title: Studies on the cytotoxicity of miscellaneous compounds from Eupatorium betonicaeforme (D.C.) Baker (Asteraceae).
abstract: A detailed study on the cytotoxic effects of five known constituents isolated from the flowers and roots of Eupatorium betonicaeforme is reported, including 2,2-dimethyl-6-vinylchroman-4-one (1), 2-senecioyl-4-vinylphenol (2), 6-acetyl-2,2-dimethylchroman-4-one (3), (4E)-8beta-angeloyloxy-9beta,10beta-dihydroxy-1-oxogermacra-4,11(13)-dien-12,6alpha-olide (4), and 3beta-hydroxyicosan-1,5beta-olide (5). The sesquiterpene lactone 4 exhibited the highest cytotoxicity, with IC50 values ranging from 3.9 to 9.9 microM, showing some degree of cell selectivity. The antiproliferative activity of 4 was examined towards HL-60 cells, and found to diminish cell viability in a dose-dependent manner. Moreover, at all concentrations tested, there was a decrease in the number of cells capable of incorporating 5-bromo-2'-deoxyuridine (BrdU), indicating disruption of DNA synthesis. The morphological changes induced by 4 were compatible with apoptotic cell death. This work, thus, corroborates the anticancer potential of Eupatorium secondary metabolites.
authors: Departamento de Fisiologia e Farmacologia, Universidade Federal do Ceará, Caixa Postal 3157, 60430-270 Fortaleza, Ceará, Brazil.
authors: Danilo D
authors: DD
authors: Rocha
authors: Ivana N F
authors: IN
authors: Dantas
authors: Maria Rose Jane R
authors: MR
authors: Albuquerque
authors: Raquel C
authors: RC
authors: Montenegro
authors: Cláudia
authors: C
authors: Pessoa
authors: Manoel Odorico
authors: MO
authors: de Moraes
authors: Otília Deusdênia L
authors: OD
authors: Pessoa
authors: Edilberto R
authors: ER
authors: Silveira
authors: Letícia V
authors: LV
authors: Costa-Lotufo
mesh_terms: D019659:Asteraceae / Q000737:chemistry*; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D006801:Humans; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry / Q000633:toxicity
chemical_list: D010936:Plant Extracts