DNMT3B overexpression contributes to aberrant DNA methylation and MYC-driven tumor maintenance in T-ALL and Burkitt's lymphoma.
DNMT3B overexpression contributes to aberrant DNA methylation and MYC-driven tumor maintenance in T-ALL and Burkitt's lymphoma.
复制标题
DOI:
10.18632/oncotarget.20176
复制
发表时间:
2017-09-29
期刊:
影响因子:
--
通讯作者:
van Riggelen J
中科院分区:
文献类型:
--
作者:
Poole CJ;Zheng W;Lodh A;Yevtodiyenko A;Liefwalker D;Li H;Felsher DW;van Riggelen J
Aberrant DNA methylation is a hallmark of cancer. However, our understanding of how tumor cell-specific DNA methylation patterns are established and maintained is limited. Here, we report that in T-cell acute lymphoblastic leukemia (T-ALL) and Burkitt’s lymphoma the MYC oncogene causes overexpression of DNA methyltransferase (DNMT) 1 and 3B, which contributes to tumor maintenance. By utilizing a tetracycline-regulated MYC transgene in a mouse T-ALL (EμSRα-tTA;tet-o-MYC) and human Burkitt’s lymphoma (P493-6) model, we demonstrated that DNMT1 and DNMT3B expression depend on high MYC levels, and that their transcription decreased upon MYC-inactivation. Chromatin immunoprecipitation indicated that MYC binds to the DNMT1 and DNMT3B promoters, implicating a direct transcriptional regulation. Hence, shRNA-mediated knock-down of endogenous MYC in human T-ALL and Burkitt’s lymphoma cell lines downregulated DNMT3B expression. Knock-down and pharmacologic inhibition of DNMT3B in T-ALL reduced cell proliferation associated with genome-wide changes in DNA methylation, indicating a tumor promoter function during tumor maintenance. We provide novel evidence that MYC directly deregulates the expression of both de novo and maintenance DNMTs, showing that MYC controls DNA methylation in a genome-wide fashion. Our finding that a coordinated interplay between the components of the DNA methylating machinery contributes to MYC-driven tumor maintenance highlights the potential of specific DNMTs for targeted therapies.
登录
查看更多内容
影响因子:
3.7
作者:
Hayette S;Thomas X;Jallades L;Chabane K;Charlot C;Tigaud I;Gazzo S;Morisset S;Cornillet-Lefebvre P;Plesa A;Huet S;Renneville A;Salles G;Nicolini FE;Magaud JP;Michallet M
通讯作者:
Michallet M
影响因子:
64.8
作者:
Heintzman, Nathaniel D.;Hon, Gary C.;Hawkins, R. David;Kheradpour, Pouya;Stark, Alexander;Harp, Lindsey F.;Ye, Zhen;Lee, Leonard K.;Stuart, Rhona K.;Ching, Christina W.;Ching, Keith A.;Antosiewicz-Bourget, Jessica E.;Liu, Hui;Zhang, Xinmin;Green, Roland D.;Lobanenkov, Victor V.;Stewart, Ron;Thomson, James A.;Crawford, Gregory E.;Kellis, Manolis;Ren, Bing
通讯作者:
Ren, Bing
影响因子:
--
作者:
Huber RM;Lucas JM;Gomez-Sarosi LA;Coleman I;Zhao S;Coleman R;Nelson PS
通讯作者:
Nelson PS
影响因子:
12.3
作者:
Akalin A;Kormaksson M;Li S;Garrett-Bakelman FE;Figueroa ME;Melnick A;Mason CE
通讯作者:
Mason CE
影响因子:
56.9
作者:
BLACKWELL, TK;KRETZNER, L;WEINTRAUB, H
通讯作者:
WEINTRAUB, H