title: Cytotoxic triterpenoids from the fruits of Zizyphus jujuba.
abstract: The following eleven triterpenoic acids were isolated from the fruits of Zizyphus jujuba (Rhamnaceae): colubrinic acid, alphitolic acid, 3-O-cis-p-coumaroylalphitolic acid (3), 3-O-trans-p-coumaroylalphitolic acid (4), 3-O-cis-p-coumaroylmaslinic acid, 3-O-trans-p-coumaroylmaslinic acid, betulinic acid (7), oleanolic acid, betulonic acid (9), oleanonic acid and zizyberenalic acid. The in vitro cytotoxicities of the triterpenoic acids against K562, B16(F-10), SK-MEL-2, PC-3, LOX-IMVI, and A549 tumor cell lines were investigated by the sulforhodamin B (SRB) method. Among these compounds, the lupane-type triterpenes, such as compounds 3, 4, 7, and 9, showed high cytotoxic activities. In particular, the cytotoxic activities of 3-O-p-coumaroylalphitolic acids (compounds 3 and 4) were better than those of non-coumaroic triterpenenoids (compounds 7 and 9). These results suggest that the coumaroyl moiety at the C-3 position of the lupane-type triterpene may play an important role in enhancing cytotoxic activity.
authors.affiliation: KT&G Central Research Institute, Yuseong, Daejon, Korea.
authors.forename: Sang Myung
authors.initials: SM
authors.lastname: Lee
authors.forename: Bung Sun
authors.initials: BS
authors.lastname: Min
authors.forename: Cheal-Gyu
authors.initials: CG
authors.lastname: Lee
authors.forename: Kab-Sig
authors.initials: KS
authors.lastname: Kim
authors.forename: Yung Hee
authors.initials: YH
authors.lastname: Kho
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology*; D045744:Cell Line, Tumor / Q000187:drug effects; D005638:Fruit; D006801:Humans; D020128:Inhibitory Concentration 50; D008517:Phytotherapy; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D014315:Triterpenes / Q000737:chemistry / Q000494:pharmacology*; D031957:Ziziphus
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts; D014315:Triterpenes