ABSTRACT
Endophytic fungi are fungi that colonize internal tissues of plants. There are few studies of compounds isolated from endophytic fungi of Amazon plants. Thus, the aim this study was the isolation and structural identification of sitosterol (1), stigmasterol (2), sitostenone (3), squalene (4), ergosterol (5) and ergosterol peroxide (6) from fungus Colletotrichum gloeosporioidesisolated as endophytic from Virola michelli, a typical Amazon plant, used in folk medicine against skin infection. Compounds were isolated by chromatography column on silica and identified by 1H and 13C NMR and MS. The presence of phytosterols in fungi is rare and this is the first report of the isolation of the phytosterols sitosterol, stigmasterol and sitostenone from the genus Colletotrichum.
Fungos endofíticos são fungos que colonizam os tecidos internos das plantas. Existem poucos estudos de compostos isolados de fungos endofíticos de plantas da Amazônia. Assim, o objetivo deste estudo foi o isolamento e identificação estrutural de sitosterol (1), estigmasterol (2), sitostenona (3), esqualeno (4), ergosterol (5) e peroxido de ergosterol (6) do fungo Colletotrichum gloeosporioidesisolado como endofítico de Virola michelli, uma planta típica da Amazônia, usada na medicina popular no combate a infecções de pele. Os compostos foram isolados por cromatografia em coluna de sílica e identificados por RMN 1H e 13C e EM. A presença de fitoesteróis em fungos é rara e este é o primeiro relato do isolamento dos fitoesteróides sitosterol, estigmasterol e sitostenona do gêreno Colletotrichum.
Subject(s)
Animals , Colletotrichum/chemistry , Endophytes , Phytosterols/isolation & purification , Myristicaceae , Steroids , FungiABSTRACT
Sterol fractions were isolated from the hemolymph and hepatopancreasovotestis complex of snails, target [Biomphalaria alexandrina] and non- target [Lymnaea truncatula and Physa acuta] to schistosoma infection. The sterol fractions were identified using GC/MS and also they were investigated in different maturity stages of Biomphalaria alexandrina snails. The results revealed the presence of C[26], C[27], C[28], C[29], and C[30] sterols in tissue extracts and hemolymph or hemocyanin of the three snail species. The probable biosynthetic pathways and metabolism of some of these sterols into various forms present in higher vertebrates were discussed. It is suggested that Biomphalaria alexandrina snails are capable of converting delta[5] sterols into- delta[7] and delta[5,7,22] sterols. Also, the different maturity stages of B. alexandrina snails revealed the possible role of the digestive gland in the interconversion of sterols and the increase in sterol content with sexual maturity. Sterol fractions were investigated by GC/MS from hemolymph and hepatopancreas-ovotestis complex of Schistosoma target [B. alexandrina] and Schistosoma non-target [Lymnaea truncatula and Physa acuta] snails. Also the levels of these sterols were determined in different maturity stages [juvenile, adult, sensent] of B. alexandrina snails
Subject(s)
Biomphalaria , Lymnaea , Physarum , Phytosterols/isolation & purification , Gas Chromatography-Mass Spectrometry , HemolymphABSTRACT
Los procedimientos descritos en la literatura para el aislamiento de los fitosteroles contenidos en la fracciòn de aceite de la cera de caña de azúcar presentan diferentes desventajas técnicas que dificultan su aplicaciòn industrial. El proceso que se describe, empleando la precipitación de las sales de sodio obtenidas de la saponificaciòn de los ésteres presentes por cambio de solvente, permite aislar una mezcla de fitosteroles capaz de ser transformada en androstendiona (AD) y androstandiendiona (ADD). Al mismo tiempo, es posible regenerar la mezcla de ácidos grasos de sus sales y utilizarlas, en particular, en la alimentaciòn avícola