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Engineering a Bilayered Hydrogel to Control ASC Differentiation

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Engineering a macroporous fibrin-based sequential interpenetrating polymer network for dermal tissue engineering.

Olfat Gsib¹, Loek J Eggermont², Christophe Egles¹

¹Laboratoire de BioMécanique et BioIngénierie (BMBI), UMR CNRS 7388, Sorbonne Universités, Université de Technologie of Compiègne (UTC), Compiègne, France. s.bencherif@northeastern.edu.

Biomaterials Science

|October 22, 2020

Summary

This summary is machine-generated.

This study developed novel macroporous fibrin-based interpenetrating polymer networks (IPNs) for skin repair. These enhanced biomaterials promote cell infiltration and tissue regeneration, showing promise for deep wound healing.

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Area of Science:

Biomaterials Science
Tissue Engineering
Regenerative Medicine

Background:

Skin tissue engineering requires advanced biomaterials for effective deep wound healing.
Developing innovative scaffolds that mimic the native extracellular matrix is crucial.

Purpose of the Study:

To synthesize and characterize novel macroporous, mechanically reinforced, naturally-derived interpenetrating polymer networks (IPNs) for skin repair.
To evaluate the biocompatibility and regenerative potential of these IPN hydrogels.

Main Methods:

Synthesis of mesoporous polyethylene glycol and biodegradable serum albumin (PEGDM-co-SAM) hydrogels.
Cryotreatment to create macroporosity, followed by fibrin incorporation to form sequential IPNs.
Characterization using rheological measurements, in vitro cell studies (fibroblast infiltration, proliferation, ECM secretion), and in vivo preclinical implantation in mice.

Main Results:

Fibrin-based sequential IPN hydrogels demonstrated improved and tunable mechanical properties compared to fibrin alone.
In vitro studies confirmed human dermal fibroblast adhesion, infiltration, proliferation, and secretion of collagen I and fibronectin.
In vivo studies showed IPN stability, minimal inflammation, and significant cellular infiltration and tissue remodeling over one month.

Conclusions:

Macroporous and mechanically reinforced fibrin-based sequential IPN hydrogels are promising platforms for dermal tissue regeneration.
These biomaterials support cell infiltration and endogenous matrix deposition, facilitating wound healing.