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Hybrid Core-Shell Polymer Scaffold for Bone Tissue Regeneration.
Luciana Sartore1, Chiara Pasini1, Stefano Pandini1
1Department of Mechanical and Industrial Engineering, University of Brescia, 25133 Brescia, Italy.
International Journal of Molecular Sciences
|May 14, 2022
Summary
This study developed novel core-shell scaffolds for bone regeneration. These biocompatible scaffolds mimic bone structure and stiffness, supporting human stem cell growth and differentiation for tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Scaffolds are crucial for tissue engineering, supporting stem cells and replacing damaged tissue.
- Developing effective bone regeneration scaffolds requires balancing mechanical support with biocompatibility.
- Existing methods may involve chemical issues or lack bioactive properties.
Purpose of the Study:
- To develop novel composite scaffolds with a core-shell structure for bone tissue regeneration.
- To create scaffolds that provide temporary mechanical support (core) and enhance biocompatibility and bioactivity (shell).
- To investigate the potential of these scaffolds for supporting human mesenchymal stromal cells and osteogenic differentiation.
Main Methods:
- Fabrication of a porous core using poly(lactic acid), poly(ε-caprolactone), and leachable superabsorbent polymer particles.
- Leaching of polymer particles to create an interconnected porous structure.
- Grafting a gelatin/chitosan hydrogel shell onto the core.
- Physicochemical, morphological, and mechanical characterization using techniques like SEM, FTIR, TGA, and mechanical testing.
- In vitro cell studies using human mesenchymal stromal cells.
Main Results:
- The core-shell scaffolds exhibited an interconnected porous structure without chemical issues.
- Characterization confirmed the hybrid structure closely mimics the morphology and stiffness of native bone.
- In vitro studies demonstrated efficient seeding, viability, and proliferation of human mesenchymal stromal cells on the scaffolds.
- Cells showed potential for differentiation towards the osteogenic phenotype upon stimulation.
Conclusions:
- The developed core-shell scaffolds represent a promising biomaterial for bone tissue engineering.
- The unique structure provides mechanical support while the bioactive shell promotes cell interaction and osteogenic differentiation.
- These scaffolds offer a solvent-free, cell-friendly environment for regenerative medicine applications.
