title: Cytotoxic constituents of Soymida febrifuga from Myanmar.
abstract: The 70% ethanol extract of Soymida febrifuga was found to kill PANC-1 human pancreatic cancer cells preferentially under nutrition-deprived conditions at a concentration of 10 microg/mL. Phytochemical investigation led to the isolation of 27 compounds including four new compounds [(3R)-6,4'-dihydroxy-8-methoxyhomoisoflavan (1), (2R)-7,4'-dihydroxy-5-methoxy-8-methylflavan (2), 7-hydroxy-6-methoxy-3-(4'-hydroxybenzyl)coumarin (3), and 6-hydroxy-7-methoxy-3-(4'-hydroxybenzyl)coumarin (4)]. 2',4'-Dihydroxychalcone (8) displayed the most potent preferential cytotoxicity (PC(50) 19.0 microM) against PANC-1 cells. In addition, the cytotoxic activity against colon 26-L5 carcinoma (colon 26-L5), B16-BL6 melanoma (B16-BL6), lung A549 adenocarcinoma (A549), cervix HeLa adenocarcinoma (HeLa), and HT-1080 fibrosarcoma (HT-1080) cell lines and their structure-activity relationship are discussed. The cytotoxic activity of 4'-hydroxy-3,5-dimethoxystilbene (6) against colon 26-L5 (IC(50) 2.96 microM) was found to be stronger than the positive control, doxorubicin, at IC(50) 3.12 microM.
authors.affiliation: Institute of Natural Medicine, University of Toyama, 2630-Sugitani, Toyama, Japan.
authors.forename: Suresh
authors.initials: S
authors.lastname: Awale
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Miyamoto
authors.forename: Thein Zaw
authors.initials: TZ
authors.lastname: Linn
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Nwet Nwet
authors.initials: NN
authors.lastname: Win
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tezuka
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Esumi
authors.forename: Shigetoshi
authors.initials: S
authors.lastname: Kadota
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D004317:Doxorubicin / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D005260:Female; D006367:HeLa Cells; D006801:Humans; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D015394:Molecular Structure; D002052:Myanmar; D024301:Plant Bark / Q000737:chemistry; D013237:Stereoisomerism; D013267:Stilbenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology*; D013329:Structure-Activity Relationship
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D003374:Coumarins; D007529:Isoflavones; D013267:Stilbenes; D004317:Doxorubicin