MPN patients harbor recurrent truncating mutations in transcription factor NF-E2.

MPN patients harbor recurrent truncating mutations in transcription factor NF-E2.
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DOI:
10.1084/jem.20120521
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发表时间:
2013-05-06
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Pahl HL
Pahl HL
中科院分区:
其他
文献类型:
--
作者:
Jutzi JS;Bogeska R;Nikoloski G;Schmid CA;Seeger TS;Stegelmann F;Schwemmers S;Gründer A;Peeken JC;Gothwal M;Wehrle J;Aumann K;Hamdi K;Dierks C;Kamar Wang W;Döhner K;Jansen JH;Pahl HL

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骨髓增生性肿瘤患者的转录因子 NF-E2 突变会产生截短的蛋白质,增强野生型 NF-E2 的功能,并在小鼠模型中引起红细胞增多和血小板增多。尽管最近通过发现 MPN 患者的几种不同突变而取得了进展,但骨髓增生性肿瘤 (MPN) 的分子病因学仍不完全清楚。我们最近描述了 MPN 患者中转录因子 NF-E2 的过度表达,并表明体内 NF-E2 水平升高会导致 MPN 表型并易于转基因小鼠发生白血病转化。我们报告 MPN 患者的 NF-E2 基因中存在获得性插入和缺失突变。这些导致截短的 NF-E2 蛋白增强野生型 (WT) NF-E2 功能并在小鼠模型中引起红细胞增多和血小板增多。 NF-E2 突变细胞获得了增殖优势,MPN 患者中相对于 WT NF-E2 细胞的克隆优势证明了这一点。我们的数据强调了 NF-E2 活性增加在 MPN 病理生理学中的作用。
Mutations in the transcription factor NF-E2 in patients with myeloproliferative neoplasms result in a truncated protein that enhances the function of wild-type NF-E2 and causes erythrocytosis and throbocytosis in a mouse model. The molecular etiology of myeloproliferative neoplasms (MPNs) remains incompletely understood, despite recent advances incurred through the discovery of several different mutations in MPN patients. We have recently described overexpression of the transcription factor NF-E2 in MPN patients and shown that elevated NF-E2 levels in vivo cause an MPN phenotype and predispose to leukemic transformation in transgenic mice. We report the presence of acquired insertion and deletion mutations in the NF-E2 gene in MPN patients. These result in truncated NF-E2 proteins that enhance wild-type (WT) NF-E2 function and cause erythrocytosis and thrombocytosis in a murine model. NF-E2 mutant cells acquire a proliferative advantage, witnessed by clonal dominance over WT NF-E2 cells in MPN patients. Our data underscore the role of increased NF-E2 activity in the pathophysiology of MPNs.
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