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Brockmann, Markus; Poon, Evon; Berry, Teeara; Carstensen, Anne; Deubzer, Hedwig E.; Rycak, Lukas; Jamin, Yann; Thway, Khin; Robinson, Simon P.; Roels, Frederik; Witt, Olaf; Fischer, Matthias; Chesler, Louis; Eilers, Martin
Cancer cell, 07/2013, Letnik: 24, Številka: 1Journal Article
Amplification of MYCN is a driver mutation in a subset of human neuroendocrine tumors, including neuroblastoma. No small molecules that target N-Myc, the protein encoded by MYCN, are clinically available. N-Myc forms a complex with the Aurora-A kinase, which protects N-Myc from proteasomal degradation. Although stabilization of N-Myc does not require the catalytic activity of Aurora-A, we show here that two Aurora-A inhibitors, MLN8054 and MLN8237, disrupt the Aurora-A/N-Myc complex and promote degradation of N-Myc mediated by the Fbxw7 ubiquitin ligase. Disruption of the Aurora-A/N-Myc complex inhibits N-Myc-dependent transcription, correlating with tumor regression and prolonged survival in a mouse model of MYCN-driven neuroblastoma. We conclude that Aurora-A is an accessible target that makes destabilization of N-Myc a viable therapeutic strategy. •Aurora-A-specific inhibitors disrupt the Aurora-A/N-Myc complex•Inhibitors trigger proteasomal degradation of N-Myc via Fbxw7 ubiquitin ligase•Inhibitors revert N-Myc-dependent gene expression in a mouse model of neuroblastoma•Inhibitors induce tumor regression and extend survival in this model
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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