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聚腺苷二磷酸核糖聚合酶(PARP)将焦点集中在癌症中的复制叉保护上。

PARPi focus the spotlight on replication fork protection in cancer.

机构信息

Department of Cancer Biology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.

出版信息

Nat Cell Biol. 2017 Oct 31;19(11):1309-1310. doi: 10.1038/ncb3638.

DOI:10.1038/ncb3638
PMID:29087384
Abstract

PARP inhibitors (PARPi) kill BRCA1/2-mutated cancers, which become resistant when DNA repair functions are restored. Now, MUS81 nuclease inhibition due to EZH2 downregulation is found to restore DNA replication fork protection but not repair, leading to PARPi-resistance in mutant BRCA2 cells and patients. This challenges the DNA repair dominance in synthetic lethality.

摘要

聚腺苷二磷酸核糖聚合酶(PARP)抑制剂(PARPi)可杀死 BRCA1/2 突变的癌症,当 DNA 修复功能恢复时,这些癌症会产生耐药性。现在,发现由于 EZH2 下调导致 MUS81 核酸内切酶抑制作用,可恢复 DNA 复制叉保护,但不能修复,从而导致突变型 BRCA2 细胞和患者对 PARPi 的耐药性。这对合成致死性中的 DNA 修复优势提出了挑战。

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本文引用的文献

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MRE11 and EXO1 nucleases degrade reversed forks and elicit MUS81-dependent fork rescue in BRCA2-deficient cells.MRE11核酸酶和EXO1核酸酶可降解反向叉状结构,并在BRCA2缺陷细胞中引发MUS81依赖的叉状结构挽救。
Nat Commun. 2017 Oct 16;8(1):860. doi: 10.1038/s41467-017-01180-5.
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EZH2 promotes degradation of stalled replication forks by recruiting MUS81 through histone H3 trimethylation.EZH2 通过招募 MUS81 并通过组蛋白 H3 三甲基化促进停滞复制叉的降解。
Nat Cell Biol. 2017 Nov;19(11):1371-1378. doi: 10.1038/ncb3626. Epub 2017 Oct 16.
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Smarcal1-Mediated Fork Reversal Triggers Mre11-Dependent Degradation of Nascent DNA in the Absence of Brca2 and Stable Rad51 Nucleofilaments.
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Cuproptosis-related lncRNAs potentially predict prognosis and therapy sensitivity of breast cancer.与铜死亡相关的长链非编码RNA可能预测乳腺癌的预后和治疗敏感性。
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Combined inhibition of PARP and EZH2 for cancer treatment: Current status, opportunities, and challenges.PARP和EZH2联合抑制用于癌症治疗:现状、机遇与挑战
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Cancers (Basel). 2022 Sep 23;14(19):4621. doi: 10.3390/cancers14194621.
8
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Front Cell Dev Biol. 2022 Jan 14;9:801200. doi: 10.3389/fcell.2021.801200. eCollection 2021.
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