title: Mappain, a new cytotoxic prenylated stilbene from Macaranga mappa.
abstract: A new prenylated stilbene, mappain (1), was isolated from leaves of Macaranga mappa by bioassay-guided fractionation. The structure was established by application of spectroscopic methods. Mappain is cytotoxic but it appears to be a poor substrate for P-glycoprotein-mediated transport because it is equally potent and effective against the drug-sensitive SK-OV-3 and drug-resistant SKVLB-1 ovarian cancer cell lines, exhibiting an IC(50) value of 1.3 microM in both cases.
authors.affiliation: Department of Chemistry, University of Hawaii at Manoa, 2545 McCarthy Mall, Honolulu, Hawaii, 96822, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: van Der Kaaden
authors.forename: T K
authors.initials: TK
authors.lastname: Hemscheidt
authors.forename: S L
authors.initials: SL
authors.lastname: Mooberry
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D004354:Drug Screening Assays, Antitumor; D019665:Euphorbiaceae / Q000737:chemistry*; D006254:Hawaii; D006801:Humans; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D017368:Protein Prenylation; D013056:Spectrophotometry, Ultraviolet; D013267:Stilbenes / Q000737:chemistry* / Q000494:pharmacology*; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D013267:Stilbenes; C428186:mappain