REV7 counteracts DNA double-strand break resection and affects PARP inhibition

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15110%2F15%3A33154262" target="_blank" >RIV/61989592:15110/15:33154262 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/nature14328" target="_blank" >http://dx.doi.org/10.1038/nature14328</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/nature14328" target="_blank" >10.1038/nature14328</a>

Result language
angličtina
Original language name
REV7 counteracts DNA double-strand break resection and affects PARP inhibition
Original language description
Error-free repair of DNA double-strand breaks (DSBs) is achieved by homologous recombination (HR), and BRCA1 is an important factor for this repair pathway(1). In the absence of BRCA1-mediated HR, the administration of PARP inhibitors induces synthetic lethality of tumour cells of patients with breast or ovarian cancers(2,3). Despite the benefit of this tailored therapy, drug resistance can occur by HR restoration(4). Genetic reversion of BRCA1-inactivating mutations can be the underlying mechanism of drug resistance, but this does not explain resistance in all cases(5). In particular, little is known about BRCA1-independent restoration of HR. Here we show that loss of REV7 (also known as MAD2L2) in mouse and human cell lines re-establishes CTIP-dependent endresection of DSBs in BRCA1 deficient cells, leading to HR restoration and PARP inhibitor resistance, which is reversed by ATM kinase inhibition. REV7 is recruited to DSBs in a manner dependent on the H2AX-MDC1-RNF8-RNF168-53BP1 chr
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EB - Genetics and molecular biology
OECD FORD branch
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Project
<a href="/en/project/LO1304" target="_blank" >LO1304: Support of suistainability of the Institute of Molecular and Translational Medicine</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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