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• W3000950386 endingPage "101440" @default.
• W3000950386 startingPage "101440" @default.
• W3000950386 abstract "Alterations in the NRF2/KEAP1 pathway result in the constitutive activation of NRF2, leading to the aberrant induction of antioxidant and detoxification enzymes, including NQO1. The NQO1 bioactivatable agent β-lapachone can target cells with high NQO1 expression but relies in the generation of reactive oxygen species (ROS), which are actively scavenged in cells with NRF2/KEAP1 mutations. However, whether NRF2/KEAP1 mutations influence the response to β-lapachone treatment remains unknown. To address this question, we assessed the cytotoxicity of β-lapachone in a panel of NSCLC cell lines bearing either wild-type or mutant KEAP1. We found that, despite overexpression of NQO1, KEAP1 mutant cells were resistant to β-lapachone due to enhanced detoxification of ROS, which prevented DNA damage and cell death. To evaluate whether specific inhibition of the NRF2-regulated antioxidant enzymes could abrogate resistance to β-lapachone, we systematically inhibited the four major antioxidant cellular systems using genetic and/or pharmacologic approaches. We demonstrated that inhibition of the thioredoxin-dependent system or copper-zinc superoxide dismutase (SOD1) could abrogate NRF2-mediated resistance to β-lapachone, while depletion of catalase or glutathione was ineffective. Interestingly, inhibition of SOD1 selectively sensitized KEAP1 mutant cells to β-lapachone exposure. Our results suggest that NRF2/KEAP1 mutational status might serve as a predictive biomarker for response to NQO1-bioactivatable quinones in patients. Further, our results suggest SOD1 inhibition may have potential utility in combination with other ROS inducers in patients with KEAP1/NRF2 mutations." @default.
• W3000950386 created "2020-01-30" @default.
• W3000950386 creator A5006969385 @default.
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• W3000950386 date "2020-02-01" @default.
• W3000950386 modified "2023-10-01" @default.
• W3000950386 title "Inhibition of TXNRD or SOD1 overcomes NRF2-mediated resistance to β-lapachone" @default.
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• W3000950386 doi "https://doi.org/10.1016/j.redox.2020.101440" @default.
• W3000950386 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6997906" @default.
• W3000950386 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32007910" @default.
• W3000950386 hasPublicationYear "2020" @default.
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