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T cell lines active in the delayed-type hypersensitivity reaction (DTH)

S Weiss, G Dennert

    Journal of Immunology (Baltimore, Md. : 1950)
    |May 1, 1981
    PubMed
    Summary
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    Two T cell lines, one cytolytic and one noncytolytic, effectively induced delayed-type hypersensitivity (DTH) reactions. These reactions showed no H-2 restriction, even with tumor cells, highlighting T cell receptor specificity in DTH.

    Area of Science:

    • Immunology
    • Cellular immunology
    • T cell biology

    Background:

    • Delayed-type hypersensitivity (DTH) is a crucial T cell-mediated immune response.
    • Understanding the specific requirements for DTH induction is vital for immune modulation and therapy.

    Purpose of the Study:

    • To investigate the capacity of allospecific T cell lines to elicit DTH reactions in vivo.
    • To determine the characteristics and restrictions of DTH reactions induced by defined T cell lines.

    Main Methods:

    • Assaying two allospecific uncloned T cell lines (C.C3.11.75 and B6-C.7.76) for DTH induction in vivo.
    • Analyzing the tempo and histology of the elicited DTH reactions.
    • Investigating H-2 restriction by using allogeneic hosts and tumor cells expressing specific antigens.

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    Main Results:

    • Both cytolytic and noncytolytic T cell lines evoked strong DTH reactions, typical in tempo and histology.
    • The reactions recognized private specificity encoded in the H-2 IA subregion.
    • DTH reactions showed a complete lack of H-2 restriction in allogeneic hosts, even without macrophages, and were inducible with tumor cells.

    Conclusions:

    • Allospecific T cell lines can effectively induce DTH reactions.
    • DTH reactions mediated by these lines are not restricted by H-2 compatibility, suggesting T cell receptor specificity is dominant.
    • Responder cell proliferation and host T cell recruitment are not critical for this type of DTH reaction.