Journal
REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY
Volume 28, Issue 6, Pages 697-702Publisher
SOC BRASILEIRA FARMACOGNOSIA
DOI: 10.1016/j.bjp.2018.08.004
Keywords
Amazonian plant; Chalcone; Flavonoid; Lignan; Stilbene; Timbo
Categories
Funding
- Brazilian Research Agency CNPq [PPBio/CNPq - 457472/2012-0, CT-Agro/CNPq - 405804/2013-0, REPENSA/CNPq/FAPEAM - 562892/2010-9]
- Brazilian Research Agency CAPES [Pro-Amazonia/CAPES - 23038.000738/2013-78]
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Candida spp. is associated with almost 80% of all nosocomial fungal infections and is considered a major cause of blood stream infections. In humans, Cryptococcosis is a disease of the lungs caused by the fungi Cryptococcus gattii and Cryptococcus neoformans. It can be potentially fatal, especially in immune-compromised patients. In a search for antifungal drugs, Deguelia duckeana extracts were assayed against these two fungi and also against Candida albicans, which causes candidiasis. Hexane branches and CH2Cl2 root extracts as well as the substances 4-hydroxylonchocarpine, 3,5,4'-trimethoxy-4-prenylstilbene and 3',4'-methylenedioxy-7-methoxyflavone were assayed to determine the minimal inhibitory concentration. Phytochemical study of CH2Cl2 root and hexane branch extracts from D. duckeana A.M.G. Azevedo, Fabaceae, resulted in the isolation and characterization of nine phenolic compounds: 4-hydroxyderricine, 4-hydroxylonchocarpine, 3',4',7-trimethoxy-flavonol, 5,4'-dihydroxy-isolonchocarpine, 4-hydroxyderricidine, derricidine, 3,5,4'-trimethoxy-stilbene, 3',4',7-trimethoxyflavone and yangambin. The only active extract was a CH2Cl2 root showing minimal inhibitory concentration 800 mu g/ml against C. gattii, and the investigation of compounds obtained from this extract showed that 4-hydroxylonchocarpine was active against all three fungi (C. neoformans, C. gattii and C. albicans). These results suggest that D. duckeana extracts have potential therapeutic value for the treatment of pathogenic fungi. (C) 2018 Published by Elsevier Editora Ltda. on behalf of Sociedade Brasileira de Farmacognosia.
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