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Related Experiment Video

Updated: Sep 23, 2025

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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
PubMed
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.

Keywords:
bone tissue regenerationcomposite scaffoldshuman mesenchymal stromal cellshybrid polymer devicehydrogelsopen-pore PLA-PCL coretissue engineering

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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.