Blood:DYRK2,CML的新潜在治疗靶点!

2019-09-16 MedSci MedSci原创

近期,Chun Shik Park等人发现KLF4可通过抑制具有白血病启动能力的白血病干细胞/祖细胞的抑制机制,促进慢性髓系白血病(CML)样骨髓增生性肿瘤小鼠模型的疾病进展。敲除klf4基因可通过损害BCR-ABL1+CD150+LSK白血病细胞的存活和自我更新,从而严重破坏BCR-ABL1(p210)诱导的CML的维持。

中心点:

KLF4缺失通过去抑制DYRK2基因的表达损害CML白血病干细胞/祖细胞的自我更新和存活。

DYRK2蛋白的稳定通过耗竭c-Myc和激活p53抑制白血病干细胞/祖细胞的存活和自我更新。

摘要:

白血病干细胞是一种罕见的细胞类型,具有原始的祖细胞表型,可以启动、维持和重现白血病,但目前我们对其自我更新的机制知之甚少。

近期,Chun Shik Park等人发现KLF4可通过抑制具有白血病启动能力的白血病干细胞/祖细胞的抑制机制,促进慢性髓系白血病(CML)样骨髓增生性肿瘤小鼠模型的疾病进展。敲除klf4基因可通过损害BCR-ABL1+CD150+LSK白血病细胞的存活和自我更新,从而严重破坏BCR-ABL1(p210)诱导的CML的维持。

在机制尚,KLF4可制白血病干细胞/祖细胞的Dyrk2基因,因而,KLF4缺失会导致DYRK2激酶的水平升高,DYRK2激酶的水平与通过耗竭c-Myc和激活p53所抑制白血病干细胞/祖细胞的存活和自我更新相关。除了转录调控外,DYRK2蛋白稳定通过抑制泛素E3连接酶SIAH2和维生素K3来促进小鼠和人类CML干细胞/祖细胞的凋亡和自我更新。

总而言之,本研究表明DYRK2是调控p53和c-Myc介导的CML细胞存活和自我更新的分子检查点,有望成为治疗CML的分子靶点。

原始出处:

Chun Shik Park, et al.KLF4 Represses DYRK2 Inhibition of Self-renewal and Survival Through c-Myc and p53 in Leukemia Stem/Progenitor Cells.Blood 2019 :blood.2018875922; doi: https://doi.org/10.1182/blood.2018875922

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    2019-09-18 wangbingxhy
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    2019-09-17 一天没事干

    很好的学习机会

    0

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