title: Triphlorethol-A from Ecklonia cava protects V79-4 lung fibroblast against hydrogen peroxide induced cell damage.
abstract: In the present study, triphlorethol-A, a phlorotannin, was isolated from Ecklonia cava and its antioxidant properties were investigated. Triphlorethol-A was found to scavenge intracellular reactive oxygen species (ROS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, and thus prevented lipid peroxidation. The radical scavenging activity of triphlorethol-A protected the Chinese hamster lung fibroblast (V79-4) cells exposed to hydrogen peroxide (H2O2) against cell death, via the activation of ERK protein. Furthermore, triphlorethol-A reduced the apoptotic cells formation induced by H2O2. Triphlorethol-A increased the activities of cellular antioxidant enzymes like, superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx). Hence, from the present study, it is suggestive that triphlorethol-A protects V79-4 cells against H2O2 damage by enhancing the cellular antioxidative activity.
authors.affiliation: Department of Biochemistry, College of Medicine and Applied Radiological Science Research Institute, Cheju National University, Jeju-si, 690-756, South Korea.
authors.forename: Kyoung Ah
authors.initials: KA
authors.lastname: Kang
authors.forename: Kyoung Hwa
authors.initials: KH
authors.lastname: Lee
authors.forename: Sungwook
authors.initials: S
authors.lastname: Chae
authors.forename: Young Sang
authors.initials: YS
authors.lastname: Koh
authors.forename: Byoung-Sam
authors.initials: BS
authors.lastname: Yoo
authors.forename: Ju Ho
authors.initials: JH
authors.lastname: Kim
authors.forename: Young Min
authors.initials: YM
authors.lastname: Ham
authors.forename: Jong Seok
authors.initials: JS
authors.lastname: Baik
authors.forename: Nam Ho
authors.initials: NH
authors.lastname: Lee
authors.forename: Jin Won
authors.initials: JW
authors.lastname: Hyun
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000302:isolation & purification / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D015153:Blotting, Western; D002470:Cell Survival / Q000187:drug effects; D002478:Cells, Cultured; D019610:Cytoprotection / Q000187:drug effects; D004789:Enzyme Activation / Q000187:drug effects; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism; D005434:Flow Cytometry; D016166:Free Radical Scavengers / Q000302:isolation & purification / Q000494:pharmacology; D005979:Glutathione Peroxidase / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects; D008168:Lung / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D000459:Phaeophyceae / Q000737:chemistry; D010696:Phloroglucinol / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000494:pharmacology; D017382:Reactive Oxygen Species / Q000378:metabolism
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers; D017382:Reactive Oxygen Species; C504400:triphlorethol-A; D006861:Hydrogen Peroxide; D010696:Phloroglucinol; D005979:Glutathione Peroxidase; D048049:Extracellular Signal-Regulated MAP Kinases