Inhibition of RNA polymerase I as a therapeutic strategy to promote cancer-specific activation of p53.

Inhibition of RNA polymerase I as a therapeutic strategy to promote cancer-specific activation of p53.
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抑制RNA聚合酶I作为促进p53癌症特异性激活的治疗策略。

DOI:
10.1016/j.ccr.2012.05.019
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发表时间:
2012-07-10
期刊:
影响因子:
50.3
通讯作者:
Hannan RD
Hannan RD
中科院分区:
医学1区
文献类型:
--
作者:
Bywater MJ;Poortinga G;Sanij E;Hein N;Peck A;Cullinane C;Wall M;Cluse L;Drygin D;Anderes K;Huser N;Proffitt C;Bliesath J;Haddach M;Schwaebe MK;Ryckman DM;Rice WG;Schmitt C;Lowe SW;Johnstone RW;Pearson RB;McArthur GA;Hannan RD

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核糖体RNA基因(rDNA)通过RNA聚合酶I的转录增加是人类癌症的共同特征,但它是否是恶性表型所必需的尚不清楚。我们表明,rDNA转录可以治疗靶向与小分子CX-5461选择性杀死B淋巴瘤细胞在体内,同时保持一个可行的野生型B细胞群体。治疗效果是核仁破坏和激活p53依赖性凋亡信号传导的结果。人白血病和淋巴瘤细胞系也显示出对依赖于p53突变状态的rDNA转录抑制的高敏感性。这些结果确定了选择性抑制rDNA转录作为癌症特异性激活p53和治疗血液恶性肿瘤的治疗策略。
Increased transcription of ribosomal RNA genes (rDNA) by RNA Polymerase I is a common feature of human cancer, but whether it is required for the malignant phenotype remains unclear. We show that rDNA transcription can be therapeutically targeted with the small molecule CX-5461 to selectively kill B-lymphoma cells in vivo while maintaining a viable wild-type B cell population. The therapeutic effect is a consequence of nucleolar disruption and activation of p53-dependent apoptotic signaling. Human leukemia and lymphoma cell lines also show high sensitivity to inhibition of rDNA transcription that is dependent on p53 mutational status. These results identify selective inhibition of rDNA transcription as a therapeutic strategy for the cancer specific activation of p53 and treatment of hematologic malignancies.
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