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Related Concept Videos

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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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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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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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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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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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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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Related Experiment Video

Updated: Jul 8, 2025

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3D matrix adhesion feedback controls nuclear force coupling to drive invasive cell migration.

Daniel Newman1, Lorna E Young1, Thomas Waring1

  • 1Institute of Systems, Molecular, and Integrative Biology, University of Liverpool, Liverpool, UK.

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|December 15, 2023
PubMed
Summary

Breast cancer cell invasion relies on specific protein interactions that enable cell movement through tissues. This study identifies a key complex driving cell migration and force transmission for invasion.

Keywords:
CP: Cell biologyactinadhesioncontractilityintegrin-based adhesion complexesinvasionmyosinnuclear force couplingpolarityprotrusion

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Area of Science:

  • Cellular Biology
  • Cancer Research
  • Biophysics

Background:

  • Cell invasion is crucial for cancer metastasis.
  • Understanding cell-matrix interactions is key to inhibiting cancer spread.

Purpose of the Study:

  • To identify protein complexes involved in invasive breast cancer cell migration.
  • To elucidate the mechanism of force transmission during cell invasion.

Main Methods:

  • Analysis of cell-matrix adhesion complexes in 3D matrices.
  • Investigation of protein interactions using biochemical assays.
  • Microscopy to observe force transmission and cell polarity.

Main Results:

  • Identified a novel interaction complex involving βPix, myosin18A (Myo18A), and non-muscle myosin 2A (NM2A) essential for invasive migration.
  • Demonstrated that this complex drives polarized NM2A recruitment to adhesion sites.
  • Observed active force transmission to the nucleus, facilitated by a myosin isoform gradient.

Conclusions:

  • The identified complex and resulting myosin gradient are critical for invasive migration and maintaining cell polarity.
  • Targeting these mechanisms could offer new strategies for cancer therapy.