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Directed Cellular Self-Assembly to Fabricate Cell-Derived Tissue Rings for Biomechanical Analysis and Tissue Engineering
Published on: November 25, 2011
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Mechanical characterization of regenerating Hydra tissue spheres
Thomas Perros1, Anaïs Biquet-Bisquert2, Zacchari Ben Meriem3
1University Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, Villeurbanne, France.
Biophysical Journal
|May 24, 2024
Summary
This study quantifies the mechanical properties of Hydra vulgaris, revealing distinct elastic, viscoelastic, and rupture behaviors under stress. These findings are crucial for understanding Hydra regeneration and developing new mechanochemical models.
Area of Science:
- Developmental Biology
- Biophysics
- Mechanobiology
Background:
- Hydra vulgaris exhibits remarkable regenerative capabilities and serves as a model for spontaneous patterning.
- Early patterning in Hydra regeneration is an integrated mechanochemical process influenced by tissue mechanics.
- Understanding Hydra self-organization is hindered by a lack of knowledge regarding its mechanical properties.
Purpose of the Study:
- To characterize the mechanical properties of Hydra vulgaris tissues.
- To quantify the relationship between applied stress and tissue behavior.
- To inform the development of mechanochemical models for Hydra regeneration.
Main Methods:
- Utilized microfluidic devices for parallelized microaspiration rheological experiments.
- Performed numerical simulations to complement experimental data.
- Employed models of deformable shells to quantify mechanical parameters.
Main Results:
- Identified three distinct mechanical behaviors: elastic response, viscoelastic response, and tissue rupture, dependent on applied stress.
- Quantified Young's modulus and shear viscosity of Hydra tissues.
- Determined critical stresses for transitions between mechanical behaviors.
Conclusions:
- Established a quantitative description of tissue mechanics during Hydra regeneration.
- Provided essential experimental data for developing novel mechanochemical models of patterning.
- Advanced the understanding of the interplay between mechanics and morphogen dynamics in Hydra self-organization.
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