title: Anti-tumor promoters phenolics and triterpenoid from Hippophae rhamnoides.
abstract: A 70% ethanol extract of the branches of Hippophae rhamnoides exhibited remarkable antitumor activity in an in vivo two-stage carcinogenesis test in mice using 7,12-dimethylbenz[a]anthracene as an initiator and 12-O-tetradecanoylphorbol-13-acetate (TPA) as a promoter. From the active fraction of the 70% ethanol extract, three phenolic compounds, (+)-catechin (1), (+)-gallocatechin (2), and (-)-epigallocatechin (3) and a tritepenoid, ursolic acid (4) were isolated and identified. These compounds were evaluated for their inhibitory effects on TPA-induced inflammation (1 microg/ear) in mice. Within the tested compounds, 3 and 4 showed marked anti-inflammatory effects, with a 50% inhibitory dose of 1.7 and 0.2 mumol/ear.
authors.affiliation: College of Pharmacy, Nihon University, Chiba 274-8555, Japan. yasukawa.ken@nihon-u.ac.jp
authors.forename: Ken
authors.initials: K
authors.lastname: Yasukawa
authors.forename: Susumu
authors.initials: S
authors.lastname: Kitanaka
authors.forename: Kenji
authors.initials: K
authors.lastname: Kawata
authors.forename: Kumiko
authors.initials: K
authors.lastname: Goto
mesh_terms: D015127:9,10-Dimethyl-1,2-benzanthracene; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D000972:Antineoplastic Agents, Phytogenic / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D002392:Catechin / Q000031:analogs & derivatives / Q000494:pharmacology / Q000627:therapeutic use*; D005260:Female; D031281:Hippophae / Q000737:chemistry*; D007249:Inflammation / Q000139:chemically induced / Q000188:drug therapy; D051379:Mice; D008813:Mice, Inbred ICR; D008517:Phytotherapy; D010936:Plant Extracts / Q000302:isolation & purification / Q000494:pharmacology / Q000627:therapeutic use*; D018547:Plant Stems; D012878:Skin Neoplasms / Q000139:chemically induced / Q000188:drug therapy*; D013755:Tetradecanoylphorbol Acetate
chemical_list: D000893:Anti-Inflammatory Agents; D000972:Antineoplastic Agents, Phytogenic; D010936:Plant Extracts; D015127:9,10-Dimethyl-1,2-benzanthracene; D002392:Catechin; D013755:Tetradecanoylphorbol Acetate