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Quantifying the Antifungal Activity of Peptides Against Candida albicans
Published on: January 13, 2023
Antifungal Properties of Hydrazine-Based Compounds against Candida albicans
Louis Camaioni1,2,3, Dylan Lambert1,2,3, Boualem Sendid1,2,3
1CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, INSERM U1285, F-59000 Lille, France.
Abstract:
Candida albicans, an opportunistic yeast, is the most common cause of fungal infection. In the past decade, there has been an increase in C. albicans resistance to existing antifungal drugs, which has necessitated the development of new antifungal agents. In the present study, screening 60 compounds from the JUNIA chemical library enabled us to explore an additional 11 hybrid compounds that contain pyrrolidinone rings and hydrazine moieties for their potential antifungal activities. This chemical series was identified with fair to excellent antifungal activities. Among this series, three molecules (Hyd.H, Hyd.OCH3, and Hyd.Cl) significantly reduced C. albicans viability, with rapid fungicidal activity. In addition, these three compounds exhibited significant antifungal activity against clinically isolated fluconazole- or caspofungin-resistant C. albicans strains. Hyd.H, Hyd.OCH3, and Hyd.Cl did not show any cytotoxicity against human cancer cell lines up to a concentration of 50 µg/mL and decreased Candida biofilm formation, with a significant reduction of 60% biofilm formation with Hyd.OCH3. In an infection model of Caenorhabditis elegans with C. albicans, hydrazine-based compounds significantly reduced nematode mortality. Overall, fungicidal activity was observed for Hyd.H, Hyd.OCH3, and Hyd.Cl against C. albicans, and these compounds protected C. elegans from C. albicans infection.
Insights
New hydrazine-based compounds show potent antifungal activity against Candida albicans, including drug-resistant strains. These compounds are non-toxic and effective in reducing fungal infections in model organisms.
Area of Science:
- Medicinal Chemistry
- Mycology
- Infectious Diseases
Background:
- Candida albicans is a common cause of fungal infections.
- Increasing antifungal resistance necessitates novel therapeutic agents.
- Pyrrolidinone and hydrazine moieties are explored for antifungal potential.
Purpose of the Study:
- To identify novel antifungal compounds against Candida albicans.
- To evaluate the efficacy of hybrid compounds containing pyrrolidinone and hydrazine.
- To assess the safety and efficacy of promising candidates against resistant strains and in vivo models.
Main Methods:
- Screening of 60 compounds from the JUNIA library.
- Synthesis and evaluation of 11 novel hybrid compounds.
- Antifungal activity assays, cytotoxicity tests, biofilm inhibition assays, and Caenorhabditis elegans infection models.
Main Results:
- Three compounds (Hyd.H, Hyd.OCH3, and Hyd.Cl) demonstrated rapid fungicidal activity against C. albicans.
- These compounds were effective against fluconazole- and caspofungin-resistant C. albicans strains.
- No cytotoxicity was observed in human cancer cell lines; significant reduction in Candida biofilm formation and C. elegans mortality was noted.
Conclusions:
- Hyd.H, Hyd.OCH3, and Hyd.Cl are promising novel antifungal agents.
- These compounds exhibit broad-spectrum activity, including against resistant C. albicans.
- The identified compounds offer potential for developing new treatments for fungal infections.
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