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- W4387293367 abstract "Abstract DNA replication and repair defects or genotoxic treatments trigger interferon (IFN)-mediated inflammatory responses. However, whether and how IFN signaling in turn impacts the DNA replication process has remained elusive. Here we show that basal levels of the IFN-stimulated gene 15, ISG15, and its conjugation (ISGylation) are essential to protect nascent DNA from degradation. Moreover, IFNβ treatment restores replication fork stability in BRCA1/2-deficient cells, which strictly depends on topoisomerase-1, and rescues lethality of BRCA2-deficient mouse embryonic stem cells. Although IFNβ activates hundreds of genes, these effects are specifically mediated by ISG15 and ISGylation, as their inactivation suppresses the impact of IFNβ on DNA replication. ISG15 depletion significantly reduces cell proliferation rates in human BRCA1-mutated triple-negative, whereas its upregulation results in increased resistance to the chemotherapeutic drug cisplatin in mouse BRCA2-deficient breast cancer cells, respectively. Accordingly, cells carrying BRCA1/2 defects consistently show increased ISG15 levels, which we propose as an in-built mechanism of drug resistance linked to BRCAness." @default.
- W4387293367 created "2023-10-03" @default.
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- W4387293367 date "2023-10-02" @default.
- W4387293367 modified "2023-10-05" @default.
- W4387293367 title "Interferon restores replication fork stability and cell viability in BRCA-defective cells via ISG15" @default.
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- W4387293367 doi "https://doi.org/10.1038/s41467-023-41801-w" @default.
- W4387293367 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37783689" @default.
- W4387293367 hasPublicationYear "2023" @default.
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