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Defining and Modulating 'BRCAness'
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DOI：10.1016/j.tcb.2019.06.005.png)
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摘要
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The concept of 'BRCAness' defines the pathogenesis and vulnerability of multiple cancers. The canonical definition of BRCAness is a defect in homologous recombination repair, mimicking BRCA1 or BRCA2 loss. In turn, BRCA-deficient cells utilize error-prone DNA-repair pathways, causing increased genomic instability, which may be responsible for their sensitivity to DNA damaging agents and poly-(ADP)-ribose polymerase inhibitors (PARPis). However, recent work has expanded the mechanistic basis of BRCAness, to include defects in replication fork protection (RFP). Here, we broaden the definition of BRCAness to include RFP and regulatory mechanisms that cause synthetic lethality with PARPis. We highlight these recent discoveries, which include mechanisms of RFP regulation, DNA damage checkpoint proteins, as well as kinases that regulate BRCA1/2 function. Importantly, many of these emerging mechanisms may be targeted for inhibition with small molecule inhibitors, thus inducing BRCAness in a much larger subset of BRCA-proficient tumors, with significant translational potential.
Keyword:
REPLICATION FORK STABILITY
HOMOLOGOUS RECOMBINATION
CELL-CYCLE
COMBINED INHIBITION
MRE11-DEPENDENT DEGRADATION
WEE1 KINASE
DNA
BRCA2
AURORA
ATR
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18.1
论文数:
3.1K
被引数:
2.0W
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