期刊
BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE
卷 14, 期 -, 页码 -出版社
BMC
DOI: 10.1186/1472-6882-14-245
关键词
Antifungal activity; Cytotoxicity; Hymenaea courbaril
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento Pessoal de Nivel Superior (CAPES)
- Fundacao Nacional de Pesquisa de Goias (FUNAPE)
Background: The great potential of plants as Hymenaea courbaril L (jatoba) has not yet been throughly explored scientifically and therefore it is very important to investigate their pharmacological and toxicological activities to establish their real efficacy and safety. This study investigated the cytotoxicity of xylem sap of Hymenaea courbaril L and its bioactivity against the fungi Cryptococcus neoformans species complex and dermatophytes. Methods: The fresh xylem sap of H. courbaril was filtered resulting in an insoluble brown color precipitate and was identified as fisetin. In the filtrate was identified the mixture of fisetinediol, fustin, 3-O-methyl-2,3-trans-fustin and taxifolin, which were evaluated by broth microdilution antifungal susceptibility testing against C. neoformans species complex and dermatophytes. The fresh xylem sap and fisetin were screened for cytotoxicity against the 3T3-A31 cells of Balb/c using neutral red uptake (NRU) assay. Results: The fresh xylem sap and the fisetin showed higher in vitro activity than the filtrate. The xylem sap of H. courbaril inhibited the growth of dermatophytes and of C. neoformans with minimal inhibition concentration (MIC) < 256 mu g/mL, while the fisetin showed MIC < 128 mu g/mL for these fungi. Fisetin showed lower toxicity (IC50 = 158 mu g/mL) than the fresh xylem sap (IC50 = 109 mu g/mL). Conclusion: Naturally occurring fisetin can provide excellent starting points for clinical application and can certainly represent a therapeutic potential against fungal infections, because it showed in vitro antifungal activity and low toxicity on animal cells.
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