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Related Concept Videos

Cell Migration01:09

Cell Migration

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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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Cell Migration01:19

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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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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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Intracellular Signaling Affects Focal Adhesions01:17

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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
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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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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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Quantitative Analysis of Random Migration of Cells Using Time-lapse Video Microscopy
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Signaling networks that regulate cell migration.

Peter Devreotes1, Alan Rick Horwitz2

  • 1Department of Cell Biology, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205.

Cold Spring Harbor Perspectives in Biology
|August 5, 2015
PubMed
Summary
This summary is machine-generated.

Cell migration relies on signaling pathways controlling the actin cytoskeleton and cell adhesion. Rho-family GTPases integrate these signals, driving directed cell movement through cytoskeletal regulation and wave-like activation patterns.

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Area of Science:

  • Cell Biology
  • Biochemistry

Background:

  • Cell migration is crucial for development and disease.
  • Signaling pathways regulate cell movement by controlling cytoskeletal organization and adhesion.

Purpose of the Study:

  • To elucidate the signaling networks governing cell migration.
  • To model the integration of molecular signals controlling cell movement.

Main Methods:

  • Analysis of signaling pathways involving Rho-family GTPases.
  • Investigating the role of actin regulators and myosin II.
  • Modeling network function and biochemical excitability.

Main Results:

  • Rho-family GTPases act as a central hub for migration signaling.
  • Actin regulators (formins, WASP/WAVE, Arp2/3) and myosin II are key effectors.
  • Signaling molecules form gradients that define cell polarity and drive directed migration.

Conclusions:

  • Cell migration is orchestrated by complex signaling networks with emergent properties like waves of activation.
  • These networks integrate external cues for directed cell movement.
  • Understanding these pathways is key to understanding cellular behaviors like neuronal growth and cytokinesis.