Effect of the BD132 Dendron Against Candida tropicalis: Inhibition of Biofilm Formation and Enzymatic and Structural Alterations.

Background: Candida tropicalis is a pathogenic yeast species responsible for infections within the Candida genus and is identified as the most virulent species after C. albicans, partly due to its ability to form biofilms. Objective: This study analyzes the antifungal efficacy of a newly synthesized dendron, BD132 dendron, against C. tropicalis. Results: The compound showed a strong antifungal activity with promising minimum inhibitory concentration (MIC) and minimum biofilm inhibitory concentration (MBIC) values. Combination therapy with AgNO3 and amphotericin B showed additive and synergistic effects, respectively, enhancing antifungal efficacy and potentially reducing cytotoxicity. The dendron did not alter key enzyme activities, and scanning electron microscopy revealed significant morphological alterations, including increased cell size and surface damage, indicating membrane disruption. In addition, the BD132 dendron did not induce resistance, and stability studies indicated a slight MIC decrease at 4 °C and -20 °C after 15 days, with stable minimum fungicidal concentration (MFC), suggesting potential for long-term use. Conclusions: These findings highlight the potential of this dendron in combination therapies to treat C. tropicalis infections.