SIRT2-mediated inactivation of p73 is required for glioblastoma tumorigenicity

Kosuke Funato, Tomoatsu Hayashi, Kanae Echizen, Lumi Negishi, Naomi Shimizu, Ryo Koyama-Nasu, Yukiko Nasu-Nishimura, Yasuyuki Morishita, Viviane Tabar, Tomoki Todo, Yasushi Ino, Akitake Mukasa, Nobuhito Saito, Tetsu Akiyama

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Glioblastoma is one of the most aggressive forms of cancers and has a poor prognosis. Genomewide analyses have revealed that a set of core signaling pathways, the p53, RB, and RTK pathways, are commonly deregulated in glioblastomas. However, the molecular mechanisms underlying the tumorigenicity of glioblastoma are not fully understood. Here, we show that the lysine deacetylase SIRT2 is required for the proliferation and tumorigenicity of glioblastoma cells, including glioblastoma stem cells. Furthermore, we demonstrate that SIRT2 regulates p73 transcriptional activity by deacetylation of its C-terminal lysine residues. Our results suggest that SIRT2-mediated inactivation of p73 is critical for the proliferation and tumorigenicity of glioblastoma cells and that SIRT2 may be a promising molecular target for the therapy of glioblastoma.

Original languageEnglish
Article numbere45587
JournalEMBO Reports
Volume19
Issue number11
DOIs
StatePublished - Nov 2018
Externally publishedYes

Keywords

  • cancer stem cells
  • glioblastoma
  • p73
  • SIRT2

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