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Related Experiment Video

Updated: Mar 13, 2026

Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo
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Heterogeneous force network in 3D cellularized collagen networks.

Long Liang1, Christopher Jones, Shaohua Chen

  • 1Department of Physics, Arizona State University, Tempe, AZ, 85287, USA.

Physical Biology
|October 26, 2016
PubMed
Summary
This summary is machine-generated.

Contractile cells transmit forces through 3D collagen-I networks via force chains. These chains enable long-range force transmission, with their number increasing with cell contraction and collagen concentration.

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Area of Science:

  • Biophysics
  • Cellular Mechanics
  • Biomaterials Science

Background:

  • Collagen networks regulate cellular dynamics through signaling pathways.
  • Understanding force transmission in these networks is crucial for cell biology and tissue engineering.

Purpose of the Study:

  • To investigate the transmission of forces generated by contractile cells in 3D collagen-I networks.
  • To model the microstructure and mechanical behavior of collagen networks under cell contraction.

Main Methods:

  • Derived graph representations of collagen networks (1, 2, 4 mg ml⁻¹) from microscopy data.
  • Modeled cell contraction via correlated nodal displacements (focal adhesions).
  • Employed a nonlinear elastic model for fiber bundles and a force-based relaxation method for network equilibrium.

Main Results:

  • Forces are transmitted through heterogeneous force chains originating from contracting cells.
  • Force chains exhibit slower decay than radially averaged forces, indicating long-range transmission.
  • The number of force chains increases with cell contraction and collagen concentration.

Conclusions:

  • The fibrous nature of collagen networks supports long-range force transmission via force chains.
  • Force chain emergence and propagation are dependent on cell contraction levels and network density.
  • Nonlinear mechanical effects are localized near the cell surface.