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Related Experiment Video

Updated: Jun 14, 2025

Fabrication of Decellularized Cartilage-derived Matrix Scaffolds
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Cell-free bilayer functionalized scaffold for osteochondral tissue engineering.

Seyedeh Mahsa Khatami1, Hana Hanaee-Ahvaz2, Kazem Parivar1

  • 1Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.

Journal of Bioscience and Bioengineering
|September 3, 2024
PubMed
Summary

This study developed a novel bilayer scaffold for osteochondral tissue engineering. The scaffold successfully promoted cartilage and bone regeneration in rat defects, offering a promising cell-free therapeutic approach.

Keywords:
ChondrogenesisElectrospinningMesenchymal stem cellsOsteochondral tissueOsteogenesis

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Osteochondral defects pose significant clinical challenges, with current treatments having limitations.
  • Layered scaffolds offer a promising strategy for osteochondral tissue engineering.
  • Previous work explored mesenchymal stem cell (MSC) chondrogenesis on polycaprolactone (PCL)/acetylated hyaluronic acid scaffolds.

Purpose of the Study:

  • To fabricate and evaluate a novel bilayer scaffold for osteochondral defect regeneration.
  • To assess the osteoconductive potential of a bismuth-nanohydroxyapatite/reduced graphene oxide (Bi-nHAp/rGO)/PCL nanocomposite.
  • To investigate the efficacy of a cell-free bilayer scaffold in promoting both chondrogenesis and osteogenesis in vivo.

Main Methods:

  • Fabrication of an osteoconductive Bi-nHAp/rGO/PCL scaffold.
  • Evaluation of osteoconductivity using alkaline phosphatase (ALP) activity and osteogenic gene expression in adipose-derived MSCs.
  • Preparation of a bilayer scaffold (osteogenic layer: Bi-nHAp/rGO/PCL; chondrogenic layer: acetylated hyaluronic acid/PCL) via electrospinning.
  • In vivo transplantation into rat osteochondral defects and analysis of chondrogenic and osteogenic markers (real-time PCR, immunohistochemistry) after 60 days.

Main Results:

  • The Bi-nHAp/rGO/PCL scaffold demonstrated significant osteoconductive potential.
  • The bilayer scaffold promoted enhanced chondrogenic gene expression (Sox9, collagen II) and osteogenic gene expression (osteocalcin, ALP).
  • Increased secretion of collagen II and X was observed in the surrounding tissues of the transplanted scaffold.

Conclusions:

  • The developed cell-free bilayer scaffold effectively induces osteochondral defect regeneration.
  • This novel scaffold holds significant promise as a therapeutic strategy for treating osteochondral defects.
  • The combination of osteoconductive and chondrogenic layers facilitates coordinated tissue repair.