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Related Experiment Videos

Specificity and function of a human autologous reactive T cell.

P B Hausman, J D Stobo

    The Journal of Experimental Medicine
    |June 1, 1979
    PubMed
    Summary

    Autologous reactive T cells (ARC) in human blood proliferate when stimulated by B cells and monocytes. These ARC cells, linked to HLA-DR genes, function as helper cells crucial for immunoglobulin synthesis.

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    Area of Science:

    • Immunology
    • Human T cell biology
    • HLA genetics

    Background:

    • Normal human peripheral blood contains T cells, termed autologous reactive cells (ARC), that proliferate in response to autologous B cells and monocytes.
    • Previous research suggests a role for T cells in immune responses, but the specific functions and genetic associations of ARC populations require further elucidation.

    Purpose of the Study:

    • To investigate the functional characteristics and genetic linkage of autologous reactive T cells (ARC).
    • To determine if ARC populations possess helper activity essential for B cell immunoglobulin synthesis.

    Main Methods:

    • Selective cell suicide using 5-bromo-2-deoxyuridine and light to eliminate proliferating ARC.
    • Density-gradient fractionation of T cells to isolate ARC-enriched and ARC-depleted populations.
    • Assessment of helper activity in B cell immunoglobulin synthesis assays.

    Main Results:

    • Proliferating ARC responded to signals primarily linked to the HLA-DR locus, more so than HLA-A or HLA-B loci.
    • T cell populations enriched for ARC reactivity also showed enhanced helper activity for B cell Ig synthesis.
    • T cell populations depleted of proliferating ARC exhibited deficient helper activity.

    Conclusions:

    • Autologous reactive T cells (ARC) are responsive to signals encoded by genes closely associated with the HLA-DR locus.
    • ARC populations can function as helper T cells, playing a critical role in autologous B cell immunoglobulin production.

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