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Engineered Extracellular Matrices with Integrated Wireless Microactuators to Study Mechanobiology.

Fazil E Uslu1, Christopher D Davidson2, Erik Mailand1

  • 1Institute of Mechanical Engineering and Institute of Bioengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland.

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Researchers developed a robotic platform to precisely control mechanical forces in fibrous matrices, offering new insights into cell behavior and mechanobiology within tissue-like environments.

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extracellular matrixfinite-element modelingmechanobiologymicromanipulationrobotics

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Area of Science:

  • Mechanobiology
  • Biomaterials Engineering
  • Cellular Mechanics

Background:

  • Traditional cell studies use planar substrates, which do not replicate native fibrous extracellular matrices (ECMs).
  • Native ECMs have complex fibrous structures that significantly influence cell-matrix mechanical interactions.
  • Understanding force transmission in 3D fibrous environments is crucial for mechanobiology.

Purpose of the Study:

  • To introduce a novel robotic manipulation platform for wireless, localized, and programmable deformation of engineered fibrous ECMs.
  • To enable the application of physiologically relevant mechanical forces to cells within a 3D matrix.
  • To investigate cell responses to dynamic and static mechanical cues in a tissue-relevant setting.

Main Methods:

  • Development of a robotic platform for magnetic actuation of engineered fibrous ECMs.
  • Creation of a finite-element digital twin to model forces and deformations within the fiber network.
  • Application of controlled mechanical forces to cells cultured on the fibrous matrix.
  • Analysis of cell migration and intracellular signaling in response to mechanical stimuli.

Main Results:

  • The platform allows precise control over localized and programmable deformation of fibrous ECMs.
  • Finite-element modeling accurately predicts stress and deformation under various magnetic actuation schemes.
  • Cells cultured on the platform exhibit altered migration and signaling in response to matrix-borne forces.
  • Dynamic and static force application reveals insights into mechanotransduction pathways.

Conclusions:

  • The developed robotic platform provides unprecedented capabilities for studying mechanobiology in 3D fibrous environments.
  • This technology enables the investigation of fundamental mechanisms of cell force sensation and response in tissue-like settings.
  • The platform has the potential to advance our understanding of how mechanical forces regulate cell behavior in native tissues.