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Related Experiment Videos

Immunoglobulin synthesis by thymus B cells.

P Jentz, C T Chou, I Szymanska

    Immunology
    |October 1, 1979
    PubMed
    Summary

    Newborn rabbits receiving lymphoid cells synthesized donor immunoglobulin, primarily through B cells. Thymus-derived B cells showed significantly higher immunoglobulin synthesis capacity compared to spleen, lymph node, or appendix B cells.

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    Area of Science:

    • Immunology
    • Cell Biology

    Background:

    • Lymphoid cell transfer in newborn recipients can lead to donor-type immunoglobulin synthesis.
    • Understanding the specific cell types and their origins responsible for immunoglobulin production is crucial in immunology.

    Purpose of the Study:

    • To investigate the role of T cells and B cells in donor-type immunoglobulin synthesis after transfer to newborn rabbits.
    • To compare the immunoglobulin synthetic capacity of B cells originating from different lymphoid tissues (thymus, spleen, mesenteric lymph nodes, appendix).

    Main Methods:

    • Transfer of rabbit lymphoid cells into newborn recipients.
    • Selective elimination of T cells or B cells from the transferred lymphoid cell population.
    • Quantification of donor-type immunoglobulin synthesis in recipients.

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  • Comparison of immunoglobulin half-lives in recipient sera to assess synthetic activity duration.
  • Dose-response analysis of spleen and thymus cell transfer on immunoglobulin synthesis.

    • Main Results:

    • Elimination of T cells did not impact donor immunoglobulin synthesis, while B cell elimination abolished or significantly reduced it, highlighting B cells as the primary synthesizers.
    • B cells from the thymus exhibited substantially higher synthetic capacity (34-180 times greater) than those from spleen, mesenteric lymph nodes, and appendix.
    • Synthetic activity of spleen cells diminished by day 10 post-transfer, whereas thymus cells maintained synthesis longer.
    • Donor immunoglobulin levels increased proportionally with spleen cell numbers up to 120 x 10(6) cells.
    • Thymus cell transfer showed increased immunoglobulin synthesis up to 2 x 10(7) cells, with no further increase at higher doses.

    Conclusions:

    • B cells are the principal mediators of donor-type immunoglobulin synthesis in this model.
    • Thymus-derived B cells possess a superior capacity for immunoglobulin synthesis compared to B cells from peripheral lymphoid organs.
    • The duration and dose-dependency of immunoglobulin synthesis vary based on the origin and number of transferred lymphoid cells.