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Stromal cell-associated erythropoiesis.

S Tsai, C A Sieff, D G Nathan

    Blood
    |May 1, 1986
    PubMed
    Summary

    A novel culture system demonstrates that human stromal cells support erythropoiesis. Stromal cells and erythropoietin promote the development of red blood cells from primitive progenitors.

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    Area of Science:

    • Hematology
    • Cell Biology
    • Developmental Biology

    Background:

    • Stromal cells play a crucial role in hematopoiesis, particularly erythropoiesis.
    • Understanding the functional roles of stromal cells in blood formation is essential for regenerative medicine and disease research.

    Purpose of the Study:

    • To design and validate a novel cover slip-transfer culture system for studying stromal cell function in erythropoiesis.
    • To investigate the capacity of human bone marrow stromal cells (ST-1 strain) to support erythroid development in the presence of erythropoietin and serum proteins.

    Main Methods:

    • Development of a cover slip-transfer culture system using human bone marrow stromal cell colonies.
    • Culture of human bone marrow cells on ST-1 stromal cell monolayers grown on cover slips.
    • Transfer of cover slips to new dishes and overlay with methylcellulose culture medium containing erythropoietin and fetal calf serum.

    Main Results:

    • Large erythroid bursts, comprising multiple subcolonies, developed on stromal cells without exogenous colony-stimulating factors other than erythropoietin.
    • Primitive erythroid progenitors migrated extensively on and within the stroma, forming large colonies of hemoglobinized erythroblasts that enucleated.
    • Erythroid progenitors adhered to and migrated on the extracellular matrix produced by ST-1 cells, showing greater adherence than more mature cells or myeloid progenitors.

    Conclusions:

    • Human stromal cell strain ST-1, along with serum proteins and erythropoietin, effectively supports the development of large erythroid bursts.
    • Erythroid progenitors exhibit significant adherence to and migration on the extracellular matrix of ST-1 cells, indicating a crucial interaction in erythropoiesis.
    • The developed culture system provides a valuable tool for dissecting the intricate mechanisms of stromal cell-mediated hematopoiesis, especially erythropoiesis.

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