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Related Experiment Videos

Characterization of a stimulating factor released by immunosuppression.

F Scheiffarth, H W Baenkler, A Zehentner

    Zeitschrift Fur Immunitatsforschung, Experimentelle Und Klinische Immunologie
    |July 1, 1975
    PubMed
    Summary

    Researchers identified a soluble stimulating factor (SF) in mice treated with cyclophosphamide. This factor, with a molecular weight over 20,000, enhances antibody production during immunosuppression, offering insights into immune response mechanisms.

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    Area of Science:

    • Immunology
    • Pharmacology

    Background:

    • Immunosuppression can impair the immune response.
    • Understanding mechanisms to stimulate immune responses during immunosuppression is crucial.

    Purpose of the Study:

    • To investigate the mechanism of immune response stimulation during cyclophosphamide-induced immunosuppression.
    • To characterize the nature of the identified stimulating factor (SF).

    Main Methods:

    • NMRI mice were treated with cyclophosphamide.
    • Serum was collected 48 hours post-treatment to isolate stimulating factor (SF).
    • SF was characterized using centrifugation, dialysis, and salt-fractionation.
    • Antibody production was assessed via plaque-forming cell counts in spleens after sensitization with sheep red blood cells (SRBC).

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    Main Results:

    • A soluble stimulating factor (SF) was detected in the serum of cyclophosphamide-treated mice.
    • SF enhanced antibody production, as evidenced by increased plaque-forming cells.
    • The molecular weight of SF was determined to be greater than 20,000.
    • SF was confirmed not to be an immunoglobulin.

    Conclusions:

    • A non-immunoglobulin soluble factor (SF) with a molecular weight >20,000 is released following cyclophosphamide treatment.
    • This SF can stimulate antibody production, suggesting a potential mechanism for modulating immune responses during immunosuppression.