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Decellularized Apple-Derived Scaffolds for Bone Tissue Engineering In Vitro and In Vivo
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Novel mechanically competent polysaccharide scaffolds for bone tissue engineering.

S G Kumbar1, U S Toti, M Deng

  • 1Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA. Kumbar@uchc.edu

Biomedical Materials (Bristol, England)
|November 18, 2011
PubMed
Summary

New cellulose-derived scaffolds offer promising solutions for bone regeneration. These materials exhibit bone-like mechanical properties and support osteoblast growth, making them suitable for load-bearing applications.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Orthopedic Research

Background:

  • Scaffold-based bone regeneration requires materials with optimal mechanical and biological properties.
  • Cellulose derivatives offer inherent strength and biocompatibility, with a history of medical applications.
  • Existing porous polysaccharide scaffolds often lack the mechanical strength for load-bearing bone regeneration.

Purpose of the Study:

  • To fabricate and characterize novel three-dimensional (3D) porous sintered microsphere scaffolds from cellulose derivatives.
  • To evaluate the suitability of these scaffolds for load-bearing bone regeneration applications.
  • To assess the in vitro biological performance of the scaffolds with human osteoblasts.

Main Methods:

  • Fabrication of 3D porous scaffolds using a solvent/non-solvent sintering approach with cellulose derivatives.
  • Mechanical characterization, including compressive modulus and strength, and degradation studies over 24 weeks.
  • In vitro cell culture studies using human osteoblasts to evaluate cell growth, phenotype maintenance, alkaline phosphatase expression, and mineralization.

Main Results:

  • The fabricated cellulose-derived scaffolds demonstrated mechanical properties comparable to human trabecular bone.
  • Scaffolds exhibited a degradation rate of 10-15% weight loss over 24 weeks, with stress-strain behavior mimicking native bone.
  • Human osteoblasts showed progressive growth, maintained osteoblast phenotype, and exhibited enhanced alkaline phosphatase expression and mineralization compared to poly(lactic acid-glycolic acid) controls.

Conclusions:

  • Cellulose-derived microsphere scaffolds are mechanically competent for load-bearing applications in bone regeneration.
  • These scaffolds provide a favorable environment for osteoblast growth and differentiation.
  • The findings highlight the significant potential of cellulose-based materials for advancing scaffold-based bone regeneration strategies.