EWS-FLI1 increases transcription to cause R-loops and block BRCA1 repair in Ewing sarcoma.
EWS-FLI1 increases transcription to cause R-loops and block BRCA1 repair in Ewing sarcoma.
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DOI:
10.1038/nature25748
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发表时间:
2018-03-15
期刊:
影响因子:
64.8
通讯作者:
Bishop AJR
中科院分区:
文献类型:
--
作者:
Gorthi A;Romero JC;Loranc E;Cao L;Lawrence LA;Goodale E;Iniguez AB;Bernard X;Masamsetti VP;Roston S;Lawlor ER;Toretsky JA;Stegmaier K;Lessnick SL;Chen Y;Bishop AJR
Ewing sarcoma is an aggressive paediatric cancer of the bone and soft tissue. It results from a chromosomal translocation, predominantly t(11;22)(q24:q12), that fuses the N-terminal transactivation domain of the constitutively expressed EWSR1 protein with the C-terminal DNA binding domain of the rarely expressed FLI1 protein. Ewing sarcoma is highly sensitive to genotoxic agents such as etoposide, but the underlying molecular basis of this sensitivity is unclear. Here we show that Ewing sarcoma cells display alterations in regulation of damage-induced transcription, accumulation of R-loops and increased replication stress. In addition, homologous recombination is impaired in Ewing sarcoma owing to an enriched interaction between BRCA1 and the elongating transcription machinery. Finally, we uncover a role for EWSR1 in the transcriptional response to damage, suppressing R-loops and promoting homologous recombination. Our findings improve the current understanding of EWSR1 function, elucidate the mechanistic basis of the sensitivity of Ewing sarcoma to chemotherapy (including PARP1 inhibitors) and highlight a class of BRCA-deficient-like tumours.
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DOI:
10.1504/ijcbdd.2017.10004580
发表时间:
2017-01-01
影响因子:
--
作者:
Liu, Rongjie;Gorthi, Aparna;Chen, Yidong
通讯作者:
Chen, Yidong
影响因子:
16
作者:
Hatchi, Elodie;Skourti-Stathaki, Konstantina;Ventz, Steffen;Pinello, Luca;Yen, Angela;Kamieniarz-Gdula, Kinga;Dimitrov, Stoil;Pathania, Shailja;McKinney, Kristine M.;Eaton, Matthew L.;Kellis, Manolis;Hill, Sarah J.;Parmigiani, Giovanni;Proudfoot, Nicholas J.;Livingston, David M.
通讯作者:
Livingston, David M.
影响因子:
16
作者:
Escribano-Diaz, Cristina;Orthwein, Alexandre;Durocher, Daniel
通讯作者:
Durocher, Daniel
影响因子:
16
作者:
Ginno PA;Lott PL;Christensen HC;Korf I;Chédin F
通讯作者:
Chédin F
影响因子:
50.3
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
通讯作者:
Rivera MN