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• W2792318744 abstract "Abstract A majority of cases of high-risk neuroblastoma, an embryonal childhood cancer, are driven by MYC or MYCN-driven oncogenic signaling. While considered to be directly “undruggable” therapeutically, MYC and MYCN can be repressed transcriptionally by inhibition of Bromodomain-containing protein 4 (BRD4) or destabilized posttranslationally by inhibition of Aurora Kinase A (AURKA). Preclinical and early-phase clinical studies of BRD4 and AURKA inhibitors, however, show limited efficacy against neuroblastoma when used alone. We report our studies on the concomitant use of the BRD4 inhibitor IBET-151 and AURKA inhibitor alisertib. We show that, in vitro, the drugs act synergistically to inhibit viability in three models of high-risk neuroblastoma. We demonstrate that this synergy is driven, in part, by the ability of IBET-151 to mitigate reflexive upregulation of AURKA, MYC, and MYCN in response to AURKA inhibition. We then demonstrate that IBET-151 and alisertib are effective in prolonging survival in three xenograft neuroblastoma models in vivo, and this efficacy is augmented by the addition of the antitubule chemotherapeutic vincristine. These data suggest that epigenetic and posttranslational inhibition of MYC/MYCN-driven pathways may have significant clinical efficacy against neuroblastoma. Abbreviations AURKA, aurora kinase A; BRD4, Bromodomain-containing protein 4; CI, combination index; F a , fraction affected; LOH, loss of heterozygosity; 11q, long arm of chromosome 11 Funding sources This work was supported by the Families for a Cure foundation (grant number 20064014) and CancerFree Kids (grant number 82178416)." @default.
• W2792318744 created "2018-03-29" @default.
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• W2792318744 date "2018-03-05" @default.
• W2792318744 modified "2023-09-26" @default.
• W2792318744 title "Dual BRD4 and AURKA Inhibition is Synergistic against MYCN-amplified and nonamplified Neuroblastoma" @default.
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• W2792318744 doi "https://doi.org/10.1101/276840" @default.
• W2792318744 hasPublicationYear "2018" @default.
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