Antioxidant capacity, antimicrobial activity and triterpenes isolated from Jatropha isabellei Mull Arg.

作者：Froehlich Janaina Kieling; Forbrig Froeder Amanda Luana; Janovik Vanessa; Venturini Tarcieli Pozzebon; Pereira Romaiana Picada; Boligon Aline Augusti; de Brum Thiele Faccim; Alves Sydney Hartz; Teixeira da Rocha Joao Batista; Athayde Margareth Linde

来源：Natural Product Research, 2013, 27(12): 1049-1059.

DOI：10.1080/14786419.2012.706296

• Jatropha isabellei
• antioxidant capacity
• antimicrobial activity
• triterpenes

Jatropha isabellei Mull Arg. belongs to the family Euphorbiaceae. The antioxidant capacity of this plant was evaluated by the DPPH method and inhibition of thiobarbituric acid reactive substances (TBARS). Ethyl acetate fraction demonstrated the best antioxidant capacity against the DPPH free radical and its profile was similar to ascorbic acid. This fraction also presented the best results of phenolics, flavonoids and condensed tannins, showing a positive relation between the phenolic content and antioxidant activity. All fractions and the crude extract were able to inhibit significantly the TBARS production induced by Fe(II) for the two tested concentrations, reaching the basal levels. In this test, ethyl acetate and dichloromethane fraction showed good values for inhibitory concentration. The dichloromethane fraction showed the best results against the fungi Sporothrix schenckii and Fusarium proliferatum and the bacterium of Micrococcus genus. This fraction allowed the isolation of acetil aleuritolic acid and a mixture of sitosterol 3-O--D-glucoside and stigmasterol, described for the first time in this species.

• 出版日期2013-6-1