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Related Concept Videos

Cell-matrix's Response to Mechanical Forces01:13

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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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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
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Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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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: Mar 19, 2026

A Simplified System for Evaluating Cell Mechanosensing and Durotaxis In Vitro
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A Simplified System for Evaluating Cell Mechanosensing and Durotaxis In Vitro

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Cell Mechanosensitivity is Enabled by the LINC Nuclear Complex.

Gunes Uzer1, Clinton T Rubin2, Janet Rubin1

  • 1Department of Medicine, University of North Carolina, Chapel Hill, NC 27599.

Current Molecular Biology Reports
|June 22, 2016
PubMed
Summary
This summary is machine-generated.

Mesenchymal stem cell (MSC) mechanobiology is regulated by the Linker of Nucleoskeleton and Cytoskeleton (LINC) complex, a dynamic signaling platform. Compromised LINC function contributes to musculoskeletal diseases and aging.

Keywords:
ActinBoneDifferentiationEmerinFAKFatLaminNesprinNucleoskeletonSun

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Validation of a Mouse Model to Disrupt LINC Complexes in a Cell-specific Manner
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Validation of a Mouse Model to Disrupt LINC Complexes in a Cell-specific Manner

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Area of Science:

  • Cell Biology
  • Biophysics
  • Biomedical Engineering

Background:

  • Mesenchymal stem cells (MSCs) are crucial for tissue repair and their differentiation is influenced by mechanical forces.
  • The Linker of Nucleoskeleton and Cytoskeleton (LINC) complex connects the cytoplasm to the nucleus, playing a role in mechanotransduction.
  • Understanding the integrated role of the cytoskeleton, nuclear envelope, and nucleoskeleton in MSC mechanobiology is essential.

Purpose of the Study:

  • To review recent advances in understanding how LINC complexes regulate MSC mechanobiology.
  • To explore the role of LINC-mediated connectivity as a dynamic signaling platform.
  • To discuss the implications of LINC complex dysfunction in disease and aging.

Main Methods:

  • Literature review focusing on the interplay between the cytoskeleton, LINC complexes, and the nucleus.
  • Analysis of how mechanical signals are sensed and transmitted within MSCs.
  • Examination of disease- and age-related changes in LINC complexes and nucleoskeleton.

Main Results:

  • The LINC complex acts as an integrated dynamic signaling platform, connecting the cytoplasmic cytoskeleton, nuclear envelope, and nucleoskeleton.
  • This interconnectivity is critical for mechanical signal transduction into the nucleus, influencing MSC fate.
  • Compromised LINC complexes and nucleoskeleton are implicated in the etiology of musculoskeletal diseases.

Conclusions:

  • Nuclear and LINC-mediated cytoskeletal connectivity are vital mechanosensory and mechanoresponsive structures regulating MSC fate.
  • Acquired LINC dysfunction may contribute to aging, microgravity effects, and osteoporosis.
  • Mechanical strategies targeting LINC connectivity offer potential therapeutic avenues for these conditions.