Candida adherence to mucosal epithelial cells with regard to its pathogenicity

Area of Science:

• Medical Mycology
• Infectious Diseases
• Microbiology

Background:

• Candida species are opportunistic fungal pathogens.
• Mucosal surfaces like the buccal and vaginal epithelia are common sites for Candida colonization.
• Understanding adherence mechanisms is key to preventing fungal infections.

Purpose of the Study:

• To compare the in vitro adherence of pathogenic and non-pathogenic Candida strains to human buccal and vaginal epithelial cells.
• To investigate the influence of different incubation media (saline, phosphate buffer, saliva) and incubation times (30, 90 min) on adherence.
• To correlate adherence properties with previously established pathogenicity in mice.

Main Methods:

• In vitro adherence assays using human buccal and vaginal epithelial cells.
• Testing with twelve Candida strains, categorized as pathogenic (8 strains) or non-pathogenic (4 strains).
• Incubation in 0.9% saline, phosphate buffer, and saliva (for buccal cells) for 30 and 90 minutes.

Main Results:

• Pathogenic Candida strains exhibited significantly higher adherence to vaginal epithelial cells in both saline and phosphate buffer compared to non-pathogenic strains (p < 0.01).
• Adherence of pathogenic strains to buccal cells was significantly greater in saline (p < 0.05 after 30 min, p < 0.01 after 90 min).
• No significant differences were observed in phosphate buffer for buccal cell adherence.

Conclusions:

• Fungal adherence to mucosal surfaces is a critical factor in Candida colonization.
• Pathogenic Candida strains demonstrate enhanced adherence capabilities, particularly to vaginal epithelium.
• These findings highlight adherence as a potential virulence factor contributing to the development of fungal infections.