title: Erymildbraedin A and B, two novel cytotoxic dimethylpyrano-isoflavones from the stem bark of Erythrina mildbraedii: evaluation of their activity toward endocrine cancer cells.
abstract: Two new dimethylpyrano-isoflavones, named erymildbraedin A (4) and B (5), were isolated from the stem bark of the Cameroonian medicinal plant Erythrina mildbraedii, along with four known ones, the linear congeners, scandenone (1), erysenegalinsein M (2), 5,4'-dihydroxy-2'-methoxy-8-(3,3-dimethylallyl)-2'',2''-dimethylpyrano[5,6:6,7]isoflavone (3), and the angular isoflavone eryvarin B (6), and two other compounds, fraxidin and scoparone. Their structures were elucidated by the usual spectroscopic methods and isoflavone effects on the growth of human breast, prostate, and endometrial adenocarcinoma cells were determined. Isoflavones 1, 3, and 6 strongly inhibited the growth of all three cell lines, supporting the notion that a non-oxidized isoprenyl group at C-8 is requisite for cytotoxic activity.
authors.affiliation: UMR CNRS 6014 - C.O.B.R.A.-IRCOF, UFR Médecine-Pharmacie, Université de Rouen, Rouen, France.
authors.forename: Ruben F
authors.initials: RF
authors.lastname: Tchokouaha
authors.forename: Xanthippi
authors.initials: X
authors.lastname: Alexi
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Chosson
authors.forename: Thierry
authors.initials: T
authors.lastname: Besson
authors.forename: Alexios-Leandros
authors.initials: AL
authors.lastname: Skaltsounis
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Seguin
authors.forename: Michael N
authors.initials: MN
authors.lastname: Alexis
authors.forename: Jean
authors.initials: J
authors.lastname: Wandji
mesh_terms: D000230:Adenocarcinoma / Q000188:drug therapy / Q000473:pathology; D001943:Breast Neoplasms / Q000188:drug therapy / Q000473:pathology; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects*; D004353:Drug Evaluation, Preclinical; D016889:Endometrial Neoplasms / Q000188:drug therapy / Q000473:pathology; D004895:Erythrina / Q000737:chemistry*; D005260:Female; D006801:Humans; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D008297:Male; D008517:Phytotherapy; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D011471:Prostatic Neoplasms / Q000188:drug therapy / Q000473:pathology; D013329:Structure-Activity Relationship
chemical_list: D007529:Isoflavones; D010936:Plant Extracts