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Related Experiment Videos

Autoantibody against B lymphocytes

M S Park, P I Terasaki, D Bernoco

    Lancet (London, England)
    |September 3, 1977
    PubMed
    Summary
    This summary is machine-generated.

    A significant percentage of individuals possess natural autoantibodies that target their own B lymphocytes. These B-cell autoantibodies, identified under specific cold conditions, may play a role in regulating immune responses.

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    Area of Science:

    • Immunology
    • Cell Biology
    • Transplantation Immunology

    Background:

    • Natural autoantibodies can be present in healthy individuals.
    • B lymphocytes play a crucial role in the adaptive immune system.
    • Understanding B-cell specific antibodies is important for transplantation and immune regulation.

    Purpose of the Study:

    • To investigate the presence and characteristics of autoantibodies targeting B lymphocytes in normal individuals.
    • To determine the optimal conditions for detecting these B-cell autoantibodies.
    • To explore the potential implications of these findings for kidney transplantation and immune regulation.

    Main Methods:

    • Sera from 99 healthy males and females were tested for cytotoxic activity against autologous and allogeneic B lymphocytes.

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  • Flow cytometry or similar techniques were likely used to identify B and T lymphocytes.
  • Incubation temperatures for serum and complement were varied to determine optimal killing conditions.

    • Main Results:

    • 20% of sera exhibited specific cytotoxicity against B lymphocytes, not T lymphocytes.
    • These autoantibodies also killed allogeneic B lymphocytes.
    • Maximal B-lymphocyte killing occurred at 5°C serum incubation and 20°C complement incubation, with some reactivity up to a 1/16 dilution.
    • Positive B-lymphocyte crossmatches in kidney transplantation may not reflect alloantibodies.

    Conclusions:

    • Normal individuals can possess B-cell autoantibodies that are cytotoxic to their own and other individuals' B lymphocytes.
    • The optimal detection conditions involve cold temperatures.
    • These findings suggest that B-cell autoantibodies might be misidentified as alloantibodies in transplantation crossmatches and could have a role in immune autoregulation.