Bach1 inhibits oxidative stress-induced cellular senescence by impeding p53 function on chromatin

Yoshihiro Dohi, Tsuyoshi Ikura, Yutaka Hoshikawa, Yasutake Katoh, Kazushige Ota, Ayako Nakanome, Akihiko Muto, Shinji Omura, Tsutomu Ohta, Akihiro Ito, Minoru Yoshida, Tetsuo Noda, Kazuhiko Igarashi

Research output: Contribution to journalArticlepeer-review

80 Citations (Scopus)


Cellular senescence is one of the key strategies to suppress expansion of cells with mutations. Senescence is induced in response to genotoxic and oxidative stress. Here we show that the transcription factor Bach1 (BTB and CNC homology 1, basic leucine zipper transcription factor 1), which inhibits oxidative stress-inducible genes, is a crucial negative regulator of oxidative stress-induced cellular senescence. Bach1-deficient murine embryonic fibroblasts showed a propensity to undergo more rapid and profound p53-dependent premature senescence than control wild-type cells in response to oxidative stress. Bach1 formed a complex that contained p53, histone deacetylase 1 and nuclear co-repressor N-coR. Bach1 was recruited to a subset of p53 target genes and contributed to impeding p53 action by promoting histone deacetylation. Because Bach1 is regulated by oxidative stress and heme, our data show that Bach1 connects oxygen metabolism and cellular senescence as a negative regulator of p53.

Original languageEnglish
Pages (from-to)1246-1254
Number of pages9
JournalNature Structural and Molecular Biology
Issue number12
Publication statusPublished - 2008 Dec


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