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- W2034657890 abstract "Reactive oxygen species have been known to cause DNA damage and induce apoptosis. During DNA damage, DNA repair proteins Ku70 and Ku80 prevent cell death, but severe DNA damage beyond the repair capacity of the DNA repair proteins triggers necrosis or apoptosis. Recent reports have shown that NF-kappaB plays a critical role in protecting the cells from apoptosis. We investigated whether glucose oxidase acting on beta-D-glucose (G/GO), which continuously produces H(2)O(2), induces apoptosis, and whether NF-kappaB and Ku are involved in G/GO-induced apoptosis in pancreatic acinar AR42J cells. Electron microscopic observation showed that apoptotic cells with characteristic nuclear condensation and shrinkage as well as large vacuoles were detected after G/GO treatment. G/GO treatment induced apoptotic cell death, as determined by viable cell count and DNA fragmentation. G/GO-induced apoptosis was increased in the cells transfected with the Ku-dominant negative mutant (Ku D/N) and mutated IkappaBalpha gene (IkappaB mt) as compared to the wild-type cells (Wild) and the cells transfected with the control pcDNA3 vector (pcN-3). G/GO treatment caused nuclear loss of both Ku70 and Ku80 in Wild cells and pcN-3 cells. Even without G/GO treatment, nuclear loss of Ku proteins was observed in IkappaB mt cells. These results suggest that oxidative stress-induced reduction of nuclear Ku proteins may cause loss of defense against DNA damage and thus induce apoptosis in pancreatic acinar cells. The novel finding is that nuclear translocation of Ku proteins may be mediated by NF-kappaB." @default.
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- W2034657890 date "2003-12-01" @default.
- W2034657890 modified "2023-09-23" @default.
- W2034657890 title "Role of NF-κB and DNA Repair Protein Ku on Apoptosis in Pancreatic Acinar Cells" @default.
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- W2034657890 doi "https://doi.org/10.1196/annals.1299.044" @default.
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