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Updated: Jun 14, 2026

Integrated Bone Formation Through In Vivo Endochondral Ossification Using Mesenchymal Stem Cells
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Harnessing the purinergic receptor pathway to develop functional engineered cartilage constructs.

S D Waldman1, J Usprech, L E Flynn

  • 1Department of Mechanical and Materials Engineering, Queen's University, Kingston, Ontario, Canada. waldman@me.queensu.ca

Osteoarthritis and Cartilage
|March 30, 2010
PubMed
Summary
This summary is machine-generated.

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Stimulating cartilage cells with adenosine 5'-triphosphate (ATP) significantly boosted tissue growth and mechanical strength without causing inflammation. However, high ATP doses may trigger a catabolic response, requiring careful dosage control.

Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Cell Biology

Background:

  • Mechanical stimulation is common in cartilage tissue engineering.
  • Mechanotransduction pathways offer a more targeted approach.
  • The purinergic receptor pathway is a key target for mechanotransduction.

Purpose of the Study:

  • To investigate the effect of adenosine 5 '-triphosphate (ATP) on cartilage tissue engineering.
  • To assess purinergic receptor pathway stimulation in the absence of mechanical forces.
  • To evaluate ATP's impact on chondrocyte biosynthesis, matrix accumulation, and mechanical properties.

Main Methods:

  • Bovine articular chondrocytes were cultured in 3D with varying ATP doses for 4 weeks.
  • Biosynthesis, extracellular matrix accumulation, and mechanical properties were measured.

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  • Potential adverse effects including inflammation, matrix turnover, and mineralization were assessed.

    • Main Results:

    • ATP supplementation (62.5-250 microM) increased chondrocyte biosynthesis by 80-120%.
    • Matrix accumulation (collagen, proteoglycans) and mechanical properties (indentation modulus) significantly improved.
    • No significant inflammatory response or mineralization was observed, but high ATP doses (250 microM) increased matrix metalloproteinase-13 expression.

    Conclusions:

    • Stimulating the ATP-purinergic receptor pathway effectively enhances cartilage tissue formation and mechanical function.
    • Controlled ATP dosage is crucial to prevent potential catabolic responses.
    • This pathway presents a promising alternative to mechanical stimulation in cartilage tissue engineering.