Forskning ved Københavns Universitet - Københavns Universitet


p53-Dependent Nestin Regulation Links Tumor Suppression to Cellular Plasticity in Liver Cancer

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  • Darjus F Tschaharganeh
  • Wen Xue
  • Diego F Calvisi
  • Matthias Evert
  • Tatyana V Michurina
  • Lukas E Dow
  • Ana Banito
  • Sarah F Katz
  • Edward R Kastenhuber
  • Susann Weissmueller
  • Chun-Hao Huang
  • Andre Lechel
  • Andersen, Jesper Bøje
  • David Capper
  • Lars Zender
  • Thomas Longerich
  • Grigori Enikolopov
  • Scott W Lowe

The p53 tumor suppressor coordinates a series of antiproliferative responses that restrict the expansion of malignant cells, and as a consequence, p53 is lost or mutated in the majority of human cancers. Here, we show that p53 restricts expression of the stem and progenitor-cell-associated protein nestin in an Sp1/3 transcription-factor-dependent manner and that Nestin is required for tumor initiation in vivo. Moreover, loss of p53 facilitates dedifferentiation of mature hepatocytes into nestin-positive progenitor-like cells, which are poised to differentiate into hepatocellular carcinomas (HCCs) or cholangiocarcinomas (CCs) in response to lineage-specific mutations that target Wnt and Notch signaling, respectively. Many human HCCs and CCs show elevated nestin expression, which correlates with p53 loss of function and is associated with decreased patient survival. Therefore, transcriptional repression of Nestin by p53 restricts cellular plasticity and tumorigenesis in liver cancer.

Udgave nummer3
Sider (fra-til)579-92
Antal sider14
StatusUdgivet - 31 jul. 2014

ID: 120012112