Reverse engineering of TLX oncogenic transcriptional networks identifies RUNX1 as tumor suppressor in T-ALL.

Reverse engineering of TLX oncogenic transcriptional networks identifies RUNX1 as tumor suppressor in T-ALL.
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DOI:
10.1038/nm.2610
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发表时间:
2012-02-26
期刊:
影响因子:
82.9
通讯作者:
--
中科院分区:
医学1区
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TLX 1和TLX 3转录因子癌基因在T细胞急性淋巴细胞白血病(T-ALL)的发病机制中起重要作用。在这里,我们使用全球转录网络的反向工程来破译由TLX 1和TLX 3控制的致癌调控回路。该系统生物学分析将TLX 1和TLX 3定义为控制T-ALL的致癌转录回路的主调节因子。值得注意的是,该分层网络的网络结构分析鉴定了RUNX 1作为TLX 1和TLX 3诱导的T-ALL的重要介质,并预测了RUNX 1在T细胞转化中的肿瘤抑制作用。与这些结果一致,我们在人T-ALL中鉴定了RUNX 1的复发性体细胞功能丧失突变。总体而言,这些结果将TLX 1和TLX 3置于控制白血病发展的致癌转录网络之上,证明了网络分析在识别控制人类癌症的调控回路中的关键元件以及将RUNX 1识别为T-ALL中的肿瘤抑制基因的能力。
The TLX1 and TLX3 transcription factor oncogenes play an important role in the pathogenesis of T-cell acute lymphoblastic leukemia (T-ALL). Here we used reverse engineering of global transcriptional networks to decipher the oncogenic regulatory circuit controlled by TLX1 and TLX3. This Systems Biology analysis defined TLX1 and TLX3 as master regulators of an oncogenic transcriptional circuit governing T-ALL. Notably, network structure analysis of this hierarchical network identified RUNX1 as an important mediator of TLX1 and TLX3 induced T-ALL, and predicted a tumor suppressor role for RUNX1 in T-cell transformation. Consistent with these results, we identified recurrent somatic loss of function mutations in RUNX1 in human T-ALL. Overall, these results place TLX1 and TLX3 atop of an oncogenic transcriptional network controlling leukemia development, demonstrate power of network analysis to identify key elements in the regulatory circuits governing human cancer and identify RUNX1 as a tumor suppressor gene in T-ALL.
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