Core transcriptional regulatory circuit controlled by the TAL1 complex in human T cell acute lymphoblastic leukemia.

Core transcriptional regulatory circuit controlled by the TAL1 complex in human T cell acute lymphoblastic leukemia.
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人 T 细胞急性淋巴细胞白血病中由 TAL1 复合物控制的核心转录调节回路。

DOI:
10.1016/j.ccr.2012.06.007
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发表时间:
2012-08-14
期刊:
影响因子:
50.3
通讯作者:
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中科院分区:
医学1区
文献类型:
--
作者:
Sanda T;Lawton LN;Barrasa MI;Fan ZP;Kohlhammer H;Gutierrez A;Ma W;Tatarek J;Ahn Y;Kelliher MA;Jamieson CH;Staudt LM;Young RA;Look AT

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致癌转录因子TAL1/SCL在超过40%的人t细胞急性淋巴细胞白血病(T-ALL)病例中异常表达,强调了其在T-ALL分子发病机制中的重要性。在这里,我们确定了TAL1及其调控伙伴HEB、E2A、LMO1/2、GATA3和RUNX1控制的核心转录调控回路。我们发现TAL1与GATA3和RUNX1形成一个正相互连接的自动调节环,TAL1复合体直接激活MYB癌基因,形成一个正前馈调节环,加强和稳定TAL1调节的致癌程序。该通路的关键下游靶点之一是TRIB2基因,该基因受TAL1和E2A/HEB的相反调控,对T-ALL细胞的存活至关重要。
The oncogenic transcription factor TAL1/SCL is aberrantly expressed in over 40% of cases of human T-cell acute lymphoblastic leukemia (T-ALL), emphasizing its importance in the molecular pathogenesis of T-ALL. Here we identify the core transcriptional regulatory circuit controlled by TAL1 and its regulatory partners HEB, E2A, LMO1/2, GATA3 and RUNX1. We show that TAL1 forms a positive interconnected auto-regulatory loop with GATA3 and RUNX1, and that the TAL1 complex directly activates the MYB oncogene, forming a positive feed-forward regulatory loop that reinforces and stabilizes the TAL1-regulated oncogenic program. One of the critical downstream targets in this circuitry is the TRIB2 gene, which is oppositely regulated by TAL1 and E2A/HEB and is essential for the survival of T-ALL cells.
DOI: 10.1038/nm.2610
发表时间: 2012-02-26
期刊: Nature medicine
影响因子: 82.9
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