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- W3147346923 abstract "AIM To explore sodium selenite induced oxidative stress and apoptosis in human promyelocytic leukemia NB4 cells. METHODS The growth inhibition of NB4 cells was measured by MTT test. Apoptosis was determined morphologically by Giemsa stain and by DNA ladder formation in electrophoresis. Quantitation of apoptosis was determined by percentage of PI stained cells containing subdiploid amount of DNA measured by flow cytometry. Generation of reactive oxidative species (ROS) in NB4 cells was determined by lucigenin dependent chemoluminescent (CL) test. Spectrophotometer was used to measure the level of reduced glutathione, superoxide dismutase (SOD) and glutathione peroxidase in the cell. RESULTS Sodium selenite was shown to inhibit the growth of NB4 cells. Sodium selenite induced apoptosis with dose and time dependency: the ratio of subdiploid cells in control group was 1 3%±0 7%. The 5 μmol·L -1 group was 10 4%±1 4%, 10 μmol·L -1 group was 16%±1%, and the 20 μmol·L -1 group was 27 3%±0 8%. Sodium selenite (≥5 μmol·L -1 ) enhanced the ROS level marke dly in NB4 cells (in 20 μmol·L -1 group ROS level was increased by 17 tim es, compared with control group), accompanied with decrease of reduced intracell ular glutathione. These effects were time and dose dependent. N acytlcystei ne as an antioxidant was found to inhibit sodium selenite induced oxidative str ess and apoptosis in NB4 cells. CONCLUSION Sodium selenite can induce apoptosis of NB4 cells and would possibly be used as an agent for the treatment of malignancy. The main mechanism of action might be related to oxidative stress induced by sodium selenite, thereby, leading to apoptosis as shown in NB4 cells." @default.
- W3147346923 created "2021-04-13" @default.
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- W3147346923 date "2002-01-01" @default.
- W3147346923 modified "2023-09-24" @default.
- W3147346923 title "SODIUM SELENITE-INDUCED OXIDATIVE STRESS AND APOPTOSIS IN HUMAN ACUTE PROMYELOCYTIC LEUKEMIA NB4 CELLS" @default.
- W3147346923 hasPublicationYear "2002" @default.
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