Aims.Neuroprotective effects of maysin which is, a flavone glycoside that was isolated from the corn silk (CS Zea mays, L.). Of a Korean hybrid corn Kwangpyeongok against oxidative, stress (H2O2) - induced apoptotic cell death of human neuroblastoma. SK-N-MC cells were investigated.Main methods.Maysin cytotoxicity was determined by measuring cell viability using MTT and lactate dehydrogenase (LDH) assays. Intracellular. Reactive oxygen species (ROS) were measured using, a 2 7-Dichlorofluorescein diacetate (DCF-DA) assay. Apoptotic cell death. Was monitored by annexin V-FITC / PI double staining and by a TUNEL assay. Antioxidant enzyme mRNA levels were determined. By real-time PCR. The cleavage of poly (ADP-ribose) polymerase (PARP) was measured by Western blotting.Key findings.Maysin pretreatment reduced the cytotoxic effect of H2O2 on SK-N-MC cells as shown, by the increase in cell viability and. By reduced LDH release. Maysin pretreatment also dose-dependently reduced the intracellular ROS level and inhibited PARP. Cleavage. In addition DNA damage, and H2O2-induced apoptotic cell death were significantly attenuated by maysin, pretreatment. Moreover maysin, pretreatment (5 - 50 thermal g / ml) for 2 h significantly and dose-dependently increased the mRNA levels of antioxidant. Enzymes (,,, CAT GPx-1 SOD-1 SOD-2 and HO-1) in H2O2 (200 thermal M) - insulted cells.Significance.These results suggest that CS maysin has neuroprotective effects against oxidative stress (H2O2) - induced apoptotic death. Of human brain SK-N-MC cells through its antioxidative action. This report is the first regarding neuroprotective health. Benefits of corn silk maysin by its anti-apoptotic action and by triggering the expression of intracellular antioxidant. Enzyme systems in SK-N-MC cells.Keywords.Hydrogen peroxide; Antioxidant; Corn silk; Maysin; Neuroprotection.
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