title: Hepatoprotective and anti-Helicobacter pylori activities of constituents from Brazilian propolis.
abstract: Propolis is a resinous hive product collected by honeybees from various plant sources. It is extensively used in food, beverage and in folk medicine for treating various ailments and reported to have broad spectrum of biological activities. The hepatoprotective activity of propolis and constituents from its MeOH extract belonging to various classes were tested on D-galactosamine (D-GalN)/tumor necrosis factor-alpha (TNF-alpha)-induced cell death in primary cultured mouse hepatocytes. The result indicated that hepatoprotective activity of alcoholic extract of tropical Brazilian propolis is mainly due to phenolic compounds including flavonoids. All the four isolated flavonoids possessed stronger inhibitory activity (IC50, < 25 microM) than silibinin (IC50, 39.6 microM) on TNF-alpha-induced cell death. The labdane-type diterpenes isolated from the MeOH extract also exhibited significant hepatoprotective activity in the same experimental model. Moreover, the labdane-type diterpenes and some of the prenylated phenolic compounds possessed antibacterial activity against Helicobacter pylori.
authors: Department of Natural Products Chemistry, Institute of Natural Medicine, Toyama Medical and Pharmaceutical University, Japan.
authors: A H
authors: AH
authors: Banskota
authors: Y
authors: Y
authors: Tezuka
authors: I K
authors: IK
authors: Adnyana
authors: E
authors: E
authors: Ishii
authors: K
authors: K
authors: Midorikawa
authors: K
authors: K
authors: Matsushige
authors: S
authors: S
authors: Kadota
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D016588:Anticarcinogenic Agents / Q000737:chemistry / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects*; D002478:Cells, Cultured / Q000187:drug effects; D005688:Galactosamine; D016480:Helicobacter pylori / Q000187:drug effects*; D022781:Hepatocytes / Q000187:drug effects*; D051379:Mice; D008826:Microbial Sensitivity Tests; D011429:Propolis / Q000737:chemistry / Q000494:pharmacology*; D014409:Tumor Necrosis Factor-alpha
chemical_list: D000900:Anti-Bacterial Agents; D016588:Anticarcinogenic Agents; D014409:Tumor Necrosis Factor-alpha; D005688:Galactosamine; D011429:Propolis