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Related Experiment Videos

Lysozyme synthesis in osteoclasts.

T J Hilliard1, G Meadows, A J Kahn

  • 1Cardinal Glennon Children's Hospital, MO.

Journal of Bone and Mineral Research : the Official Journal of the American Society for Bone and Mineral Research
|December 1, 1990
PubMed
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Osteoclasts, the cells responsible for bone resorption, synthesize abundant lysozyme, an enzyme typically found in monocytes and macrophages. This finding supports the monocyte-macrophage origin of osteoclasts but leaves the enzyme

Area of Science:

  • Cell Biology
  • Immunology
  • Bone Biology

Background:

  • Osteoclasts share common features with monocytes and macrophages.
  • Lysozyme is a key enzyme produced by monocytes and macrophages.

Purpose of the Study:

  • To investigate lysozyme synthesis in chicken osteoclasts.
  • To compare lysozyme levels in osteoclasts and macrophages.

Main Methods:

  • Assessed lysozyme synthesis in freshly isolated and in situ chicken osteoclasts.
  • Measured messenger RNA (mRNA) levels for lysozyme in osteoclasts and marrow macrophages at various in vitro maturation stages.

Main Results:

  • Chicken osteoclasts contain abundant lysozyme and high lysozyme mRNA levels.

Related Experiment Videos

  • Marrow macrophages possess lower lysozyme mRNA levels (2-4 times less) compared to osteoclasts.

    • Conclusions:

    • The findings reaffirm the monocyte-macrophage origin of osteoclasts.
    • The specific function of lysozyme in osteoclast activity remains to be elucidated.