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Measurement of Aggregate Cohesion by Tissue Surface Tensiometry
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Can tissue surface tension drive somite formation?

Ramon Grima1, Santiago Schnell

  • 1Complex Systems Group, Indiana University School of Informatics and Biocomplexity Institute, Eigenmann Hall 906, 1900 East Tenth Street, Bloomington, IN 47406, USA. r.grima@imperial.ac.uk

Developmental Biology
|June 5, 2007
PubMed
Summary
This summary is machine-generated.

Tissue surface tension unlikely drives somitogenesis sculpting. A chemotactic mechanism with heightened adhesion better explains the rapid morphological changes during somite formation in zebrafish development.

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Area of Science:

  • Developmental biology
  • Cell biology
  • Biophysics

Background:

  • Somitogenesis, the formation of somites, is crucial for embryonic development.
  • The current model involves a clock and wavefront mechanism for presomitic mesoderm segmentation.
  • Mesenchymal cells undergo compaction, detachment, and morphological changes to form rounded somites.

Purpose of the Study:

  • To investigate the role of tissue surface tension minimization in somite sculpting.
  • To evaluate the feasibility of surface tension as the primary driver of somitogenesis.
  • To propose an alternative mechanism for the rapid morphological changes during somite formation.

Main Methods:

  • Analysis of the physical constraints of tissue viscosity and timescale of somitogenesis.
  • Modeling the potential contribution of cell movement driven by surface tension.
  • Developing and proposing a chemotactic mechanism coupled with adhesion.

Main Results:

  • High tissue viscosity and the rapid timescale of somitogenesis limit the impact of surface tension-driven cell movement.
  • Surface tension is unlikely to be the sole or major driving force behind somite sculpting.
  • A chemotactic mechanism combined with increased cell adhesion can account for observed morphological changes.

Conclusions:

  • The prevailing model of somitogenesis may need refinement regarding the physical forces involved.
  • Chemotaxis and adhesion offer a more plausible explanation for the speed and efficiency of somite formation.
  • This study provides a new perspective on the biophysical mechanisms underlying embryonic segmentation.