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Engineering Three-dimensional Epithelial Tissues Embedded within Extracellular Matrix
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No strings attached: new insights into epithelial morphogenesis.

Lance A Davidson1

  • 1University of Pittsburgh, Pittsburgh, PA 15213, USA. lad43@pitt.edu

BMC Biology
|December 22, 2012
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Summary
This summary is machine-generated.

Tissue sheet ingression during gastrulation relies on cell cortex dynamics, not just actomyosin purse-strings. Recent studies reveal global actomyosin network contractions and flow remodel epithelial and mesenchymal sheets.

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Biophysics

Background:

  • Tissue sheet ingression is crucial for embryonic development, particularly during gastrulation.
  • Actomyosin contractility, specifically purse-string structures, has been the primary proposed mechanism driving this process.

Purpose of the Study:

  • To investigate alternative mechanisms of tissue sheet ingression beyond traditional actomyosin purse-strings.
  • To explore the role of global cortical actomyosin network dynamics in cell sheet remodeling.

Main Methods:

  • Analysis of recent studies on cell sheet dynamics.
  • Observation of actomyosin network behavior in epithelial and mesenchymal cells.
  • Investigating punctuated contractions and network flow.

Main Results:

  • Tissue ingression mechanisms are not solely dependent on purse-string actomyosin contractility.
  • Global cortical actomyosin networks exhibit dynamic contractions and flow.
  • These dynamics effectively remodel both epithelial and mesenchymal tissue sheets.

Conclusions:

  • The understanding of tissue morphogenesis needs to incorporate global actomyosin network dynamics.
  • Cellular mechanics involving cortical networks offer alternative explanations for tissue sheet movements.
  • This revised perspective is essential for comprehending fundamental developmental processes.