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Blood:PHF19通过增强PRC2来促进MM的发生发展

2019-08-06 MedSci MedSci原创

近期,研究人员发现PRC2相关因子,PHD手指蛋白19(PHF19)是多发性骨髓瘤(MM)肿瘤发生过程中的重要介质。现已发现PHF19过表达或遗传扩增与MM和浆细胞白血病患者的恶性进展相关。采用多种MM模型,研究人员证实PHF19对肿瘤细胞在体内外的生长都至关重要,

中心点:

无论是在体内还是体外,多发性骨髓瘤(MM)的生长均需要PHF19的参与,在临床上,PHF19与MM患者的预后不良呈正相关

PHF19通过相关的PRC2增强MM细胞的致瘤性,使MM细胞对PRC2抑制剂具有敏感性

摘要:

多梳抑制复合物2 (PRC2)失调可在一定程度上通过催化组蛋白H3赖氨酸27 (H3K27me3)三甲基化促进血液恶性肿瘤的发展。但PRC2的活性在多种血癌中失调的机制基本尚未明确。

近期,研究人员发现PRC2相关因子,PHD手指蛋白19(PHF19)是多发性骨髓瘤(MM)肿瘤发生过程中的重要介质。现已发现PHF19过表达或遗传扩增与MM和浆细胞白血病患者的恶性进展相关。采用多种MM模型,研究人员证实PHF19对肿瘤细胞在体内外的生长都至关重要,

在机制上,PHF19介导的致癌作用依赖其与PRC2的生理互作以及PHF19的染色质结合功能。ChiP测序和RNA测序显示,在MM细胞中,PHF19对维持H2K27me3图谱和PRC2靶点(包括对MM肿瘤发生至关重要的细胞周期抑制因子和JAK-STAT信号基因)的适度表达均具有重要作用。对MM患者样本的转录本数据库进行关联研究进一步支持PHF19调节的信号通路的临床关联。

最后,研究人员发现MM细胞普遍对PRC2抑制剂敏感。总而言之,本研究表明PHF19通过增强PRC2的基因调控功能来促进MM的肿瘤发生过程,提示阻滞PRC2或可用于治疗MM。


原始出处:

Zhihong Ren,et al.PHF19 promotes multiple myeloma tumorigenicity through PRC2 activation.Blood 2019 :blood.2019000578; doi: https://doi.org/10.1182/blood.2019000578

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    2020-05-01 zhishijing
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    2020-07-21 hjwang79
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