EWS-FLI1 utilizes divergent chromatin remodeling mechanisms to directly activate or repress enhancer elements in Ewing sarcoma.
EWS-FLI1 utilizes divergent chromatin remodeling mechanisms to directly activate or repress enhancer elements in Ewing sarcoma.
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DOI:
10.1016/j.ccell.2014.10.004
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发表时间:
2014-11-10
期刊:
影响因子:
50.3
通讯作者:
Rivera MN
中科院分区:
文献类型:
--
作者:
Riggi N;Knoechel B;Gillespie SM;Rheinbay E;Boulay G;Suvà ML;Rossetti NE;Boonseng WE;Oksuz O;Cook EB;Formey A;Patel A;Gymrek M;Thapar V;Deshpande V;Ting DT;Hornicek FJ;Nielsen GP;Stamenkovic I;Aryee MJ;Bernstein BE;Rivera MN
The aberrant transcription factor EWS-FLI1 drives Ewing sarcoma yet its molecular function is incompletely understood. We find that EWS-FLI1 reprograms gene regulatory circuits in Ewing sarcoma by directly inducing or repressing enhancers. At GGAA repeat elements, which lack evolutionary conservation and regulatory potential in other cell types, EWS-FLI1 multimers induce chromatin opening and create de novo enhancers that physically interact with target promoters. Conversely, EWS-FLI1 inactivates conserved enhancers containing canonical ETS motifs by displacing wild type ETS transcription factors. These divergent chromatin-remodeling patterns repress tumor suppressors and mesenchymal lineage regulators, while activating oncogenes and new potential therapeutic targets, such as the kinase VRK1. Our findings demonstrate how EWS-FLI1 establishes an oncogenic regulatory program governing both tumor survival and differentiation.
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通讯作者:
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