Elastic modulus and hydraulic permeability of MDCK monolayers
K D Schulze1, S M Zehnder1, J M Urueña1
1Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, United States.
Journal of Biomechanics
|February 9, 2017
Summary
Researchers developed a new method to measure cell mechanics in tissues. They found that how easily fluid moves through cells significantly impacts tissue elasticity and force response over time.
Area of Science:
- Biophysics
- Cell Biology
- Tissue Engineering
Background:
- Cell mechanics are crucial for tissue health.
- Existing in vitro methods measure local cell elasticity but don't fully connect to tissue-level mechanics.
- A gap exists in understanding multi-cellular mechanics and its relation to tissue properties.
Purpose of the Study:
- To develop and validate a novel in vitro technique for measuring multi-cellular mechanics.
- To investigate the role of fluid transport and cell permeability in the mechanical properties of cell monolayers.
- To bridge the gap between local cell properties and bulk tissue mechanics.
Main Methods:
- Development of a monolayer indentation technique for in vitro measurement.
- Application of the technique to assess the elasticity of cell monolayers.
- Analysis of fluid transport resistance across cell layers.
Main Results:
- The monolayer indentation technique successfully measures multi-cellular mechanics.
- Fluid permeability significantly influences the mechanical response of cell monolayers.
- Resistance to fluid transport dictates the force-response of cells at longer timescales.
Conclusions:
- The developed technique provides a new tool for studying multi-cellular mechanics.
- Fluid transport is a key determinant of tissue-level mechanical behavior.
- Understanding cell-level fluid dynamics is essential for predicting tissue mechanical properties.
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