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Related Experiment Videos

Alteration in suppressor cell activity in chronic active hepatitis.

H J Hodgson, J R Wands, K J Isselbacher

    Proceedings of the National Academy of Sciences of the United States of America
    |March 1, 1978
    PubMed
    Summary

    Patients with chronic active hepatitis show a defect in concanavalin A-stimulated suppressor cells. This immune system abnormality was observed in both acute and chronic hepatitis patients, unlike controls.

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    Area of Science:

    • Immunology
    • Hepatology
    • Cellular Biology

    Background:

    • Chronic active hepatitis involves complex immune responses.
    • Suppressor cells play a crucial role in regulating immune activity.
    • Defects in immune regulation may contribute to chronic liver disease pathogenesis.

    Purpose of the Study:

    • To investigate concanavalin A-induced suppressor cell activity in patients with chronic active hepatitis.
    • To compare suppressor cell function in chronic active hepatitis with acute hepatitis and other inflammatory conditions.
    • To determine if liver injury extent correlates with suppressor cell abnormalities.

    Main Methods:

    • Peripheral blood mononuclear cells were isolated from 24 chronic active hepatitis patients and controls.
    • Suppressor cells were generated using concanavalin A (conA) stimulation followed by mitomycin C treatment.

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  • Suppressor cell activity was assessed by measuring inhibition of conA-stimulated allogeneic lymphocyte blastogenesis.

    • Main Results:

    • A significant defect in concanavalin A-stimulated suppressor cell activity was observed in most chronic active hepatitis patients (P < 0.001).
    • This defect was present regardless of disease remission status, prednisone therapy, or relapse.
    • No correlation was found between the extent of liver injury and the measured suppressor cell activity.

    Conclusions:

    • Patients with chronic active hepatitis exhibit a functional defect in concanavalin A-stimulated suppressor cells.
    • This immunoregulatory abnormality may be implicated in the pathogenesis of chronic active hepatitis.
    • The findings highlight a potential role for immune dysregulation in the host's response to chronic liver disease.