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• W2038691856 startingPage "9873" @default.
• W2038691856 abstract "Nuclear transcription factor Nrf2 regulates the expression and coordinated induction of a battery of genes encoding cytoprotective and drug transporter proteins in response to chemical and radiation stress. This leads to reduced apoptosis, enhanced cell survival, and increased drug resistance. In this study, we investigated the role of Nrf2 in up-regulation of antiapoptotic protein Bcl-2 and its contribution to stress-induced apoptosis and cell survival. Exposure of mouse hepatoma (Hepa-1) and human hepatoblastoma (HepG2) cells to antioxidant tert-butylhydroquinone led to induction of Bcl-2. Mutagenesis and transfection assays identified an antioxidant response element between nucleotides -3148 and -3140 on the reverse strand of the Bcl-2 gene promoter that was essential for activation of Bcl-2 gene expression. Band/supershift and ChIP assays demonstrated binding of Nrf2 to Bcl-2 antioxidant response element. Alterations in Nrf2 led to altered Bcl-2 induction and cellular apoptosis. Moreover, dysfunctional/mutant inhibitor of Nrf2 (INrf2) in human lung cancer cells failed to degrade Nrf2, resulting in an increased Bcl-2 level and decreased etoposide- and UV/γ radiation-mediated DNA fragmentation. In addition, siRNA-mediated down-regulation of Nrf2 also led to decreased apoptosis and increased cell survival. Furthermore, the specific knockdown of Bcl-2 in Nrf2-activated tumor cells led to increased etoposide-induced apoptosis and decreased cell survival and growth/proliferation. These data provide the first evidence of Nrf2 in control of Bcl-2 expression and apoptotic cell death with implications in antioxidant protection, survival of cancer cells, and drug resistance." @default.
• W2038691856 created "2016-06-24" @default.
• W2038691856 creator A5027903995 @default.
• W2038691856 creator A5036950952 @default.
• W2038691856 date "2012-03-01" @default.
• W2038691856 modified "2023-10-16" @default.
• W2038691856 title "Nrf2 Protein Up-regulates Antiapoptotic Protein Bcl-2 and Prevents Cellular Apoptosis" @default.
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• W2038691856 doi "https://doi.org/10.1074/jbc.m111.312694" @default.
• W2038691856 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3323009" @default.
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• W2038691856 hasPublicationYear "2012" @default.
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