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Visualization of Candida albicans in the Murine Gastrointestinal Tract Using Fluorescent In Situ Hybridization
Published on: November 5, 2019
Candida albicans escapes from mouse neutrophils
David Ermert1, Maria J Niemiec, Marc Röhm
1Laboratory for Molecular Infection Medicine Sweden, Umeå Centre for Microbial Research, Umeå University, Sjukhusområdet 6C, 90185 Umeå, Sweden.
Journal of Leukocyte Biology
|May 8, 2013
Summary
Murine neutrophils poorly kill Candida albicans, allowing fungal growth and cell death. Human neutrophils effectively combat C. albicans, highlighting key differences in antifungal immunity between mice and humans.
Area of Science:
- Mycology
- Immunology
- Infectious Diseases
Background:
- Candida albicans is a common human fungal pathogen with yeast and filamentous forms.
- Morphological switching is vital for C. albicans pathogenesis.
- Mice are frequently used to model human candidiasis, but differences in immune responses may exist.
Purpose of the Study:
- To compare the interactions of C. albicans with neutrophils from mice and humans.
- To identify differences in antifungal defense mechanisms between murine and human neutrophils.
Main Methods:
- Co-culture experiments involving C. albicans and isolated neutrophils from mice and humans.
- Microscopic analysis of fungal morphology and neutrophil integrity.
- Assessment of neutrophil killing capacity and potential mechanisms involved.
Main Results:
- Murine neutrophils demonstrated significantly lower C. albicans killing activity compared to human neutrophils.
- C. albicans formed germ tubes and ruptured murine neutrophils after internalization.
- C. albicans growth and escape were inhibited within human neutrophils, potentially due to higher MPO activity and α-defensins.
Conclusions:
- Significant differences exist in the interaction of C. albicans with murine versus human neutrophils.
- Murine models may not fully recapitulate human antifungal immune responses.
- Findings suggest higher myeloperoxidase (MPO) activity and α-defensins contribute to enhanced C. albicans control in human neutrophils.
