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Related Experiment Videos

Osteoclasts derived from haematopoietic stem cells

P Ash, J F Loutit, K M Townsend

    Nature
    |February 14, 1980
    PubMed
    Summary
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    The multinucleated osteoclast originates from hematopoietic stem cells, not osteogenic precursors. Direct evidence confirms this using a natural cytoplasmic cell marker in radiation chimeras.

    Area of Science:

    • Cell Biology
    • Hematology
    • Osteoclastogenesis

    Background:

    • The cellular origin of multinucleated osteoclasts remains debated.
    • Osteogenic precursors and hematopoietic stem cells are proposed origins.
    • Previous evidence for hematopoietic stem cell origin is persuasive but indirect.

    Purpose of the Study:

    • To provide direct evidence for the origin of multinucleated osteoclasts.
    • To investigate the role of hematopoietic stem cells in osteoclast formation.

    Main Methods:

    • Utilized radiation chimeras to track cell lineage.
    • Employed a natural cytoplasmic cell marker for identification.
    • Analyzed cell populations derived from donated hematopoietic stem cells.

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    Main Results:

    • Demonstrated that the cytoplasmic marker, originating from donated hematopoietic stem cells, is present in multinucleated osteoclasts.
    • Provided direct evidence linking hematopoietic stem cells to osteoclast formation.

    Conclusions:

    • Multinucleated osteoclasts are derived from hematopoietic stem cells.
    • This finding resolves the controversy regarding osteoclast origins.