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Preparation of Tunable Extracellular Matrix Microenvironments to Evaluate Schwann Cell Phenotype Specification
Published on: June 2, 2020
In situ elasticity modulation with dynamic substrates to direct cell phenotype.
April M Kloxin1, Julie A Benton, Kristi S Anseth
1Department of Chemical and Biological Engineering, University of Colorado, 424 UCB, ECCH 111, Boulder, CO 80309 USA.
Biomaterials
|October 1, 2009
Summary
Researchers developed a novel photodegradable hydrogel to dynamically control microenvironment elasticity. This biomaterial can reverse valvular interstitial cell (VIC) activation by decreasing substrate stiffness, offering new insights into tissue regeneration and fibrotic diseases.
Area of Science:
- Biomaterials Science
- Cell Biology
- Tissue Engineering
Background:
- Microenvironment elasticity critically impacts cellular functions like differentiation and cytoskeletal organization.
- Real-time modulation of material elasticity is limited, hindering the study of dynamic cellular processes.
- Valvular interstitial cells (VICs) play a key role in cardiac valve function and disease.
Purpose of the Study:
- To develop a photodegradable hydrogel for real-time elasticity modulation of the cellular microenvironment.
- To investigate the effect of substrate elasticity on VIC activation into myofibroblasts.
- To demonstrate the potential for dynamic elasticity changes to direct cell fate and reverse myofibroblast activation.
Main Methods:
- Fabrication of photodegradable hydrogels with tunable elastic moduli.
- Characterization of hydrogel properties using rheometry and atomic force microscopy (AFM).
- Culture of VICs on hydrogel substrates with varying and dynamically modulated elastic moduli.
Main Results:
- Generated hydrogels with a range of elastic moduli mimicking soft tissues.
- Identified specific elastic moduli that promote or suppress VIC myofibroblastic activation.
- Demonstrated that decreasing substrate modulus via photo-degradation can reverse established VIC myofibroblast activation.
Conclusions:
- Photodegradable hydrogels enable dynamic control over the cellular microenvironment's elasticity.
- Dynamic changes in substrate modulus can reversibly control VIC activation, offering a new strategy for therapeutic intervention.
- This technology has significant implications for designing advanced biomaterials for tissue regeneration and understanding fibrotic disease progression.
