Introduction
Candida albicans (C. albicans) infections pose a significant health challenge, necessitating the exploration of novel antifungal agents. Essential oils derived from medicinal plants play a crucial role in aromatherapy as a complementary therapeutic approach. This study aimed to investigate the molecular mechanisms of Melaleuca bracteata F. Mueall (M. bracteata) essential oil against C. albicans, establishing its potential as a novel plant-derived antifungal therapeutic in response to increasing antimicrobial resistance.
Methods
This study employed a comprehensive approach, combining chemical analysis, in vitro experiments, and computational methods to investigate the antifungal properties of M. bracteata essential oil against C. albicans.
Results
Gas Chromatography-Mass Spectrometry (GCMS) analysis revealed eugenol methyl ether (EME) as the predominant component (86.87 %) of M. bracteata essential oil. The oil demonstrated potent antifungal activity against C. albicans, with a Minimum Inhibitory Concentration (MIC) of 400 µg/mL. It significantly inhibited biofilm formation, with 96.03 % inhibition at MIC, and caused notable morphological changes in C. albicans cells as observed through Scanning Electron Microscope (SEM). Gene expression analysis showed the downregulation of key biofilm-related genes (efg1, als3, act1) upon treatment with the oil. Molecular docking suggested potential interactions of EME with critical C. albicans proteins. Importantly, the oil exhibited limited cytotoxicity against various mammalian cell lines. Absorption, Distribution, Metabolism, Excretion, and Toxicity (ADMET) predictions indicated favorable pharmacokinetic properties for EME, while network pharmacology analysis suggested potential immunomodulatory effects.
Conclusions
These findings highlight the promising antifungal potential of M. bracteata essential oil, particularly EME, against C. albicans, warranting further investigation for its development as a novel therapeutic agent.
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