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Candidiasis in interferon-gamma knockout (IFN-gamma-/-) mice
E Balish1, R D Wagner, A Vázquez-Torres
1University of Wisconsin Medical School, Department of Medical Microbiology, Madison 53706-1532, USA. balish@surgery.wisc.edu
The Journal of Infectious Diseases
|August 11, 1998
Summary
Interferon-gamma (IFN-gamma) is crucial for fighting Candida albicans infections in mice. Lack of IFN-gamma increases susceptibility to gastric, anorectal, and systemic candidiasis, and may lead to intestinal adenomas.
Area of Science:
- Immunology
- Microbiology
- Gastroenterology
Background:
- Interferon-gamma (IFN-gamma) plays a vital role in immune responses against fungal pathogens.
- Candida albicans is an opportunistic fungus that can cause mucosal and systemic infections.
Purpose of the Study:
- To investigate the role of IFN-gamma in susceptibility to Candida albicans infection.
- To assess the impact of IFN-gamma deficiency on mucosal and systemic candidiasis.
Main Methods:
- Germ-free mice with and without IFN-gamma (IFN-gamma(-/-)) were colonized with Candida albicans.
- Mice were monitored for 15 weeks to assess survival and susceptibility to candidiasis.
- Immune responses, including spleen cell proliferation and antibody production, were analyzed.
Main Results:
- IFN-gamma knockout mice showed increased susceptibility to gastric, anorectal, and systemic candidiasis compared to controls.
- Colonization with C. albicans was not lethal in IFN-gamma knockout mice.
- Some IFN-gamma knockout mice developed intestinal adenomas after C. albicans colonization.
- Enhanced susceptibility was associated with poor spleen cell proliferation and a T helper 2 (IgG1) antibody response.
Conclusions:
- IFN-gamma is essential for resistance to gastric, anorectal, and acute systemic candidiasis in mice.
- IFN-gamma deficiency leads to increased susceptibility to C. albicans infections.
- The findings highlight the importance of IFN-gamma in controlling fungal infections and preventing associated pathologies.