene expression through cell interactions, not inducing molecules. This process creates distinct cell groups from a developmental potential gradient.

Area of Science:

  • Developmental biology
  • Cell-cell interactions
  • Amphibian embryogenesis

Background:

  • Muscle progenitor cells in amphibian gastrula require specific interactions for gene expression.
  • Dorsalization signals can induce muscle fate in ventral mesoderm cells.
  • Existing knowledge does not link these processes to mesoderm-inducing molecules.

Purpose of the Study:

  • To investigate the role of the community effect in initiating muscle-specific gene expression.
  • To understand how dorsalization signals influence mesoderm cell fate.
  • To clarify the mechanisms underlying muscle development in amphibians.

Main Methods:

  • Observational studies on amphibian gastrula development.
  • Analysis of cell-cell interactions among muscle progenitor cells.

Related Experiment Videos

  • Investigating signaling pathways involved in dorsalization and muscle fate determination.

    • Main Results:

    • The community effect, an interaction among muscle progenitor cells, is essential for initiating muscle-specific gene expression.
    • Dorsalization provides a signal capable of converting ventral mesoderm cells to a muscle fate.
    • Neither the community effect nor dorsalization involves mesoderm-inducing molecules.

    Conclusions:

    • The community effect is crucial for generating homogeneous, demarcated cell groups from a continuous gradient of developmental potential.
    • Cellular interactions, rather than inducing molecules, play a key role in early muscle development.
    • This highlights a novel mechanism for pattern formation during embryonic development.