title: Effects of naringin on hydrogen peroxide-induced cytotoxicity and apoptosis in P388 cells.
abstract: Flavonoids are widely recognized as naturally occurring antioxidants. Naringin (NG) is one of the flavonoid components in citrus fruits such as grapefruit. Hydrogen peroxide (H2O2) causes cytotoxicity through oxidative stress and apoptosis. In this paper, we examined the effects of NG on H2O2-induced cytotoxicity and apoptosis in mouse leukemia P388 cells. Cytotoxicity was determined by mitochondrial activity (MTT assay). Apoptosis and DNA damage were analyzed by measuring chromatin condensation and Comet assay (alkaline single cell gel electrophoresis), respectively. H2O2-induced cytotoxicity was significantly attenuated by NG or the reduced form of glutathione (GSH), a typical intracellular antioxidant. NG suppressed chromatin condensation and DNA damage induced by H2O2. These results indicate that NG from natural products is a useful drug having antioxidant and anti-apoptopic properties.
authors.affiliation: Department of Pharmacology and Toxicology, Cancer Research Institute, Tohoku Pharmaceutical University. syu-kan@tohoku-pharm.ac.jp
authors.forename: Syu-Ichi
authors.initials: S
authors.lastname: Kanno
authors.forename: Ai
authors.initials: A
authors.lastname: Shouji
authors.forename: Keiko
authors.initials: K
authors.lastname: Asou
authors.forename: Masaaki
authors.initials: M
authors.lastname: Ishikawa
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects* / Q000502:physiology; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects / Q000502:physiology; D004249:DNA Damage / Q000187:drug effects / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D044950:Flavanones / Q000494:pharmacology*; D005419:Flavonoids / Q000494:pharmacology; D006861:Hydrogen Peroxide / Q000037:antagonists & inhibitors / Q000633:toxicity*; D007941:Leukemia P388 / Q000473:pathology*; D051379:Mice
chemical_list: D044950:Flavanones; D005419:Flavonoids; D006861:Hydrogen Peroxide; C005274:naringin