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Related Experiment Videos

Bone marrow: the bursa equivalent in man?

N I Abdou, N L Abdou

    Science (New York, N.Y.)
    |January 28, 1972
    PubMed
    Summary

    Human bone marrow contains cells of the bursal-dependent system, indicated by responses to pokeweed and immunoglobulin antiserum. These cells are crucial for immune responses, unlike thymus-dependent cells.

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    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Human bone marrow lymphoid cells play a critical role in the immune system.
    • Understanding the distinct functional capacities of lymphoid cell subsets is essential for diagnosing and treating immunodeficiencies.

    Purpose of the Study:

    • To investigate the presence and function of thymus-dependent and bursal-dependent lymphoid cells within human bone marrow.
    • To differentiate the roles of these cell types in immune responses using specific mitogens and antisera.

    Main Methods:

    • In vitro stimulation of human bone marrow lymphoid cells and leukocytes from patients with X-linked agammaglobulinemia.
    • Assessing cellular responses to pokeweed mitogen, antiserum to immunoglobulin, and phytohemagglutinin.

    Main Results:

    • Bone marrow lymphoid cells, especially plasma cell-rich populations (e.g., in multiple myeloma), responded to pokeweed mitogen and antiserum to immunoglobulin, but not phytohemagglutinin.
    • Cells from patients with bursal-deficient X-linked agammaglobulinemia showed no response to pokeweed or immunoglobulin antiserum, but normal response to phytohemagglutinin.
    • Leukocytes from agammaglobulinemia patients responded normally to phytohemagglutinin, indicating functional thymus-dependent cells.

    Conclusions:

    • The in vitro response to phytohemagglutinin serves as an index for the thymus-dependent system.
    • The in vitro response to antiserum to immunoglobulin and pokeweed acts as an index for the bursal-dependent system.
    • Human bone marrow harbors bursal cells but likely contains very few, if any, thymus cells.

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