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- W2068291212 abstract "Prolonged mitosis due to aberrant chromosome segregation permits cells to enter the G1 phase without cytokinesis and subsequently triggers the p53-dependent cell death program, known as mitotic catastrophe. Cells which fail to go through mitotic catastrophe create aneuploidy, posing a risk of oncogenesis. In the present report, we show that p62-mediated non-canonical activation of Nrf2 leads to the persistent expression of Nqo1, which plays a critical role for p53 stabilization during mitotic catastrophe. With prolonged exposure to nocodazole, a microtubule-depolymerizing agent, p62-deficient HCT116 cells exhibited an accumulation of a polyploid population with a limited appearance of apoptotic cells, which was attributable to the attenuated stabilization of p53. Combinatorial gene manipulation analysis verified that the regulatory cascade with a hierarchy of p62-Keap1-Nrf2-Nqo1 is required for p53 stabilization for mitotic catastrophe. This is consistent with the role of Nqo1 as a gatekeeper for proteasomal degradation of p53. Thus, we demonstrate for the first time the functional connection between the non-canonical Nrf2 pathway and p53-dependent cell death program upon prolonged mitosis." @default.
- W2068291212 created "2016-06-24" @default.
- W2068291212 creator A5019527287 @default.
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- W2068291212 date "2011-08-01" @default.
- W2068291212 modified "2023-09-26" @default.
- W2068291212 title "Persistent expression of Nqo1 by p62-mediated Nrf2 activation facilitates p53-dependent mitotic catastrophe" @default.
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- W2068291212 doi "https://doi.org/10.1016/j.bbrc.2011.07.101" @default.
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