Role of the PLA2-independent peroxiredoxin VI activity in the survival of immortalized fibroblasts exposed to cytotoxic oxidative stress.
نویسندگان
چکیده
Peroxiredoxin VI (PrxVI) is a bifunctional enzyme with non-selenium glutathione peroxidase and Ca2+-independent acidic phospholipase A2 activities. We demonstrate that transfection-mediated PrxVI overexpression protects immortalized human WI-38 and murine NIH3T3 fibroblasts against cytotoxic doses of tert-butylhydroperoxide and H2O2. Mutants for either glutathione peroxidase or phospholipase A2 activity show that glutathione peroxidase but not phospholipase A2 activity is required to promote cell survival after stress. Also, ectopic PrxVI overexpression does not protect telomerase-stabilized WI-38 fibroblasts against stress-induced premature senescence.
منابع مشابه
Role of Oxidative Stress in Modulating Unfolded Protein Response Activity in Chronic Myeloid Leukemia Cell Line
Background: Recently, it has been revealed that tyrosine kinase inhibitors (TKIs) act through inducing both oxidative and endoplasmic reticulum (ER) stress in chronic myeloid leukemia cells. However, ER stress signaling triggers both apoptotic and survival processes within cells. Nevertheless, mechanisms by which TKIs avoid the pro-survival effects are not clear. The aim of this study was to ev...
متن کاملInduction of chromosomal aberrations in human primary fibroblasts and immortalized cancer cells exposed to extremely-low-frequency electromagnetic fields
Background: Rapidly increasing possibilities of exposure to environmental extremely low-frequency electromagnetic fields (ELF-EMF) have become a topic of worldwide investigation. Epidemiological and laboratory studies suggest that exposure to ELF-EMF may increase cancer risk therefore assessment of chromosomal damage in various cell lines might be of predictive value for future risk es...
متن کاملPeroxiredoxin 6 attenuates ischemia- and hypoxia-induced liver damage of brain-dead donors
Oxidative stress induced by ischemia and hypoxia in the livers of donors after brain death (DBD) is associated with poor organ function and low patient survival rates in those receiving DBD liver transplants. Peroxiredoxin 6 (Prdx6) can defend cells against liver damage induced by oxidative stress. The present study aimed to investigate the role of Prdx6 in ischemia‑ and hypoxia‑induced liver d...
متن کاملProtective Effect of Epicatechin on Survival of PC12 Neurons Exposed to Valproic Acid
Background and purpose: It is well established that valproic acid (VPA) is teratogenic associated with oxidative stress in humans and in all animal species tested. In this study, considering the chemical composition of catechins, we investigated its protective effect on the survival of PC12 nerve cells exposed to valproic acid. Materials and methods: The protective effects of epicatechin (EC)...
متن کاملProtective Effects of Simvastatin on Cytotoxicity and Oxidative Stress in Human Gingival Fibroblasts Cells Exposed to Venlafaxine
Background and purpose: Venlafaxine is an antidepressant that belongs to the family of selective serotonin and norepinephrine reuptake inhibitor (SNRIs) drugs. Recent studies have indicated that prolonged use of antidepressants leads to a state where increased formation of reactive oxygen species (ROS) overwhelms body antioxidant protection and subsequently induces DNA damage, lipid peroxidatio...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- FEBS letters
دوره 557 1-3 شماره
صفحات -
تاریخ انتشار 2004