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Related Experiment Videos

Gamma interferon modifies CD4+ subset expression in murine candidiasis.

L Romani1, E Cenci, A Mencacci

  • 1Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Italy.

Infection and Immunity
|November 1, 1992
PubMed
Summary
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Monoclonal antibodies targeting gamma interferon with a Candida albicans vaccine shifted immune responses from protective Th1 to nonprotective Th2. This altered the early expression of key immune signaling molecules in CD4+ cells.

Area of Science:

  • Immunology
  • Microbiology
  • Vaccinology

Background:

  • The balance between T-helper 1 (Th1) and T-helper 2 (Th2) immune responses is critical for effective vaccination.
  • Gamma interferon is a key cytokine associated with Th1 responses, crucial for cell-mediated immunity against fungal infections.
  • Candida albicans is a common fungal pathogen, and effective vaccines are needed to prevent candidiasis.

Purpose of the Study:

  • To investigate the impact of monoclonal antibodies against gamma interferon on immune responses induced by a live Candida albicans vaccine.
  • To determine whether the antibody treatment influences the development of Th1 versus Th2 responses.
  • To examine the effects on early gene expression of key cytokines in CD4+ T cells.

Main Methods:

  • Administration of a live Candida albicans yeast cell vaccine.

Related Experiment Videos

  • Co-administration of a single injection of monoclonal antibody to gamma interferon.
  • Analysis of immune cell responses, specifically Th1 and Th2 profiles.
  • Measurement of interleukin 4 and gamma interferon mRNA expression in CD4+ cells.

    • Main Results:

    • The combined treatment resulted in the detection of nonprotective Th2 immune responses instead of protective Th1 responses.
    • Early expression of interleukin 4 mRNA was detected.
    • Early expression of gamma interferon mRNA was altered in CD4+ cells.

    Conclusions:

    • Monoclonal antibody targeting gamma interferon can redirect vaccine-induced immune responses from a protective Th1 profile to a nonprotective Th2 profile.
    • This intervention affects the early transcriptional dynamics of immune signaling molecules in CD4+ T cells during vaccination.
    • Findings suggest a potential strategy to modulate immune responses, but highlight the risk of inducing non-protective immunity.