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Related Experiment Videos

Allospecific T-cell lines with functional activities.

Yeh Ming, A A Czitrom, N A Mitchison

    Immunology
    |June 1, 1982
    PubMed
    Summary

    This study shows that T-lymphocyte sublines recognize specific alloantigens and provide helper activity. In vitro selection enhances their functional activity compared to in vivo methods.

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    Molecular immunology·2009

    Area of Science:

    • Immunology
    • Cellular immunology
    • T-cell biology

    Background:

    • T-lymphocytes play a crucial role in adaptive immunity.
    • Major Histocompatibility Complex (MHC) molecules are key in immune recognition.
    • Class II MHC alloantigens are involved in T-cell activation and regulation.

    Purpose of the Study:

    • To investigate the proliferative responses and helper activity of T-lymphocyte lines and sublines reactive with Class II MHC alloantigens.
    • To compare the efficacy of in vitro versus in vivo selection methods for enhancing T-cell function.
    • To analyze the specificity of T-cell recognition towards different MHC molecules.

    Main Methods:

    • Establishment and characterization of T-lymphocyte lines and sublines.
    • In vitro and in vivo assays for proliferative responses.
    • Functional helper assays assessing regulatory activity on B cells.
    • Differential analysis of subline responses against various MHC backgrounds.

    Main Results:

    • Both parent T-lymphocyte lines and sublines recognize I-A subregion determinants of the H-2 complex.
    • These cells exhibit regulatory activity for allogeneic and syngeneic B cells.
    • In vitro selected cell populations demonstrated approximately twenty-fold higher activity in helper assays compared to in vivo primed populations.
    • A subset of selected cells showed preferential reactivity to MHC molecules presented on their selection background.

    Conclusions:

    • T-lymphocyte lines and sublines reactive to Class II MHC alloantigens possess significant proliferative and helper functions.
    • In vitro selection is a more effective method for enhancing T-cell helper activity than in vivo priming.
    • T-cell recognition of MHC molecules can be specific to the presenting genetic background.

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