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Effect of gamma interferon on resolution of murine chlamydial genital infection

R G Rank1, K H Ramsey, E A Pack

  • 1Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock 72205.

Infection and Immunity
|October 1, 1992
PubMed

Insights

Interferon-gamma (IFN-gamma) plays a crucial role in resolving Chlamydia trachomatis infections in mice. Blocking IFN-gamma prolonged the infection, while its administration aided in clearing the pathogen.

Area of Science:

  • Immunology
  • Microbiology
  • Infectious Diseases

Background:

  • Chlamydia trachomatis causes genital tract infections.
  • Interferon-gamma (IFN-gamma) is a key cytokine in cell-mediated immunity.
  • The role of IFN-gamma in Chlamydia trachomatis resolution requires further elucidation.

Purpose of the Study:

  • To investigate the role of IFN-gamma in the resolution of Chlamydia trachomatis genital tract infection in a mouse model.
  • To determine if IFN-gamma is essential for clearing the infection.

Main Methods:

  • Mice were infected with Chlamydia trachomatis in the genital tract.
  • Treatment involved monoclonal rat anti-IFN-gamma antibody to neutralize IFN-gamma.
  • Recombinant IFN-gamma was passively administered to chronically infected nu/nu mice.

Main Results:

  • Anti-IFN-gamma antibody treatment significantly prolonged Chlamydia trachomatis infections in two separate experiments.
  • Passive administration of recombinant IFN-gamma led to the resolution of infection in some chronically infected nu/nu mice.
  • These findings indicate IFN-gamma's critical involvement in pathogen clearance.

Conclusions:

  • IFN-gamma is essential for the resolution of Chlamydia trachomatis genital tract infections in mice.
  • Neutralizing IFN-gamma exacerbates Chlamydia trachomatis infections.
  • IFN-gamma therapy may hold potential for treating persistent Chlamydia infections.

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