title: Flavonoids from the heartwood of the Thai medicinal plant Dalbergia parviflora and their effects on estrogenic-responsive human breast cancer cells.
abstract: From the heartwood of Dalbergia parviflora, eight new compounds, khrinones A (1), B (2), C (3), D (4), and E (5), isodarparvinol B (6), dalparvin (7), and (3S)-sativanone (22), along with 32 known compounds, have been isolated and characterized as 17 isoflavones, nine isoflavanones, five flavanones, six isoflavans, and three miscellaneous substances. Isolates were evaluated for their cell proliferation stimulatory activity against the MCF-7 and T47D human breast cancer cell lines, and their luciferase inductive effects using luciferase transiently transfected MCF-7/luc and T47D/luc cells were also determined. Isoflavones such as genistein (10), biochanin A (11), tectorigenin (12), and 2'-methoxyformononetin (13) stimulated the proliferation of both cells, and concentrations of lower than 1 muM of these compounds showed equivalent activity to 10 pM of estradiol (E2). The new isoflavanone (22) also showed activity against both cell types, although it was weaker than that of the corresponding isoflavone (2'-methoxyformononetin, 13). Two optically active isoflavanones (22 and 24: (3S)-violanone) stimulated the proliferation of both cell lines at lower concentrations than three racemates (21: vestitone, 23: 7,3'-dihydroxy-4'-methoxyisoflavanone, and 25: 3-O-methylviolanone). Bowdichione (20), an isoflavone with a quinone structure in its B-ring, showed activity against only one cell line associated with MCF-7 in these assays.
authors.affiliation: School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Shizuoka 422-8526, Japan. umehara@mail.u-shizuoka-ken.ac.jp
authors.forename: Kaoru
authors.initials: K
authors.lastname: Umehara
authors.forename: Kiyomitsu
authors.initials: K
authors.lastname: Nemoto
authors.forename: Ayako
authors.initials: A
authors.lastname: Matsushita
authors.forename: Eri
authors.initials: E
authors.lastname: Terada
authors.forename: Orawan
authors.initials: O
authors.lastname: Monthakantirat
authors.forename: Wanchai
authors.initials: W
authors.lastname: De-Eknamkul
authors.forename: Toshio
authors.initials: T
authors.lastname: Miyase
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Warashina
authors.forename: Masakuni
authors.initials: M
authors.lastname: Degawa
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Noguchi
mesh_terms: D035782:Dalbergia / Q000737:chemistry*; D004354:Drug Screening Assays, Antitumor; D004967:Estrogens / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D005260:Female; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D006801:Humans; D008156:Luciferases / Q000187:drug effects; D015394:Molecular Structure; D010946:Plants, Medicinal / Q000737:chemistry*; D013237:Stereoisomerism; D013785:Thailand; D014934:Wood / Q000737:chemistry
chemical_list: D004967:Estrogens; D005419:Flavonoids; D008156:Luciferases