Mutant U2AF1 Expression Alters Hematopoiesis and Pre-mRNA Splicing In Vivo.

Mutant U2AF1 Expression Alters Hematopoiesis and Pre-mRNA Splicing In Vivo.
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突变的U2AF1表达在体内改变造血和mRNA剪接。

DOI:
10.1016/j.ccell.2015.04.008
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发表时间:
2015-05-11
期刊:
影响因子:
50.3
通讯作者:
Walter MJ
Walter MJ
中科院分区:
医学1区
文献类型:
--
作者:
Shirai CL;Ley JN;White BS;Kim S;Tibbitts J;Shao J;Ndonwi M;Wadugu B;Duncavage EJ;Okeyo-Owuor T;Liu T;Griffith M;McGrath S;Magrini V;Fulton RS;Fronick C;O'Laughlin M;Graubert TA;Walter MJ

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剪接体基因U2 AF 1的杂合子体细胞突变发生在约11%的骨髓增生异常综合征(MDS)患者中,MDS是最常见的成人髓系恶性肿瘤。目前还不清楚这些突变如何导致疾病。我们使用强力霉素诱导的转基因小鼠模型研究了最常见的U2 AF 1突变的体内造血后果。通过全转录组分析(RNA-seq),表达突变体U2 AF 1(S34 F)的小鼠显示改变的造血和造血祖细胞中前mRNA剪接的变化。与人类RNA-seq数据集的整合确定了常见的突变U2 AF 1诱导的剪接改变富含RNA加工基因、核糖体基因和复发突变的MDS和急性髓性白血病相关基因。这些发现支持突变U2 AF 1改变下游基因亚型表达,从而导致MDS患者异常造血的假设。
Heterozygous somatic mutations in the spliceosome gene U2AF1 occur in ~11% of patients with myelodysplastic syndromes (MDS), the most common adult myeloid malignancy. It is unclear how these mutations contribute to disease. We examined in vivo hematopoietic consequences of the most common U2AF1 mutation using a doxycycline-inducible transgenic mouse model. Mice expressing mutant U2AF1(S34F) display altered hematopoiesis and changes in pre-mRNA splicing in hematopoietic progenitor cells by whole transcriptome analysis (RNA-seq). Integration with human RNA-seq datasets determined that common mutant U2AF1-induced splicing alterations are enriched in RNA processing genes, ribosomal genes, and recurrently-mutated MDS and acute myeloid leukemia-associated genes. These findings support the hypothesis that mutant U2AF1 alters downstream gene isoform expression, thereby contributing to abnormal hematopoiesis in MDS patients.
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