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Effect of Micafungin (FK463) on Candida albicans adherence to epithelial cells
Margarete Borg-von Zepelin1, Karen Zaschke, Uwe Gross
1Department of Bacteriology, Göttingen, Germany. mborg@gwdg.de
Background:
Adherence is considered a major virulence trait of Candida albicans. FK463 is a new investigational intravenous antifungal of the 'candin family' with potent in vitro and in vivo activity against Candida spp.
Objective:
The aim of the present study was to investigate the effect of Micafungin (FK463) on Candida adherence to epithelial cells of azole-sensitive and azole-resistant C. albicans isolates.
Methods:
An in vitro assay using microtest plate technology and fluorescence measurement was developed to compare the adherence of C. albicans SC5314 and of paired C. albicans isolates to epithelial cells in the presence and in the absence of FK463.
Results:
FK463 showed a marked inhibitory effect on the adherence of C. albicans SC5314. The addition of FK463 reduced the adherence of C. albicans SC5314 to 90% of the value of control without drug. A dose-dependent adherence inhibition was observed with FK463 in the range of 10-0.015 microg ml(-1). The comparison of paired C. albicans isolates, either a fluconazole-susceptible and a fluconazole-resistant isolate of one patient, revealed no significant difference in the adherence behavior between azole-susceptible and azole-resistant.
Conclusion:
Micafungin (FK463) has the capacity to reduce adherence of C. albicans azole-susceptible and azole-resistant strains to epithelial cells.
Insights
Micafungin (FK463) significantly reduces Candida albicans adherence to epithelial cells. This new antifungal is effective against both azole-sensitive and azole-resistant strains, offering a potential new strategy for treating Candida infections.
Area of Science:
- Mycology
- Infectious Diseases
- Pharmacology
Background:
- Candida albicans adherence is a key virulence factor.
- Micafungin (FK463) is an investigational intravenous antifungal with demonstrated activity against Candida species.
Purpose of the Study:
- To evaluate the impact of Micafungin (FK463) on the adherence of azole-susceptible and azole-resistant Candida albicans isolates to epithelial cells.
Main Methods:
- An in vitro assay utilizing microtest plate technology and fluorescence measurements was employed.
- The adherence of C. albicans SC5314 and paired clinical isolates was assessed in the presence and absence of FK463.
Main Results:
- FK463 demonstrated a significant inhibitory effect on C. albicans SC5314 adherence, reducing it by up to 90% compared to controls.
- A dose-dependent inhibition of adherence was observed within the FK463 concentration range of 10-0.015 µg/mL.
- No significant difference in adherence was found between azole-susceptible and azole-resistant paired C. albicans isolates.
Conclusions:
- Micafungin (FK463) effectively reduces the adherence of both azole-susceptible and azole-resistant Candida albicans strains to epithelial cells.
- This suggests FK463 may be a valuable therapeutic agent for managing Candida infections, irrespective of azole resistance.