Blood:Jak2V617F协同Dnmt3a缺失通过激活增强子驱动的炎症信号诱导骨髓纤维化

2018-10-27 MedSci MedSci原创

中心点:造血干细胞丢失Dbnt3a协同Jak2V617F可诱导致死性的骨髓纤维化。Dnmt3a缺失导致增强子激活,驱动异常的自我更新和炎症信号。摘要:骨髓增生性肿瘤(MPN)是在造血干细胞和祖细胞(HSPC)发生遗传病变后发生的一组血液癌症。Sebastien Jacquelin等人发现Jak2V617F表达和Dnmt3a缺失之间的突变协同作用可驱动早期真性红细胞增多症进展至晚期骨髓纤维化。通过C

中心点:

造血干细胞丢失Dbnt3a协同Jak2V617F可诱导致死性的骨髓纤维化。

Dnmt3a缺失导致增强子激活,驱动异常的自我更新和炎症信号。

摘要:

骨髓增生性肿瘤(MPN)是在造血干细胞和祖细胞(HSPC)发生遗传病变后发生的一组血液癌症。Sebastien Jacquelin等人发现Jak2V617F表达和Dnmt3a缺失之间的突变协同作用可驱动早期真性红细胞增多症进展至晚期骨髓纤维化。

通过CRISPR-Case9破坏JK2V617F型HSPCs的Dnmt3a,研究人员发现Dnmt3a缺失可阻碍红细胞元素的积累,导致骨髓和脾脏纤维化浸润。

通过整合转录分析和人类数据库集,研究人员确定了一个核心的DNMT3A驱动的基因表达程序,该程序在Dnmt3a缺失的多种模型和背景中共享。在Dnmt3a-/- Jak2V617F HSPC中,可见异常的自我更新和炎症信号,该信号是通过增加增强子元件处的染色质亲和性来驱动的。

本研究明确了Jak2V617F驱动的MPN和Dnmt3a缺失之间具有协同致癌性——激活HSPC增强子所驱动的炎症信号。


原始出处:

Sebastien Jacquelin,et al. Jak2V617F and Dnmt3a loss cooperate to induce myelofibrosis through activated enhancer-driven inflammation.Blood  2018  :blood-2018-04-846220;  doi: https://doi.org/10.1182/blood-2018-04-846220

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    2018-11-01 tulenzi
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    2018-10-28 120d6a47m86暂无昵称

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    2018-10-28 120d6a47m86暂无昵称

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