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- W2267202447 abstract "There is an imperious need for the development of novel therapeutics for the treatment of Ewing sarcoma, the second most prevalent solid bone tumour observed in children and young adolescents. Recently, a 4-nitrobenzofuroxan derivative, XI-006 (NSC207895) was shown to diminish MDM4 promoter activity in breast cancer cell lines. As amplification of MDM4 is frequently observed in sarcomas, this study examined the therapeutic potential of XI-006 for the treatment of Ewing and osteosarcoma. XI-006 treatment of Ewing and osteosarcoma cell lines (n = 11) resulted in rapid and potent apoptosis at low micro-molar concentrations specifically in Ewing sarcoma cell lines (48 hr IC50 0.099-1.61 μM). Unexpectedly, apoptotic response was not dependent on MDM4 mRNA/protein levels or TP53 status. Alkaline/neutral comet and γH2AX immunofluorescence assays revealed that the cytotoxic effects of XI-006 could not be attributed to the induction of DNA damage. RNA expression analysis revealed that the mechanism of action of XI-006 could be accredited to the inhibition of cell division and cycle regulators such as KIF20A and GPSM2. Finally, potent synergy between XI-006 and olaparib (PARP inhibitor) were observed due to the down-regulation of Mre11. Our findings suggest that XI-006 represents a novel therapeutic intervention for the treatment of Ewing sarcoma." @default.
- W2267202447 created "2016-06-24" @default.
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- W2267202447 date "2015-06-22" @default.
- W2267202447 modified "2023-09-23" @default.
- W2267202447 title "XI-006 induces potent p53-independent apoptosis in Ewing sarcoma" @default.
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- W2267202447 doi "https://doi.org/10.1038/srep11465" @default.
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