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Related Experiment Videos

Changes in cell surface antigen expression during hemopoietic differentiation.

C Sieff, D Bicknell, G Caine

    Blood
    |September 1, 1982
    PubMed
    Summary
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    This study maps antigen expression on human bone marrow cells during differentiation. Monoclonal antibodies reveal patterns of cell surface markers, aiding in understanding hematopoietic progenitor cell development and isolation.

    Area of Science:

    • Hematology
    • Immunology
    • Cell Biology

    Background:

    • Hematopoiesis involves complex differentiation of progenitor cells.
    • Understanding cell surface antigen expression is crucial for characterizing these populations.
    • Monoclonal antibodies offer precise tools for identifying cell subsets.

    Purpose of the Study:

    • To map the expression patterns of various antigens on human hematopoietic progenitor and precursor cells.
    • To investigate the role of specific antigens, like OKT10 and DC1, in hematopoietic differentiation.
    • To explore the potential of transferrin receptor expression for isolating erythroid progenitors.

    Main Methods:

    • Human bone marrow cells were analyzed using fluorescence-activated cell sorting (FACS).
    • Cells were stained with monoclonal antibodies targeting blood group, HLA-associated, lineage-specific, and transferrin receptor antigens.

    Related Experiment Videos

  • Sorted cell populations were cloned to assess erythroid (BFU-E, CFU-E) and myeloid (CFU-GM) progenitor activity.

    • Main Results:

    • Established detailed antigen expression profiles across hematopoietic differentiation stages.
    • Identified OKT10 antigen as present on early progenitors and decreasing with differentiation.
    • Observed transferrin receptor expression predominantly on erythroid progenitors, with weak presence on myeloid progenitors.
    • Found HLA-linked DC1 determinant absent on progenitor cells, unlike HLA-DR.

    Conclusions:

    • Antigen expression patterns provide a detailed map of human hematopoietic differentiation.
    • OKT10 and transferrin receptor show potential roles in regulating differentiation and isolating specific progenitor populations.
    • These findings contribute to a deeper understanding of normal hematopoiesis and may inform future cell-based therapies.