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[Origin of bone cells (author's transl)]

M C de Vernejoul

    La Nouvelle Presse Medicale
    |January 23, 1982
    PubMed
    Summary

    Osteoclasts originate from hematopoietic stem cells, while osteoblasts derive from the medullary stroma. Bone marrow transplantation offers a surprising cure for human osteopetrosis, highlighting a key therapeutic avenue.

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    Area of Science:

    • Bone biology and hematopoiesis.
    • Cell lineage and differentiation.
    • Skeletal physiology.

    Context:

    • Osteoclasts, responsible for bone resorption, are derived from hematopoietic stem cells and share lineage with monocytes.
    • Osteoblasts, responsible for bone formation, originate from the medullary stroma and belong to the fibroblastic lineage.
    • The exact physiological mechanisms governing bone resorption and formation remain incompletely understood.

    Purpose:

    • To elucidate the cellular origins and lineage relationships of osteoclasts and osteoblasts.
    • To explore the physiological mechanisms of bone remodeling.
    • To investigate potential therapeutic applications based on bone cell biology.

    Summary:

    • Established that osteoclasts are derived from hematopoietic stem cells (HSCs), closely related to monocytes.
    • Identified osteoblasts as originating from the medullary stroma, belonging to the fibroblastic lineage.
    • Demonstrated that grafts of hematopoietic bone marrow can cure human osteopetrosis, revealing a significant therapeutic outcome.

    Impact:

    • Provides critical insights into the distinct cellular origins of bone-resorbing and bone-forming cells.
    • Uncovers a novel therapeutic strategy for osteopetrosis through hematopoietic stem cell transplantation.
    • Opens new avenues for research into bone diseases and regenerative medicine.

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