ATM kinase enables the functional axis of YAP, PML and p53 to ameliorate loss of Werner protein-mediated oncogenic senescence

F. Fausti, S. Di Agostino, M. Cioce, P. Bielli, C. Sette, P. P. Pandolfi, M. Oren, M. Sudol, S. Strano, G. Blandino

Research output: Contribution to journalArticle

Abstract

Werner syndrome (WS) results from dysfunction of the WRN protein, and is associated with premature aging and early death. Here we report that loss of WRN function elicits accumulation of the Yes-associated protein (YAP protein), a major effector of the Hippo tumor suppressor pathway, both experimentally and in WS-derived fibroblasts. YAP upregulation correlates with slower cell proliferation and accelerated senescence, which are partially mediated by the formation of a complex between YAP and the PML protein, whose activity promotes p53 activation. The ATM kinase is necessary for YAP and PML accumulation in WRN-depleted cells. Notably, the depletion of either YAP or PML partially impairs the induction of senescence following WRN loss. Altogether, our findings reveal that loss of WRN activity triggers the activation of an ATM-YAP-PML-p53 axis, thereby accelerating cellular senescence. The latter has features of SASP (senescence-associated secretory phenotype), whose protumorigenic properties are potentiated by YAP, PML and p53 depletion.

Original languageEnglish
Pages (from-to)1498-1509
Number of pages12
JournalCell Death and Differentiation
Volume20
Issue number11
DOIs
Publication statusPublished - Nov 2013

Keywords

  • ATM kinase
  • cellular senescence
  • Werner syndrome
  • Yes-associated protein (YAP)

ASJC Scopus subject areas

  • Cell Biology
  • Molecular Biology

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