期刊
ONCOGENE
卷 35, 期 20, 页码 2592-2601出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/onc.2015.320
关键词
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资金
- AIRC IG Grant [2014-IG15653]
- AIRC 5xmille Grant [9979]
- Fondazione Roma NCDs grant awarded
- AIRC 5xmille Grant
- MRC [MC_UP_A600_1109, MC_U132670600] Funding Source: UKRI
- Medical Research Council [MC_U132670600, MC_UP_A600_1109] Funding Source: researchfish
ZNF281 is a zinc-finger factor involved in the control of cellular stemness and epithelial-mesenchymal transition (EMT). Here, we report that ZNF281 expression increased after genotoxic stress caused by DNA-damaging drugs. Comet assays demonstrated that DNA repair was delayed in cells silenced for the expression of ZNF281 and treated with etoposide. Furthermore, the expression of 10 DNA damage response genes was downregulated in cells treated with etoposide and silenced for ZNF281. In line with this finding, XRCC2 and XRCC4, two genes that take part in homologous recombination and non-homologous end joining, respectively, were transcriptionally activated by ZNF281 through a DNA-binding-dependent mechanism, as demonstrated by luciferase assays and Chromatin crosslinking ImmunoPrecipitation experiments. c-Myc, which also binds to the promoters of XRCC2 and XRCC4, was unable to promote their transcription or to modify ZNF281 activity. Of interest, bioinformatic analysis of 1971 breast cancer patients disclosed a significant correlation between the expression of ZNF281 and that of XRCC2. In summary, our data highlight, for the first time, the involvement of ZNF281 in the cellular response to genotoxic stress through the control exercised on the expression of genes that act in different repair mechanisms.
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