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Keap1 regulates both cytoplasmic‐nuclear shuttling and degradation of Nrf2 in response to electrophiles

Itoh, Ken, Wakabayashi, Nobunao, Katoh, Yasutake, Ishii, Tetsuro, O'Connor, Tania, Yamamoto, Masayuki·2003·Genes to Cells

Abstract

Background: Transcription factor Nrf2 regulates the expression of a set of detoxifying and anti‐oxidant enzyme genes. Several lines of evidence suggest that electrophiles and reactive oxygen species liberate Nrf2 from its cytoplasmic repressor Keap1 and provoke the accumulation of Nrf2 in the nucleus. To elucidate the molecular mechanisms as to how Nrf2 is activated by inducers, we examined the cytoplasmic‐nuclear shuttling and turnover of Nrf2. Results: We found that Nrf2 is rapidly degraded through the proteasome pathway, while electrophiles cause Nrf2 nuclear translocation with concomitant stabilization. Crucial to the inducible accumulation of Nrf2 is the enfeebling of the Nrf2–Keap1 interaction by electrophiles. Exploiting mice which have the LacZ reporter gene knocked into the nrf2 locus, we revealed that the inducible accumulation of Nrf2 protein by electrophiles in macrophages and intestinal epithelia could be recapitulated by the Nrf2 N‐terminal region in combination with a nuclear localization signal. We also found constitutive Nrf2 nuclear accumulation in Keap1‐deficient mouse macrophages. Conclusions: Our results highlight the fact that Nrf2 protein turnover is regulated by Keap1 mediated subcellular compartmentalization.

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Metadata

Authors
Itoh, K., Wakabayashi, N., Katoh, Y., Ishii, T., O'Connor, T., & Yamamoto, M.
Venue
Genes to Cells
Publisher
Wiley
Published
2003-03-25
Volume
8
Issue
4
Pages
379-391
ISSN
  • 1356-9597 (ISSN-L)
  • 1365-2443
OpenAlex
W1995445783
Cited by
816
References
5
FWCI
12.01
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Keap1 regulates both cytoplasmic‐nuclear shuttling and degradation of Nrf2 in response to electrophiles. https://app.cochat.ai/papers/10.1046/j.1365-2443.2003.00640.x
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Itoh, K., Wakabayashi, N., Katoh, Y., Ishii, T., O'Connor, T., & Yamamoto, M. (2003). Keap1 regulates both cytoplasmic‐nuclear shuttling and degradation of Nrf2 in response to electrophiles. Genes to Cells. https://doi.org/10.1046/j.1365-2443.2003.00640.x

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