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Related Experiment Videos

Origin of human bone marrow fibroblasts

D W Golde, W G Hocking, S G Quan

    British Journal of Haematology
    |February 1, 1980
    PubMed
    Summary

    Bone marrow fibroblasts in transplant patients were found to be of recipient origin, not donor. This indicates these mesenchymal cells are distinct from hematopoietic stem cells.

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    Area of Science:

    • Hematology
    • Cell Biology
    • Transplantation Immunology

    Background:

    • The cellular origins of stromal cells within the bone marrow are not fully elucidated.
    • Understanding fibroblast lineage is crucial for bone marrow transplantation success and regenerative medicine.

    Purpose of the Study:

    • To determine the origin of bone marrow fibroblasts in patients undergoing allogeneic bone marrow transplantation.
    • To investigate whether bone marrow fibroblasts share a common precursor with hematopoietic or lymphoid cells.

    Main Methods:

    • Bone marrow cells from three transplant recipients (opposite sex donors) were cultured in vitro.
    • Adherent cells were passaged, and their morphology and sex chromosomes were analyzed.
    • Hematopoietic cells and lymphocytes were simultaneously analyzed for donor/recipient origin.

    Main Results:

    • Cultured bone marrow fibroblasts consistently exhibited recipient sex chromosome type.
    • Hematopoietic cells and lymphocytes demonstrated donor sex chromosome type, confirming successful engraftment.
    • Fibroblast cultures showed typical fibroblast morphology and growth patterns post-transplantation.

    Conclusions:

    • Human bone marrow fibroblasts are not derived from the same hematopoietic stem cell precursors as blood cells.
    • Bone marrow fibroblasts are likely mesenchymal in origin and radioresistant.
    • These findings suggest fibroblasts are independent stromal components in the bone marrow microenvironment.

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