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Related Experiment Video

Updated: Jul 1, 2025

A Microfluidic Technique to Probe Cell Deformability
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Using a micro-device with a deformable ceiling to probe stiffness heterogeneities within 3D cell aggregates.

Shreyansh Jain1,2, Hiba Belkadi1,2, Arthur Michaut3

  • 1Institut Pasteur, Université Paris Cité, Physical Microfluidics and Bioengineering, 25-28 Rue du Dr Roux, 75015 Paris, France.

Biofabrication
|March 6, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel micro-device to measure the mechanical properties of 3D multicellular spheroids, linking cell behavior to tissue function. This platform enables multi-scale analysis of mechanical responses in engineered tissues.

Keywords:
mechanicsmicrofluidicsmulticellular aggregatesspheroid

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Area of Science:

  • Mechanobiology
  • Biophysics
  • Tissue Engineering

Background:

  • Single-cell mechanical characterization is established, but understanding 3D multicellular aggregates is crucial for mimicking tissue function.
  • A need exists to link the mechanical properties of 3D multicellular aggregates to their functional behavior.

Purpose of the Study:

  • To present a novel micro-device platform for actuating and observing multiple 3D multicellular aggregates simultaneously.
  • To establish a link between the mechanical properties and functional behavior of 3D multicellular aggregates.

Main Methods:

  • A deformable micro-device made from polydimethylsiloxane (PDMS) cast on a 3D-printed mold.
  • Controlled air pressure actuation to induce vertical displacement of a cell-containing chamber.
  • Image correlation methods combined with finite element simulations to measure stiffness heterogeneities.
  • Cell and cytoskeleton labeling for correlating structure with mechanical properties.

Main Results:

  • The platform enables static and dynamic actuation of multicellular aggregates over various timescales and displacement amplitudes.
  • Stiffness heterogeneities within co-culture spheroids can be measured by analyzing compression-induced image correlations.
  • Multi-scale measurements linking single-cell behavior to the global mechanical response of aggregates are achievable.

Conclusions:

  • The developed platform provides a new tool for studying the mechanics of 3D multicellular aggregates.
  • This technology advances the understanding of mechanobiology in complex tissue models.
  • It facilitates multi-scale investigations into the structure-mechanics-function relationships in engineered tissues.