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Related Experiment Videos

Conditioned immunosuppression in orally immunized mice

E F Morato1, M Gerbase-DeLima, R M Gorczynski

  • 1Department of Microbiologia, Imunologia and Parasitologia, Universidade Federal de Santa Catarina, Brazil.

Brain, Behavior, and Immunity
|March 1, 1996
PubMed
Summary

Mice pretreated with cyclophosphamide and chocolate milk (CHM) showed suppressed antibody formation. This conditioned immunosuppression affected IgA and IgM antibody-forming cells, particularly in Peyer

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Area of Science:

  • Immunology
  • Gastrointestinal Immunology
  • Vaccinology

Background:

  • Oral immunization strategies are crucial for developing effective vaccines.
  • Cyclophosphamide is an immunosuppressive drug used in various medical treatments.
  • Conditioned taste aversion can induce immunosuppression.

Purpose of the Study:

  • To investigate the effects of a conditioned immunosuppression regimen on antibody-forming cells (AFC) and cytokine production.
  • To determine the specific impact of cyclophosphamide and chocolate milk (CHM) on humoral immunity.

Main Methods:

  • Mice were pretreated with cyclophosphamide and CHM, followed by oral immunization.
  • Subsequent exposure to CHM assessed antibody responses.
  • Quantification of IgM and IgA AFC in spleen and Peyer's patches.

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  • In vitro analysis of cytokine production (IL-2, IL-4) from T cells.

    • Main Results:

    • Conditioned immunosuppression significantly reduced IgA-AFC in Peyer's patches (>fivefold).
    • Lesser reductions were observed in IgM-AFC in Peyer's patches (twofold) and both IgM- and IgA-AFC in spleen.
    • Decreased production of IL-2 and IL-4 cytokines from stimulated T cells.

    Conclusions:

    • Cyclophosphamide and CHM create a conditioned immunosuppression that impairs oral immune responses.
    • This effect is most pronounced for IgA-AFC in Peyer's patches.
    • Reduced IL-2 and IL-4 production may underlie the observed immunosuppression.