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Abnormal erythroid progenitor cells in human preleukemia

D H Chui, B J Clarke

    Blood
    |August 1, 1982
    PubMed
    Summary
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    Preleukemia patients show significantly reduced or defective erythroid progenitor cells (BFU-E) in blood and marrow. This suggests impaired red blood cell development in early stages of preleukemia.

    Area of Science:

    • Hematology
    • Oncology
    • Cell Biology

    Background:

    • Preleukemia, a precursor to acute myeloid leukemia, is characterized by hematopoietic abnormalities.
    • Erythroid progenitor cells, specifically BFU-E (burst-forming unit-erythroid), are crucial for red blood cell development.

    Purpose of the Study:

    • To investigate the number and function of erythroid progenitor cells (BFU-E) in patients with preleukemia.
    • To determine if defects in BFU-E contribute to the pathophysiology of preleukemia.

    Main Methods:

    • Erythroid cell clonal culture technique was employed.
    • Peripheral blood and bone marrow cells from ten preleukemia patients were cultured in vitro.
    • BFU-E derived erythroid colonies were quantified and assessed for proliferative and differentiative capacities.

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    Main Results:

    • Nine out of ten patients showed no observable erythroid colonies derived from peripheral blood BFU-E.
    • One patient exhibited markedly decreased peripheral blood BFU-E derived erythroid colonies.
    • In three patients, bone marrow cultures also failed to detect BFU-E derived erythroid colonies.

    Conclusions:

    • Patients with preleukemia have a significant deficit in functional erythroid progenitor cells (BFU-E).
    • BFU-E cells in preleukemia are either markedly reduced in number or possess defective proliferation/differentiation capabilities.
    • These findings highlight impaired erythropoiesis as a key feature in the preleukemic state.