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Peripheral blood lymphocyte distribution in scleroderma

F J Carapeto, R K Winkelmann

    Dermatologica
    |January 1, 1975
    PubMed
    Summary
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    Mesenchymal scleroderma shows increased B cells and decreased T cells in peripheral blood. This finding, alongside elevated antibodies, suggests a humoral immunity disturbance in this autoimmune condition.

    Area of Science:

    • Immunology
    • Rheumatology
    • Hematology

    Background:

    • Connective tissue diseases involve complex immune dysregulation.
    • Peripheral blood lymphocyte populations, specifically T and B cells, are crucial indicators of immune status.
    • Understanding lymphocyte dynamics in scleroderma subtypes is essential for diagnosis and management.

    Purpose of the Study:

    • To investigate peripheral blood T and B lymphocyte counts in patients with progressive systemic scleroderma, dermatomyositis, and inflammatory/mesenchymal scleroderma.
    • To correlate lymphocyte subset changes with clinical and serological markers of disease activity.
    • To assess the diagnostic utility of B lymphocyte determination in identifying immune disturbances.

    Main Methods:

    • Peripheral blood samples were collected from patients diagnosed with specific connective tissue diseases.

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  • Flow cytometry or similar techniques were used to quantify T and B lymphocyte populations.
  • Serological markers (immunoglobulins, autoantibodies) and skin immunofluorescence were analyzed.

    • Main Results:

    • Mesenchymal scleroderma exhibited a significant increase in peripheral B cells and a decrease in T cells.
    • Progressive systemic scleroderma and dermatomyositis showed T cell depression without consistent B cell changes.
    • Elevated B cells correlated with increased immunoglobulins, autoantibodies (antinuclear, antiribonucleoprotein), and positive skin immunofluorescence.

    Conclusions:

    • A distinct peripheral B lymphocyte increase, coupled with T cell reduction, characterizes mesenchymal scleroderma.
    • These findings indicate a significant disturbance in humoral immunity in mesenchymal scleroderma.
    • B lymphocyte quantification serves as a valuable biomarker for assessing immune alterations in scleroderma patients.