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An Optimized Protocol for Candida albicans Infection in Schmidtea mediterranea to Study Fungal Pathogenesis and Host Defense
Published on: April 17, 2026
Candida albicans proteinases and host/pathogen interactions
Julian Naglik1, Antje Albrecht, Oliver Bader
1Department of Oral Medicine, Pathology & Immunology, GKT Dental Institute, Kings College London (Guy's Campus), London, UK.
Abstract:
Candida infections are common, debilitating and often recurring fungal diseases and a problem of significant clinical importance. Candida albicans, the most virulent of the Candida spp., can cause severe mucosal and life-threatening systemic infections in immunocompromised hosts. Attributes that contribute to C. albicans virulence include adhesion, hyphal formation, phenotypic switching and extracellular hydrolytic enzyme production. The extracellular hydrolytic enzymes, especially the secreted aspartyl proteinases (Saps), are one of few gene products that have been shown to directly contribute to C. albicans pathogenicity. Because C. albicans is able to colonize and infect almost every tissue in the human host, it may be crucial for the fungus to possess a number of similar but independently regulated and functionally distinct secreted proteinases to provide sufficient flexibility in order to survive and promote infection at different niche sites. The aim of this review is to explore the functional roles of the C. albicans proteinases and how they may contribute to the host/pathogen interaction in vivo.
Insights
Secreted aspartyl proteinases (Saps) are key virulence factors in Candida albicans infections. This review explores how these enzymes contribute to fungal pathogenicity and host interaction in vivo.
Area of Science:
- Mycology
- Medical Microbiology
- Biochemistry
Background:
- Candida albicans is a significant cause of opportunistic fungal infections, particularly in immunocompromised individuals.
- Virulence factors of C. albicans include adhesion, hyphal formation, phenotypic switching, and extracellular enzyme production.
- Secreted aspartyl proteinases (Saps) are critical extracellular enzymes implicated in C. albicans pathogenicity.
Purpose of the Study:
- To review the functional roles of C. albicans proteinases.
- To elucidate the contribution of these enzymes to host-pathogen interactions in vivo.
Main Methods:
- Literature review of studies on C. albicans virulence factors.
- Analysis of research on secreted aspartyl proteinases (Saps).
- Exploration of host-pathogen interaction mechanisms.
Main Results:
- Secreted aspartyl proteinases (Saps) are directly involved in C. albicans pathogenicity.
- Multiple, independently regulated proteinases likely enable fungal survival and infection in diverse host niches.
- These enzymes are crucial for C. albicans to colonize and infect various human tissues.
Conclusions:
- Candida albicans proteinases, particularly Saps, play a vital role in fungal virulence.
- Understanding these enzymes is crucial for developing strategies against C. albicans infections.
- Further research into the specific functions of C. albicans proteinases in vivo is warranted.
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