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Repair of a Critical-sized Calvarial Defect Model Using Adipose-derived Stromal Cells Harvested from Lipoaspirate
Published on: October 31, 2012
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Engineered Injectable Cell-Laden Chitin/Chitosan Hydrogel with Adhesion and Biodegradability for Calvarial Defect
Xueyu Jiang1,2, Fanwei Zeng3, Lina Zhang1
1College of Chemistry and Molecular Sciences, Hubei Engineering Center of Natural Polymer-based Medical Materials, Wuhan University, Wuhan 430072, China.
ACS Applied Materials & Interfaces
|April 19, 2023
Summary
This study developed a novel biomimetic hydrogel for bone repair, combining dynamic bonds for strength and self-healing. The injectable, biodegradable material effectively promotes bone regeneration using mesenchymal stem cells.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Polymer Chemistry
Background:
- Achieving high mechanical strength and dynamic crosslinking in hydrogels is challenging.
- Biological tissues exhibit self-healing properties, offering a model for advanced biomaterials.
- Bone reconstruction engineering requires materials with specific mechanical, biological, and degradation properties.
Purpose of the Study:
- To fabricate biomimetic hydrogels with enhanced mechanical strength, injectability, biodegradability, and self-healing properties for bone reconstruction.
- To investigate the potential of combining multiple dynamic bond mechanisms within a polysaccharide network.
- To create a low-cost, multifunctional hydrogel carrier for bone repair applications.
Main Methods:
- Fabrication of hydrogels using a polysaccharide network integrated with acylhydrazone and imine dynamic bonds.
- Characterization of hydrogel mechanical strength, injectability, biodegradability, and self-healing capabilities.
- In vitro evaluation of cell viability, osteogenic differentiation, and bone reconstruction using rat bone marrow-derived mesenchymal stem cells (rBMSCs).
Main Results:
- Hydrogels demonstrated robust mechanical strength (>10 kPa) due to stable acylhydrazone bonds.
- The dual dynamic bonding system (imine and acylhydrazone) provided optimal reversibility for cell protection during injection and mimicked the extracellular matrix (ECM) for cell differentiation.
- Satisfactory biodegradation (>8 weeks) and effective bone reconstruction were observed in rBMSC-laden hydrogels, without the need for prefabrication or incubation.
Conclusions:
- The proposed strategy efficiently constructs a low-cost, multifunctional hydrogel suitable for bone repair.
- Polysaccharide-based hydrogels with combined dynamic bonds serve as optimal carriers for enabling cellular functions in bone regeneration.
- The developed biomimetic hydrogels show significant potential for clinical applications in bone reconstruction engineering.
