title: Antiproliferative constituents from Umbelliferae plants VI. New ursane-type saikosaponin analogs from the fruits of Bupleurum rotundifolium.
abstract: The MeOH extract of the fruits of Bupleurum rotundifolium showed inhibitory activity against human gastric adenocarcinoma (MK-1) cell growth (GI(50): 6.25 microg/ml). From this extract, 10 new ursane-type triterpene glycosides viz. three 3-O-triosides (called rotundifoliosides A, I, and J) of 13beta,28-epoxy-3beta,16alpha-dihydroxyurs-11-ene, two (G and H) of 13beta,28-epoxy-3beta,16alpha,23-trihydroxyurs-11-ene, two (E and F) of 13beta,28-epoxy-3beta,16alpha,21beta-trihydroxyurs-11-ene, two (B and C) of 3beta,11alpha,16alpha,28-tetrahydroxyurs-12-ene, and one (D) of 3beta,11alpha,28-trihydroxy-15alpha,16alpha-epoxyurs-12-ene were isolated in addition to 16 new oleanane-type triterpene glycosides (rotundiosides J-Y), echinocystic acid 3-O-sulfate and 3 known oleanane-type triterpene glycosides (rotundiosides A, F and G). The isolation, structures and antiproliferative activity of the new ursane-type triterpene glycosides against MK-1, human uterus carcinoma (HeLa), and murine melanoma (B16F10) cell lines are described with some comments on the structural requirements for their activity.
authors.affiliation: Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Japan. fujioka@fukuoka-u.ac.jp
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Fujioka
authors.forename: Keisuke
authors.initials: K
authors.lastname: Yoshida
authors.forename: Hiroko
authors.initials: H
authors.lastname: Fujii
authors.forename: Tsuneatsu
authors.initials: T
authors.lastname: Nagao
authors.forename: Hikaru
authors.initials: H
authors.lastname: Okabe
authors.forename: Kunihide
authors.initials: K
authors.lastname: Mihashi
mesh_terms: D000818:Animals; D019661:Apiaceae; D029972:Bupleurum; D005638:Fruit; D006131:Growth Inhibitors / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D051379:Mice; D009828:Oleanolic Acid / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000502:physiology
chemical_list: D006131:Growth Inhibitors; D010936:Plant Extracts; D012503:Saponins; D009828:Oleanolic Acid; C025759:saikosaponin D