Targeting of apoptosis gene loci by reprogramming factors leads to selective eradication of leukemia cells

Targeting of apoptosis gene loci by reprogramming factors leads to selective eradication of leukemia cells
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通过重编程因子靶向凋亡基因位点导致选择性根除白血病细胞

DOI:
10.1038/s41467-019-13411-y
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发表时间:
2019-12
影响因子:
16.6
通讯作者:
Cheng Tao
Cheng Tao
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wang Yajie;Lu Ting;Sun Guohuan;Zheng Yawei;Yang Shangda;Zhang Hongyan;Hao Sha;Liu Yanfeng;Ma Shihui;Zhang Houyu;Ru Yongxin;Gao Shaorong;Yen Kuangyu;Cheng Hui;Cheng Tao

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将体细胞重编程策略应用于肿瘤细胞生物学是分析肿瘤发生机制和开发新的治疗方法的有力途径。在这里,我们测试是否可以使用经典的重编程转录因子-Oct4,Sox2,Klf4和c-Myc(称为OSKM)在体内对白血病细胞进行重编程。出乎意料的是,我们发现OSKM可以根除白血病细胞,并显著提高携带白血病的小鼠的存活率。相比之下,OSKM对正常造血细胞的影响最小。利用ATAC-SEQ,我们发现OSKM诱导白血病细胞中编码凋亡调节因子的基因附近的染色质可及性。此外,这种选择性效应还包括作为早期事件的H3K9me3的下调。对OSKM功能效应的分析表明,与C-MyandOct4相比,Klf4和Sox2在消除白血病细胞方面起主导作用。这些结果揭示了一种有趣的范式,通过该范式,OSKM启动的重编程诱导可以被利用和分流来开发新的抗癌策略。
Applying somatic cell reprogramming strategies in cancer cell biology is a powerful approach to analyze mechanisms of malignancy and develop new therapeutics. Here, we test whether leukemia cells can be reprogrammed in vivo using the canonical reprogramming transcription factors-Oct4,Sox2,Klf4, andc-Myc(termed as OSKM). Unexpectedly, we discover that OSKM can eradicate leukemia cells and dramatically improve survival of leukemia-bearing mice. By contrast, OSKM minimally impact normal hematopoietic cells. Using ATAC-seq, we find OSKM induce chromatin accessibility near genes encoding apoptotic regulators in leukemia cells. Moreover, this selective effect also involves downregulation of H3K9me3 as an early event. Dissection of the functional effects of OSKM shows thatKlf4andSox2play dominant roles compared toc-MycandOct4in elimination of leukemia cells. These results reveal an intriguing paradigm by which OSKM-initiated reprogramming induction can be leveraged and diverged to develop novel anti-cancer strategies.
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