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Candida-specific Th1-type responsiveness in mice with experimental vaginal candidiasis
P L Fidel1, M E Lynch, J D Sobel
1Department of Medicine, Wayne State University School of Medicine, Detroit, Michigan 48201.
Infection and Immunity
|October 1, 1993
Summary
Systemic cell-mediated immunity (CMI) in vaginal candidiasis was studied in mice. Peripheral CMI responses, specifically Th1-type immunity, were observed regardless of infection persistence or estrogen status, indicating a robust host defense.
Area of Science:
- Immunology
- Microbiology
- Host-pathogen interactions
Background:
- The role of systemic cell-mediated immunity (CMI) in vaginal host defense is not well understood.
- Previous studies established a murine model of vaginal candidiasis with persistent infection and delayed-type hypersensitivity (DTH) responses.
Purpose of the Study:
- To characterize peripheral CMI reactivity in response to vaginal candidiasis.
- To determine if pseudoestrus is necessary for inducing peripheral CMI.
Main Methods:
- Mice, with or without estrogen treatment, were inoculated vaginally with Candida albicans.
- Vaginal Candida burden, DTH responsiveness, and in vitro lymphokine production (IL-2, IFN-gamma, IL-4, IL-10) were assessed over 4 weeks.
Main Results:
- Estrogen treatment led to persistent vaginal candidiasis, while non-estrogen-treated mice had short-lived infections.
- Both groups exhibited equivalent DTH reactivity and predominantly Th1-type lymphokine production (IL-2, IFN-gamma) in response to Candida antigens.
- No significant IL-10 production or substantial IL-4 elevation was observed.
Conclusions:
- Experimental vaginal candidiasis induces a predominantly Th1-type Candida-specific peripheral CMI response.
- This Th1-type reactivity occurs irrespective of infection persistence or the estrogen status of the host.