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Lymphocyte subsets in normal human lymphoid tissues.

S M Hsu, J Cossman, E S Jaffe

    American Journal of Clinical Pathology
    |July 1, 1983
    PubMed
    Summary
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    This study maps immune cell locations in human lymphoid tissues using monoclonal antibodies. It reveals distinct distributions of T cells, B cells, and natural killer (NK) cells, highlighting their roles in immune regulation.

    Area of Science:

    • Immunology
    • Cell Biology
    • Histology

    Background:

    • Lymphocyte subpopulations play critical roles in immune responses.
    • Understanding the precise localization of these cells within lymphoid tissues is essential for comprehending immune function.

    Purpose of the Study:

    • To determine the tissue-specific localization of B cells, T cells, natural killer (NK) cells, and monocytes in human lymph nodes, spleen, tonsils, and thymus.
    • To correlate cell distribution patterns with their potential roles in immune regulation.

    Main Methods:

    • Immunohistochemical techniques were employed on frozen tissue sections.
    • A panel of monoclonal antibodies specific for lymphocyte subpopulations (B, T, NK, monocyte) was utilized.

    Main Results:

    Related Experiment Videos

    • Distinct staining patterns were observed for different lymphocyte subsets across various lymphoid organs.
    • Thymocytes showed differential expression of T cell markers (Leu 1, 2a, 3a, 4, Lyt 3, OKT3, OKT6).
    • Peripheral T cells (Leu 1, 4, OKT3, Lyt 3 positive) were localized in lymph node paracortex and spleen periarteriolar sheaths.
    • B cells (IgM, IgD, B1 positive) were identified in lymphoid follicle mantle zones.
    • Natural killer (NK) cells (Leu 7 positive) were frequent in germinal centers and spleen red pulp, with distinct distribution from T cells.

    Conclusions:

    • The study provides a detailed map of immune cell distribution in human lymphoid tissues.
    • The findings support the involvement of specific lymphocyte subsets (e.g., Leu 3a+, Leu 7+ cells) in immune regulation.
    • Differential localization suggests specialized functions for lymphocyte subpopulations within different microenvironments.