RESUMO
Eighteen plant extracts from nine traditional Mexican medicinal plants were tested for antifungal activity against two dermatophyte fungal species (Trichophyton mentagrophytes and Trichophyton rubrum), one non-dermatophyte (Aspergillus niger), and one yeast (Candida albicans). The strongest effect was manifested by the hexane extracts from Eupatorium aschenbornianum and Sedum oxypetalum, as well as the methanol extracts from Lysiloma acapulcensis and Annona cherimolia.
Assuntos
Antifúngicos/farmacologia , Plantas Medicinais/química , Antifúngicos/isolamento & purificação , Fungos/efeitos dos fármacos , Hexanos , Metanol , México , Testes de Sensibilidade Microbiana , Extratos Vegetais/farmacologia , Leveduras/efeitos dos fármacosRESUMO
The triterpenes ursolic acid (1), 27-p-Z-coumaroyloxyursolic acid (2), 27-p-E-coumaroyloxyursolic acid, alpha-amyrine-3-palmitate and lupeol-3-palmitate were isolated through a bioactivity-guided fractionation from the acetonic extract of the aerial parts of Viburnum jucundum Morton in addition to amentoflavone, an epimeric mixture at C-2 of 2,3-dihydroamentoflavone, beta-sitosterol and beta-sitosteryl glucopyranoside. Ursolic acid (1) was the only constituent that exhibited cytotoxic activity toward three human cancer cell lines in culture. This is the first phytochemical and cytotoxic analysis performed to this plant species.
Assuntos
Antineoplásicos Fitogênicos/farmacologia , Gastroenteropatias/tratamento farmacológico , Extratos Vegetais/farmacologia , Triterpenos/farmacologia , Viburnum/química , Antineoplásicos Fitogênicos/química , Antineoplásicos Fitogênicos/isolamento & purificação , Linhagem Celular , Ensaios de Seleção de Medicamentos Antitumorais , Flavonoides/química , Flavonoides/isolamento & purificação , Flavonoides/farmacologia , Humanos , México , Extratos Vegetais/química , Plantas Medicinais , Esteróis/química , Esteróis/isolamento & purificação , Esteróis/farmacologia , Triterpenos/química , Triterpenos/isolamento & purificação , Células Tumorais Cultivadas , Ácido UrsólicoRESUMO
The cytotoxic compound moronic acid (1) and the new tetracyclic triterpene 3,4-seco-olean-18-ene-3,28-dioic acid (2), were isolated from the aerial parts of the medicinal plant Phoradendron reichenbachianum (mistletoe, Loranthaceae) through a bioassay-guided fractionation. In addition, squalene, glycerol trilinoleate, morolic acid, betulonaldehyde, betulinaldehyde, alpha-germanicol, lupeol, beta-sitosterol and beta-sitosteril glucopyranoside, were identified in this plant species. The structures were elucidated on the basis of chemical and spectroscopic evidence.
Assuntos
Antineoplásicos Fitogênicos/farmacologia , Magnoliopsida/química , Ácido Oleanólico/análogos & derivados , Ácido Oleanólico/farmacologia , Triterpenos/farmacologia , Linhagem Celular , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Ácido Oleanólico/química , Caules de Planta , Plantas Medicinais , Triterpenos/química , Triterpenos/isolamento & purificaçãoRESUMO
Two new cytotoxic isoflavans, (3S)-7-hydroxy-2',3',4',5', 8-pentamethoxyisoflavan (1) and (3S)-3',7-dihydroxy-2',4',5', 8-tetramethoxyisoflavan (2), were isolated from the bark and trunks of Eysenhardtia polystachya (Leguminosae), together with the known constituents stigmasterol, isoduartin, cuneatin, 7-hydroxy-2',4', 5'-trimethoxyisoflavone, and 3,4-dimethoxy-8, 9-(methylenedioxy)pterocarpan. The structures of 1 and 2 were elucidated on the basis of spectroscopic methods. The antimicrobial, cytotoxic, and insecticidal potential of some of these compounds were evaluated. The isoflavans 1, 2, and isoduartin (2', 7-dihydroxy-3',4',8-trimethoxyisoflavan) displayed moderate cytotoxic activity against KB cell lines.