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Hybrid Microgels with Thermo-Tunable Elasticity for Controllable Cell Confinement
Sebastian Hackelbusch1, Torsten Rossow1,2,3, Dirk Steinhilber4
1Freie Universität Berlin Institute of Chemistry and Biochemistry, Takustr. 3, D-14195, Berlin, Germany.
Advanced Healthcare Materials
|June 20, 2015
Summary
Researchers developed thermo-responsive hydrogels using biocompatible polymers for cell studies. These stimuli-responsive materials allow precise investigation of cell-matrix interactions, advancing stem cell research.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Cell Biology
Background:
- Stimuli-responsive hydrogels alter physical properties like elastic moduli based on environmental changes.
- Biocompatible hydrogels encapsulating living cells enable consistent investigation of cell-matrix interactions.
Purpose of the Study:
- To present thermo-responsive macro- and microscopic hydrogels for cell encapsulation and interaction studies.
- To demonstrate a bio-orthogonal crosslinking strategy for creating tunable hydrogel elasticity.
Main Methods:
- Synthesis of azide-functionalized copolymers (poly(N-(2-hydroxypropyl)-methacrylamide) and poly(hydroxyethyl methacrylate) grafted with poly(N-isopropylacrylamide)).
- Bio-orthogonal strain-promoted azide-alkyne cycloaddition using cyclooctyne-functionalized poly(ethylene glycol) for hydrogel crosslinking.
- Encapsulation of living cells using droplet-based microfluidics.
Main Results:
- Developed hybrid hydrogels with thermo-tunable elasticity.
- Elasticity is controllable via polymer chain length and grafting density.
- Demonstrated successful encapsulation of living cells within stimuli-responsive microgels.
Conclusions:
- The developed hydrogels are a suitable platform for investigating cell-matrix interactions.
- This technology advances systematic stem cell research by providing controlled microenvironments.
- Bio-orthogonal click chemistry offers a versatile approach for creating advanced biomaterials.
