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Antiproliferative Activity of Flavonoids from Croton sphaerogynus Baill. (Euphorbiaceae)

2015; Hindawi Publishing Corporation; Volume: 2015; Linguagem: Inglês

10.1155/2015/212809

2314-6141

Kátia Pereira dos Santos, Lucimar B. Motta, Déborah Yara Alves Cursino dos Santos, Maria Luiza Faria Salatino, Antônio Salatino, Marcelo J. P. Ferreira, João Henrique G. Lago, Ana Lúcia Tasca Góis Ruiz, João Ernesto de Carvalho, Cláudia Maria Furlan,

Essential Oils and Antimicrobial Activity

Croton sphaerogynus is a shrub from the Atlantic Rain Forest in southeastern Brazil. A lyophilized crude EtOH extract from leaves of C. sphaerogynus , obtained by maceration at room temperature (seven days), was suspended in methanol and partitioned with hexane. The purified MeOH phase was fractionated over Sephadex LH-20 yielding five fractions ( F1–F5 ) containing flavonoids, as characterized by HPLC-DAD and HPLC-MS analyses. The antiproliferative activity of the crude EtOH extract, MeOH and hexane phases, and fractions F1–F5 was evaluated on in vitro cell lines NCI-H460 (nonsmall cell lung), MCF-7 (breast cancer), and U251 (glioma). The MeOH phase showed activity (mean log GI 50 0.54) higher than the hexane phase and EtOH extract (mean log GI 50 1.13 and 1.19, resp.). F1 exhibited activity against NCI-H460 (nonsmall cell lung) (GI 50 1.2 μ g/mL), which could be accounted for the presence of flavonoids and/or diterpenes. F4 showed moderate activity (mean log GI 50 1.05), while F5 showed weak activity (mean log GI 50 1.36). It is suggested that the antiproliferative activity of the crude EtOH extract and MeOH phase is accounted for a synergistic combination of flavonoids and diterpenes.