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Sarcoid lymphocytes: B- and T-cell quantitation

Y P Kataria, A F LoBuglio, P A Bromberg

    Annals of the New York Academy of Sciences
    |January 1, 1976
    PubMed
    Summary

    Sarcoidosis patients exhibit reduced T-cell numbers and lymphopenia. Disseminated disease shows elevated immunoglobulin-bearing B lymphocytes, suggesting immune complex involvement.

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    Area of Science:

    • Immunology
    • Hematology
    • Clinical Medicine

    Background:

    • Sarcoidosis is an inflammatory disease characterized by granuloma formation.
    • Immune system dysregulation, particularly involving lymphocytes, is implicated in sarcoidosis pathogenesis.

    Purpose of the Study:

    • To quantify B and T lymphocytes in sarcoidosis patients.
    • To investigate correlations between lymphocyte counts and disease status or anergy.

    Main Methods:

    • Quantification of B lymphocytes using surface immunoglobulins (IgG, IgM, IgA) and complement receptors.
    • Quantification of T lymphocytes via E-rosette assay.
    • Analysis of lymphocyte counts in relation to sarcoidosis extent and cutaneous anergy.

    Main Results:

    • Untreated sarcoidosis patients showed lymphopenia, reduced T-cells, and low E/Ig cell ratios.
    • Elevated numbers of immunoglobulin-bearing lymphocytes (IgG, IgM, IgA) were observed in disseminated sarcoidosis.
    • No correlation was found between T-lymphocyte counts and cutaneous anergy.
    • Complement receptor lymphocytes remained normal across all patient groups.

    Conclusions:

    • Sarcoidosis is associated with T-cell depletion and an increase in immunoglobulin-bearing B lymphocytes, particularly in disseminated disease.
    • Elevated immunoglobulin/Ig ratios suggest the potential binding of antibody or antigen-antibody complexes to lymphocytes.
    • Mechanisms underlying T-cell depletion and increased immunoglobulin-bearing cells require further investigation.

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