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Related Concept Videos

Cell Migration01:19

Cell Migration

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Cell migration is a process by which the cells move from one location to another, playing an essential role in embryological development, repair and regeneration, immune response, and metastasis. Cells migrate in response to chemical or mechanical signals generated by specific organs or tissues. The overall mechanism includes three steps - polarization, protrusion, and release. Polarization involves the formation of a distinct cell front and rear, which determines the direction of movement.
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Cell Migration01:09

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Cell migration, the process by which cells move from one location to another, is essential for the proper development and viability of organisms throughout their life. When cells are not able to migrate properly to their ordained locations, various disorders may occur. For example, disruption in cell migration causes chronic inflammatory diseases such as arthritis.
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Cytoskeletal Coordination in Cell Migration01:32

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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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Role of Myosin in Cell Migration01:18

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Myosins are multimeric motor proteins involved in various cellular processes such as migration, adhesion, and proliferation. Myosin II is the most common type in animal cells, which binds and cross-links actin filaments.
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Chemotaxis and Direction of Cell Migration01:21

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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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Actin Polymerization and Cell Motility01:13

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Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
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Related Experiment Video

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Characterizing Cell Migration Within Three-dimensional In Vitro Wound Environments
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Protrusive waves guide 3D cell migration along nanofibers.

Charlotte Guetta-Terrier1, Pascale Monzo1, Jie Zhu2

  • 1Mechanobiology Institute, National University of Singapore, Singapore 117411.

The Journal of Cell Biology
|November 11, 2015
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This summary is machine-generated.

Cells migrate on fibrous matrices using dynamic, fin-like actin waves. These waves, driven by specific molecular pathways and adhesion sites, enable persistent directional movement and matrix deformation for cell translocation.

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Area of Science:

  • Cell Biology
  • Biophysics
  • Materials Science

Background:

  • Cell migration in 3D fibrous environments is crucial but mechanistically complex.
  • Investigating cell migration on complex matrices is challenging.

Purpose of the Study:

  • To elucidate the molecular and physical mechanisms of single-cell migration on 3D nanofibers.
  • To understand the role of actin-based structures in cell translocation.

Main Methods:

  • Utilized reductionist approaches with 3D electrospun fibronectin-coated nanofibers.
  • Observed cell migration using various cell types.
  • Combined experimental data with computational modeling.

Main Results:

  • Identified lateral actin-based waves, fin-like in shape, driving cell migration.
  • Demonstrated these waves propagate from adhesion sites, promoting persistent directional movement.
  • Showed balanced activation of Rac1/N-WASP/Arp2/3 and Rho/formins pathways generates these waves.

Conclusions:

  • Cell migration on fibrous matrices requires dynamic, actin-based fin-like protrusions.
  • Actomyosin contractility linked to adhesion sites is essential for force generation and cell movement.
  • Understanding these mechanisms is key for studying cell behavior in complex 3D environments.