Abstract:
:Activation of the MLL-ENL-ERtm oncogene initiates aberrant proliferation of myeloid progenitors. Here, we show induction of a fail-safe mechanism mediated by the DNA damage response (DDR) machinery that results in activation of the ATR/ATM-Chk1/Chk2-p53/p21(CIP1) checkpoint and cellular senescence at early stages of cellular transformation caused by a regulatable MLL-ENL-ERtm in mice. Furthermore, we identified the transcription program underlying this intrinsic anticancer barrier, and DDR-induced inflammatory regulators that fine-tune the signaling toward senescence, thereby modulating the fate of MLL-ENL-immortalized cells in a tissue-environment-dependent manner. Our results indicate that DDR is a rate-limiting event for acquisition of stem cell-like properties in MLL-ENL-ERtm-mediated transformation, as experimental inhibition of the barrier accelerated the transition to immature cell states and acute leukemia development.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Takacova S,Slany R,Bartkova J,Stranecky V,Dolezel P,Luzna P,Bartek J,Divoky Vdoi
10.1016/j.ccr.2012.01.021subject
Has Abstractpub_date
2012-04-17 00:00:00pages
517-31issue
4eissn
1535-6108issn
1878-3686pii
S1535-6108(12)00076-1journal_volume
21pub_type
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