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Related Experiment Videos

Injectable tissue-engineered cartilage with different chondrocyte sources.

Jian-Wei Xu1, Victor Zaporojan, Giuseppe M Peretti

  • 1Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, 02114, USA.

Plastic and Reconstructive Surgery
|April 3, 2004
PubMed
Summary
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Injectable engineered cartilage using swine chondrocytes shows potential for craniofacial reconstruction. Costal chondrocytes yielded stable, superior neocartilage, unlike auricular or articular sources.

Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Injectable engineered cartilage offers minimally invasive solutions for craniofacial irregularities.
  • Predictable shape and volume maintenance are crucial for successful recontouring.

Purpose of the Study:

  • To investigate the impact of different swine chondrocyte sources (auricular, costal, articular) on injectable cartilage construct properties.
  • To evaluate the dimensional stability, mass, and biomechanical characteristics of engineered cartilage over time.

Main Methods:

  • Chondrocytes from swine auricular, costal, and articular cartilage were isolated and encapsulated in fibrin polymer.
  • Constructs were implanted in nude mice for 4, 8, and 12 weeks, with subsequent dimensional, mass, histological, biochemical, and biomechanical analyses.

Related Experiment Videos

  • Key metrics included dimensional/mass ratios, modulus, glycosaminoglycan content, permeability, and water content.

    • Main Results:

    • All groups synthesized new cartilaginous matrix.
    • Auricular chondrocyte constructs showed 20-30% size increase, costal constructs remained stable, and articular constructs decreased by 40-50% at 12 weeks.
    • Costal and auricular chondrocyte constructs exhibited superior biomechanical properties and glycosaminoglycan content compared to articular chondrocyte constructs.

    Conclusions:

    • Injectable cartilage can be engineered from different chondrocyte sources, yielding neocartilage with distinct properties.
    • Costal chondrocyte-derived cartilage demonstrated stability and favorable biomechanical characteristics, making it a promising candidate for craniofacial tissue engineering.
    • Articular chondrocyte constructs were unstable, while auricular constructs showed overgrowth, highlighting the importance of cell source selection.