title: Antimutagenicity and DT-diaphorase inducing activity of Gynostemma pentaphyllum Makino extract.
abstract: The hot water extract of the herbal tea, Gynostemma pentaphyllum Makino, was not found to be mutagenic in Salmonella mutation assay with or without metabolic activation. However, the extract had both DT-diaphorase inducing activity in the murine hepatoma (Hepa1c1c7) cell line and antimutagenic properties towards chemical-induced mutation in Salmonella typhimurium strains TA98 and TA100. Mutagenicity of aflatoxin B1 (AFB1), 2-amino-6-methyldipyrido [1, 2-a: 3', 2', 3-d] imidazole (Glu-P-1), 2-aminodipyrido [1, 2-a: 3', 2', 3-d] imidazole (GIu-P-2), 2-amino-1, 4-dimethyl-5H-pyrido [4, 3-b] indole (Trp-P-1), 3-amino-1-methyl-5H-pyrido [4, 3-b] indole (Trp-P-2), 2-amino-3-methylimidazo [4, 5-f] quinoline (IQ) and Benzo [a] pyrene (B[a]P) was inhibited by the extract of Gynostemma pentaphyllum Makino in a dose-dependent manner, but no effect was found on the mutagenic activity of 2-(2-Furyl)-3-(5-nitro-2-furyl) acrylamide (AF-2). However, the extract enhanced the mutagenicity induced by 2-aminoanthracene (2AA), and N-methyl-N-nitro-N-nitrosoguanidine (MNNG).
authors.affiliation: Department of Biochemistry, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand.
authors.forename: Chollada
authors.initials: C
authors.lastname: Kulwat
authors.forename: Nirush
authors.initials: N
authors.lastname: Lertprasertsuke
authors.forename: Pranee
authors.initials: P
authors.lastname: Leechanachai
authors.forename: Prachya
authors.initials: P
authors.lastname: Kongtawelert
authors.forename: Usanee
authors.initials: U
authors.lastname: Vinitketkumnuen
mesh_terms: D000818:Animals; D016588:Anticarcinogenic Agents / Q000494:pharmacology; D016587:Antimutagenic Agents / Q000494:pharmacology*; D002460:Cell Line; D004790:Enzyme Induction / Q000187:drug effects; D029774:Gynostemma; D051379:Mice; D009152:Mutagenicity Tests; D009153:Mutagens / Q000633:toxicity; D016660:NAD(P)H Dehydrogenase (Quinone) / Q000096:biosynthesis*; D010936:Plant Extracts / Q000494:pharmacology; D012486:Salmonella typhimurium / Q000187:drug effects / Q000235:genetics
chemical_list: D016588:Anticarcinogenic Agents; D016587:Antimutagenic Agents; D009153:Mutagens; D010936:Plant Extracts; D016660:NAD(P)H Dehydrogenase (Quinone)