Genetic inactivation of the polycomb repressive complex 2 in T cell acute lymphoblastic leukemia.
Genetic inactivation of the polycomb repressive complex 2 in T cell acute lymphoblastic leukemia.
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T-cell acute lymphoblastic leukemia (T-ALL) is an immature hematopoietic malignancy driven mainly by oncogenic activation of NOTCH1 signaling. In this study we report the presence of loss-of-function mutations and deletions of EZH2 and SUZ12 genes, encoding critical components of the Polycomb Repressive Complex 2 (PRC2) complex, in 25% of T-ALLs. To further study the role of the PRC2 complex in T-ALL, we used NOTCH1-induced animal models of the disease, as well as human T-ALL samples, and combined locus-specific and global analysis of NOTCH1-driven epigenetic changes. These studies demonstrated that activation of NOTCH1 specifically induces loss of the repressive mark lysine-27 tri-methylation of histone 3 (H3K27me3) by antagonizing the activity of the Polycomb Repressive Complex 2 (PRC2) complex. These studies demonstrate a tumor suppressor role for the PRC2 complex in human leukemia and suggest a hitherto unrecognized dynamic interplay between oncogenic NOTCH1 and PRC2 function for the regulation of gene expression and cell transformation.
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影响因子:
64.5
作者:
Peng JC;Valouev A;Swigut T;Zhang J;Zhao Y;Sidow A;Wysocka J
通讯作者:
Wysocka J
影响因子:
11.5
作者:
Chase, Andrew;Cross, Nicholas C. P.
通讯作者:
Cross, Nicholas C. P.
影响因子:
16
作者:
Cao, R;Zhang, Y
通讯作者:
Zhang, Y
影响因子:
64.8
作者:
Santos-Rosa, H;Schneider, R;Kouzarides, T
通讯作者:
Kouzarides, T
DOI:
10.1073/pnas.0606108103
发表时间:
2006-11-28
影响因子:
11.1
作者:
Palomero, Teresa;Lim, Wei Keat;Ferrando, Adolfo A.
通讯作者:
Ferrando, Adolfo A.