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Poly-ε-caprolactone composite scaffolds for bone repair.

R Di Liddo1, P Paganin1, S Lora2

  • 1Department of Pharmaceutical and Pharmacological Sciences, University of Padua, 35131 Padua, Italy.

International Journal of Molecular Medicine
|October 17, 2014
PubMed
Summary
This summary is machine-generated.

Bone defect treatments using poly-ε-caprolactone scaffolds are enhanced by bone extracellular matrix (BP). BP improves cell viability and osteogenic differentiation compared to hydroxyapatite (HA) for orthopedic applications.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Orthopedic Regenerative Medicine

Background:

  • Synthetic biomaterials combined with cells and osteogenic factors offer promise for treating orthopedic diseases like bone trauma.
  • Optimizing bone substitute properties, including 3D structure and porosity, is crucial for cell migration, proliferation, vascularization, and waste removal.

Purpose of the Study:

  • To optimize poly-ε-caprolactone scaffolds (PCL-AT) by incorporating synthetic hydroxyapatite (HA) or rat bone extracellular matrix (BP).
  • To evaluate the effects of these composite scaffolds on rabbit bone marrow-derived mesenchymal stem cells (rMSCs) for bone regeneration.

Main Methods:

  • Fabrication of poly-ε-caprolactone scaffolds with alginate threads (PCL-AT), incorporating either hydroxyapatite (HA) or bone extracellular matrix (BP).
  • Characterization of scaffold structure and porosity using Micro-CT and scanning electron microscopy.
  • Evaluation of rMSC adhesion, proliferation, viability, and osteogenic differentiation on the composite scaffolds.

Main Results:

  • Porous PCL-AT scaffolds with HA or BP exhibited a trabecular bone-like structure with interconnected pores.
  • Both PCL-AT-HA and PCL-AT-BP scaffolds supported rMSC growth in the early phase.
  • The presence of BP significantly prolonged rMSC viability in the late phase and led to earlier Runx2 expression, indicating enhanced osteogenic maturation.

Conclusions:

  • Bone extracellular matrix (BP) is superior to hydroxyapatite (HA) in enhancing cell viability and osteogenic differentiation in poly-ε-caprolactone scaffolds for bone tissue engineering.
  • PCL-AT-BP composite scaffolds show significant potential for improving orthopedic disease treatment by controlling the osteogenic maturation process.