|Title:||Tuning the architecture of three-dimensional collagen hydrogels by physiological macromolecular crowding|
|Authors :||Dewavrin, Jean-Yves|
|Published in :||Acta biomaterialia|
|Publisher / Ed. Institution :||Elsevier|
|License (according to publishing contract) :||Licence according to publishing contract|
|Type of review:||Peer review (publication)|
|Subjects :||Biomaterial; Excluded-volume effect; Fibrillogenesis; Hydrogel; Cultured cells; Collagen type I; Hydrogel; Mesenchymal stromal cells; Porosity|
|Subject (DDC) :||660: Chemical engineering|
|Abstract:||Macromolecular crowding is an optimal physiological feature in intracellular and extracellular spaces, and results from a variety of macromolecules occupying space and contributing to a fractional volume occupancy. Here, we show that soft collagen hydrogels assembled in nature-inspired crowded conditions feature enhanced biophysical properties. We demonstrate that crowding tunes the rate of collagen nucleation and fiber growth, affecting fiber diameter and organization. Adjustments of crowding levels during collagen assembly tune the gel pore size, protein permeability, transparency and resistance to enzymatic degradation. Furthermore, gels assembled in crowded conditions are twice as resistant to mechanical stress as the controls, inducing a 70% boost of proliferation of stem cells cultured on tuned hydrogels. Emulating the crowdedness of interstitial fluids therefore represents a way to optimize the properties of soft collagen gels, with promising applications in soft biomaterials design.|
|Departement:||Life Sciences and Facility Management|
|Organisational Unit:||Institute of Chemistry and Biotechnology (ICBT)|
|Publication type:||Article in scientific journal|
|Appears in Collections:||Publikationen Life Sciences und Facility Management|
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