Abstract
The emergence of drug resistance and limitation of antifungal agents complicate the management of fungal infection. Candida albicans, as the most common fungal infection pathogen, causes candidiasis via developing its virulence factors. In this study, we found trans-cinnamaldehyde (TC), known as a “Generally Regarded As Safe” (GRAS) molecule, had moderate antifungal activities against various Candida species and could retard the virulence of C. albicans in a dose-dependent manner by inhibiting the adhesion, morphological transition and biofilms formation. The mechanisms investigation revealed that the inhibition of hyphae and biofilms development was caused by the increasing farnesol secretion induced by Dpp3 expression. Since drug resistance restricted the treatment of clinical fungal infection, we explored the capacity of TC to develop drug-resistance under a long time TC treatment. Results showed that TC had little chance to form resistance by a serial passage experiment. Our work illustrates the underlying mechanism of TC inhibition of morphological transition and provides a optional application in treating the relevant fungal infections by targeting fungal virulence factors.
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