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Bioactive Microsphere-Based Scaffolds Containing Decellularized Cartilage.

Amanda J Sutherland1, Michael S Detamore2,3

  • 1Bioengineering Graduate Program, University of Kansas, Lawrence, 66045, Kansas, USA.

Macromolecular Bioscience
|March 31, 2015
PubMed
Summary
This summary is machine-generated.

Microsphere scaffolds with decellularized cartilage (DCC) show promise for cartilage regeneration. DCC encapsulation enhanced cell response, yielding higher glycosaminoglycan and hydroxyproline content, suggesting potential for bioactive cartilage repair.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Cartilage defects represent a significant clinical challenge.
  • Developing functional scaffolds for cartilage regeneration is crucial.
  • Decellularized cartilage (DCC) offers a promising biomaterial for tissue repair.

Purpose of the Study:

  • To fabricate microsphere-based scaffolds incorporating decellularized cartilage (DCC).
  • To evaluate the chondrogenic potential of DCC-loaded scaffolds using rat bone marrow-derived mesenchymal stem cells (rBMSCs) in vitro.
  • To compare DCC encapsulation versus surface coating within poly(d,l-lactic-co-glycolic acid) (PLGA) scaffolds.

Main Methods:

  • Fabrication of four scaffold types: PLGA only, TGF-β encapsulated, DCC surface-coated, and DCC encapsulated.
  • Seeding of scaffolds with rBMSCs and culture for up to 6 weeks.
  • Assessment of mechanical properties (compressive modulus), gene expression, glycosaminoglycan (GAG) content, and hydroxyproline levels.

Main Results:

  • DCC-encapsulated scaffolds showed significantly higher GAG content (70%) and hydroxyproline (85%) compared to TGF-β controls at week 3.
  • Gene expression was comparable between DCC-encapsulated and TGF-β encapsulated groups.
  • DCC encapsulation demonstrated improved bioactivity and cell response compared to DCC coating.

Conclusions:

  • Microsphere-based scaffolds incorporating DCC exhibit bioactivity and stimulate a biosynthetic response in rBMSCs.
  • DCC encapsulation appears more effective than surface coating for enhancing cell performance.
  • While promising for cartilage regeneration, further studies are needed to conclusively demonstrate chondroinductivity.