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Blood:在成人T细胞白血病/淋巴瘤中,IRF4和NF-κB形成一个前馈回路调控基因表达

2020-02-03 QQY MedSci原创

中心点:在ATL细胞,IRF4和NF-κB形成一个前馈回路,协同调控基因的表达。IRF4和NF-κB结合在超级增强子丰富区域,调控重要致癌基因表达,包括MYC、CCR4和BIRC3。摘要:成人T细胞白血病/淋巴瘤(ATL)是一种来源于成熟CD4+T淋巴细胞的高侵袭性的恶性血液病。近期,研究人员发现,ATL细胞转录调控网络由两个致癌转录因子(IRF4和NF-κB)驱动。原发性ATL样本的基因表达谱显

中心点:

在ATL细胞,IRF4和NF-κB形成一个前馈回路,协同调控基因的表达。

IRF4和NF-κB结合在超级增强子丰富区域,调控重要致癌基因表达,包括MYC、CCR4和BIRC3。

摘要:

成人T细胞白血病/淋巴瘤(ATL)是一种来源于成熟CD4+T淋巴细胞的高侵袭性的恶性血液病。近期,研究人员发现,ATL细胞转录调控网络由两个致癌转录因子(IRF4和NF-κB)驱动。

原发性ATL样本的基因表达谱显示,IRF4基因在ATL细胞中的表达高于正常T细胞。染色质免疫沉淀测序分析显示,IRF4结合区域在超级增强子中比在典型增强子中更常见。

NF-κB也结合在IRF4-结合的调控元素上,形成一个连贯的前馈回路,协同调节基因参与T细胞的功能和发展。此外,在ATL细胞中,IRF4和NF-κB还调控几个与ATL超级增强子相关的癌基因,包括MYC、CCR4和BIRC3。

遗传抑制BIRC3可诱导ATL细胞生长抑制,提示其可能是IRF4-NF-κB转录网络的一个重要的下游效应分子。

原始出处:

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    2020-09-03 anan
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