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A Soluble Tetrazolium-Based Reduction Assay to Evaluate the Effect of Antibodies on Candida tropicalis Biofilms
Published on: September 16, 2022
Contributions of the Biofilm Matrix to Candida Pathogenesis
Jeniel E Nett1, David R Andes1
1Departments of Medicine and Medical Microbiology & Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA.
Abstract:
In healthcare settings, Candida spp. cause invasive disease with high mortality. The overwhelming majority of cases are associated with the use of critically-needed medical devices, such as vascular catheters. On the surface of these indwelling materials, Candida forms resilient, adherent biofilm communities. A hallmark characteristic of this process is the production of an extracellular matrix, which promotes fungal adhesion and provides protection from external threats. In this review, we highlight the medical relevance of device-associated Candida biofilms and draw attention to the process of Candida-biofilm-matrix production. We provide an update on the current understanding of how biofilm extracellular matrix contributes to pathogenicity, particularly through its roles in the promoting antifungal drug tolerance and immune evasion.
Insights
Candida biofilms on medical devices cause invasive infections. Their protective matrix aids fungal survival, promoting antifungal drug tolerance and immune evasion, leading to high mortality.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Biomaterials Science
Background:
- Invasive fungal infections, primarily caused by *Candida* species, are a significant cause of mortality in healthcare settings.
- These infections are frequently associated with indwelling medical devices, particularly vascular catheters.
- *Candida* forms resilient biofilms on these devices, characterized by an extracellular matrix that enhances adhesion and protection.
Purpose of the Study:
- To review the medical significance of device-associated *Candida* biofilms.
- To elucidate the process of *Candida*-biofilm-matrix production.
- To update the understanding of the extracellular matrix's role in fungal pathogenicity, antifungal drug tolerance, and immune evasion.
Main Methods:
- Literature review focusing on *Candida* biofilms and their extracellular matrix.
- Analysis of current research on biofilm formation and pathogenicity mechanisms.
- Synthesis of information regarding the matrix's contribution to antifungal resistance and immune evasion.
Main Results:
- Device-associated *Candida* biofilms represent a critical challenge in healthcare-associated infections.
- The extracellular matrix is pivotal in promoting fungal adhesion to medical devices.
- The matrix plays a key role in conferring antifungal drug tolerance and facilitating immune evasion by *Candida*.
Conclusions:
- Understanding *Candida* biofilm matrix production is crucial for developing effective therapeutic strategies.
- Targeting the biofilm matrix may offer a novel approach to combatting device-associated candidiasis.
- Further research into matrix composition and function is warranted to improve patient outcomes.
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