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Journal of Antimicrobial Chemotherapy (1999) 43, 583-587
© 1999 The British Society for Antimicrobial Chemotherapy

Brief report

Effect of antifungal agents on the binding of Candida albicans to immobilized amino acids and bovine serum albumin

Khalid Islam* and Stephen P. Hawser

Lepetit Research Center, Via R. Lepetit 34, 21040 Gerenzano (VA), Italy

In this study the effects of different antifungal agents on the binding of Candida albicans yeast cells to different supports were examined. Pre-treatment with amphotericin B or dithiothreitol (DTT) severely reduced the ability of C. albicans yeasts to bind to plastic, while the effects of pre-treatment with fluconazole, ketoconazole or flucytosine were less marked. Both DTT and amphotericin B reduced the binding of yeasts to bovine serum albumin (BSA) and amino acids at low concentrations, while the other antifungal agents were effective at concentrations several-fold higher than their MICs. These data suggest that DTT and amphotericin B affect the yeast cell wall components, and alter both hydrophobic interactions with plastic, and the more specific interactions with BSA and amino acids. By contrast, the effect of the azoles and flucytosine appears to be largely restricted to hydrophobic interactions.

* Correspondence address. Hoechst Marion Roussel, Batiment Fleming Sr-5239, 102 Route de Noisy, F-93235 Romainville, Cedex, France. Tel: +33-1-4991-3259; Fax: +33-1-4991-3116; E-mail: Khalid. Islam{at}hmrag.com


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