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Thiazole compounds with activity against Cryptococcus gattii and Cryptococcus neoformans in vitro
Nívea Pereira de Sá1, Cleudiomar Inácio Lino2, Nayara Cristina Fonseca2
1Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
European Journal of Medicinal Chemistry
|August 16, 2015
Summary
Novel thiazole compounds show potent antifungal activity against Cryptococcus species, with low toxicity to mammalian cells. These findings suggest potential for developing new treatments for cryptococcosis.
Area of Science:
- Mycology
- Medicinal Chemistry
- Pharmacology
Background:
- Human cryptococcosis is a systemic infection caused by *Cryptococcus* species, often opportunistic.
- Existing antifungal treatments have limitations, necessitating the search for novel therapeutic agents.
Purpose of the Study:
- To evaluate the in vitro antifungal activity and cytotoxicity of thirteen synthesized compounds against *Cryptococcus gattii* and *Cryptococcus neoformans*.
- To identify promising compounds for further development as potential antifungal drugs.
Main Methods:
- In vitro assessment of antifungal activity against *C. gattii* and *C. neoformans*.
- Cytotoxicity evaluation in VERO cells and murine macrophages.
- Combination studies with amphotericin B and fluconazole.
Main Results:
- Four heterocyclic thiazole compounds (1b, 1c, 1d, 1m) demonstrated significant antifungal activity and low cytotoxicity.
- Antifungal efficacy was comparable to or better than fluconazole and approached that of amphotericin B.
- Compound 1c showed antagonism with amphotericin B against *C. gattii*, but overall ergosterol content remained unaffected.
Conclusions:
- Novel, easily synthesized thiazole compounds exhibit promising antifungal properties against *Cryptococcus* species.
- These compounds display low toxicity in mammalian cells, indicating potential as prototypes for new antifungal drug development.
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