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Related Experiment Videos

Decorin modulates matrix mineralization in vitro.

Yoshiyuki Mochida1, Wagner R Duarte, Hideki Tanzawa

  • 1CB#7455, Dental Research Center, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7455, USA.

Biochemical and Biophysical Research Communications
|May 7, 2003
PubMed
Summary

Decorin (DCN) regulates bone mineralization. Higher DCN levels delay mineralization, while lower levels accelerate it, suggesting DCN inhibits collagen matrix mineralization timing.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Biomineralization

Background:

  • Decorin (DCN) is a small leucine-rich proteoglycan.
  • DCN is known to modulate collagen fibrillogenesis.

Purpose of the Study:

  • To investigate the role of DCN in collagen matrix mineralization.
  • To characterize the effects of altered DCN levels on osteoblastic cells.

Main Methods:

  • Generated stable osteoblastic cell clones with higher (sense-DCN, S-DCN) and lower (antisense-DCN, As-DCN) DCN expression.
  • Characterized mineralized nodule formation in these cell clones.

Main Results:

  • Mineralization onset was significantly delayed in S-DCN clones compared to controls.
  • Mineralization was markedly accelerated and nodule number increased in As-DCN clones.
Keywords:
NASA Discipline MusculoskeletalNon-NASA Center

Related Experiment Videos

  • DCN synthesis levels were inversely correlated with mineralization timing; cell proliferation and differentiation were unaffected.

    • Conclusions:

    • DCN acts as an inhibitor of collagen matrix mineralization.
    • DCN modulates the timing of matrix mineralization in osteoblastic cells.