title: Screening for cytotoxic activity of extracts and isolated alkaloids from bulbs of Hippeastrum vittatum.
abstract: The dichloromethane and n-butanol extracts obtained from fresh bulbs of Hippeastrum vittatum (Amaryllidaceae), collected in Southern Brazil, were evaluated for their cytotoxic activity in vitro against five human cell lines (HT29 colon adenocarcinoma, H460 non-small cell lung carcinoma, RXF393 renal cell carcinoma, MCF7 breast cancer, and OVCAR3 epithelial ovarian cancer), using the sulphorhodamine B assay. Both extracts showed potential antiproliferative activity. From CH(2)Cl(2) fraction, three alkaloids were isolated: lycorine, vittatine and montanine. The two last compounds were submitted to the antiproliferative assay and the highest level of cytotoxicity was found for the alkaloid montanine.
authors.affiliation: Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Rio Grande do Sul, Av. Ipiranga 2752, 90610-010 Porto Alegre, RS, Brazil.
authors.forename: A F S
authors.initials: AF
authors.lastname: Silva
authors.forename: J P
authors.initials: JP
authors.lastname: de Andrade
authors.forename: K R B
authors.initials: KR
authors.lastname: Machado
authors.forename: A B
authors.initials: AB
authors.lastname: Rocha
authors.forename: M A
authors.initials: MA
authors.lastname: Apel
authors.forename: M E G
authors.initials: ME
authors.lastname: Sobral
authors.forename: A T
authors.initials: AT
authors.lastname: Henriques
authors.forename: J A S
authors.initials: JA
authors.lastname: Zuanazzi
mesh_terms: D000470:Alkaloids / Q000737:chemistry / Q000494:pharmacology*; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D019668:Liliaceae / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000470:Alkaloids; D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts