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Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
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A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
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Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
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Related Experiment Video

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Traction Microscopy Integrated with Microfluidics for Chemotactic Collective Migration
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Rho-directed forces in collective migration.

Peter Friedl1, Katarina Wolf2, Mirjam M Zegers1

  • 1Department of Cell Biology, Radboud University Nijmegen Medical Centre, 6500 HB Nijmegen, The Netherlands.

Nature Cell Biology
|March 1, 2014
PubMed
Summary
This summary is machine-generated.

RhoA signaling regulates leader-follower cell hierarchy and mechanical coupling in collective cell migration. This coordination ensures proper cell sheet movement and prevents the formation of extra leading edges.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Mechanobiology

Background:

  • Collective cell migration is crucial for development and wound healing.
  • Multicellular mechanocoupling, the coordination of forces between cells, is essential for directional movement.
  • The role of specific signaling pathways, like Rho GTPase activity, in establishing leader-follower cell dynamics remains incompletely understood.

Purpose of the Study:

  • To investigate the role of Rho GTPase activity in coordinating cell migration.
  • To elucidate how RhoA signaling influences leader-follower cell hierarchy and multicellular mechanocoupling.
  • To understand the mechanisms preventing aberrant cell sheet protrusion.

Main Methods:

  • Simultaneous measurement of Rho GTPase activity and cellular forces in migrating epithelial cell sheets.
  • Utilizing advanced microscopy and force-sensing techniques.
  • Quantitative analysis of cytoskeletal contractility and cell-cell force transmission.

Main Results:

  • RhoA activity directly correlates with the establishment of leader-follower cell hierarchy.
  • RhoA signaling is critical for maintaining multicellular cytoskeletal contractility.
  • Mechanocoupling between leader and follower cells is precisely controlled by RhoA to ensure directional migration.

Conclusions:

  • RhoA acts as a key regulator of leader-follower cell interactions during collective migration.
  • Proper regulation of mechanocoupling by RhoA prevents the formation of ectopic leading edges.
  • This study provides new insights into the molecular mechanisms governing coordinated cell sheet movement.