title: DNA damage in human T-lymphoblastoid cell line Molt-3 induced by reactive oxygen species.
abstract: In the course of studying the effect of reactive oxygen species such as superoxide anion (O2-), hydrogen peroxide (H2O2) on oxidant-sensitive human T-lymphoblastoid cell line Molt-3, O2- has been generated by the interaction of xanthine with xanthine oxidase (XOD). To confirm that H2O2 is a key intermediate for inducing DNA single-strand breaks in Molt-3 cells, studies have been carried out with pure H2O2. In the presence of xanthine + XOD or H2O2 the amount of DNA single-strand breaks has been found to increase as a function of the O2- and H2O2 concentration. Data from studies with antioxidants such as superoxide dismutase and catalase supports a mechanism of DNA damage dependent on the presence of H2O2 in Molt-3 cells. Molt-3 cells are CD4+ and sensitive to reactive oxygen stress and therefore, could be an ideal cell line for determining the relationship between oxidative stress and various diseases such as acquired immunodeficiency syndrome (AIDS).
authors.affiliation: Biomedical Sciences Research Center, University of Ulster, Coleraine, Northern Ireland, UK.
authors.forename: S
authors.initials: S
authors.lastname: Ranjbar
authors.forename: B M
authors.initials: BM
authors.lastname: Hannigan
mesh_terms: D015496:CD4-Positive T-Lymphocytes / Q000187:drug effects*; D002374:Catalase / Q000378:metabolism; D002460:Cell Line; D004249:DNA Damage; D006801:Humans; D006861:Hydrogen Peroxide / Q000494:pharmacology; D017382:Reactive Oxygen Species / Q000494:pharmacology*; D013482:Superoxide Dismutase / Q000378:metabolism; D014969:Xanthine Oxidase / Q000494:pharmacology
chemical_list: D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide; D002374:Catalase; D013482:Superoxide Dismutase; D014969:Xanthine Oxidase