Pharmacological boost of DNA damage response and repair by enhanced biogenesis of DNA damage response RNAs
| Autor: | Matteo Cabrini, Fabrizio d'Adda di Fagagna, Sofia Francia, Ubaldo Gioia, Silvia Brambillasca, Corey Winston Jones-Weinert, Flavia Michelini |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Enoxacin DNA End-Joining Repair DNA damage DNA repair lcsh:Medicine 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Humans lcsh:Science Drosha Multidisciplinary biology Chemistry lcsh:R Telomere Cell biology MicroRNAs 030104 developmental biology Cancer cell biology.protein lcsh:Q Homologous recombination Tumor Suppressor p53-Binding Protein 1 030217 neurology & neurosurgery DNA Dicer DNA Damage HeLa Cells Signal Transduction |
| Zdroj: | Scientific Reports, Vol 9, Iss 1, Pp 1-15 (2019) |
| ISSN: | 2045-2322 |
| Popis: | A novel class of small non-coding RNAs called DNA damage response RNAs (DDRNAs) generated at DNA double-strand breaks (DSBs) in a DROSHA- and DICER-dependent manner has been shown to regulate the DNA damage response (DDR). Similar molecules were also reported to guide DNA repair. Here, we show that DDR activation and DNA repair can be pharmacologically boosted by acting on such non-coding RNAs. Cells treated with enoxacin, a compound previously demonstrated to augment DICER activity, show stronger DDR signalling and faster DNA repair upon exposure to ionizing radiations compared to vehicle-only treated cells. Enoxacin stimulates DDRNA production at chromosomal DSBs and at dysfunctional telomeres, which in turn promotes 53BP1 accumulation at damaged sites, therefore in a miRNA-independent manner. Increased 53BP1 occupancy at DNA lesions induced by enoxacin ultimately suppresses homologous recombination, channelling DNA repair towards faster and more accurate non-homologous end-joining, including in post-mitotic primary neurons. Notably, augmented DNA repair stimulated by enoxacin increases the survival also of cancer cells treated with chemotherapeutic agents. |
| Databáze: | OpenAIRE |
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