Blood:HDAC11抑制剂,骨髓增生性肿瘤的新选择

2019-11-23 QQY MedSci原创

中心点:HDAC11是唯一的IV类HDAC,是骨髓增生性肿瘤的治疗点而非HDAC6。Hdac11在癌基因诱导的造血过程中起关键作用,但在正常造血过程中无相同作用。摘要:蛋白质乙酰化是癌症发生的重要因素。组蛋白去乙酰化酶6 (HDAC6)调控JAK2的翻译和蛋白质的稳定性,并与JAK2驱动的疾病有关,最典型的例子是骨髓增生性肿瘤(MPNs)。通过新型的高选择性HDAC抑制剂和基因缺陷小鼠模型,研究人

中心点:

HDAC11是唯一的IV类HDAC,是骨髓增生性肿瘤的治疗点而非HDAC6。

Hdac11在癌基因诱导的造血过程中起关键作用,但在正常造血过程中无相同作用。

摘要:

蛋白质乙酰化是癌症发生的重要因素。组蛋白去乙酰化酶6 (HDAC6)调控JAK2的翻译和蛋白质的稳定性,并与JAK2驱动的疾病有关,最典型的例子是骨髓增生性肿瘤(MPNs)。

通过新型的高选择性HDAC抑制剂和基因缺陷小鼠模型,研究人员发现是HDAC11对致癌性JAK2驱动的MPN细胞和患者样本的增殖和存活必不可少,而非HDAC6。值得注意的是,HDAC11在原始干细胞中有多种表达方式,主要由谱系决定。虽然Hdac11缺乏可以通过嵌合BM重组实现正常的造血干细胞和祖细胞分化,但在MPLW515L-MPN小鼠模型中,Hdac11缺乏症会显著减少异常的巨核细胞的数量、改善脾结构、减少纤维化、提高小鼠存活率。

因此,HDAC11抑制剂是治疗MPN患者的一种有吸引力的治疗方法。虽然JAK2抑制剂疗法对MPN患者有很大的临床益处,但为了逆转MPN病理和控制恶性造血,还是需要找到替代的治疗靶点。本研究强调了HDAC11作为一种独特的靶分子,具有MPN治疗潜能。

原始出处:

Lanzhu Yue, et al.HDAC11 Deficiency or Inhibition Disrupts Oncogene-Induced Stress Hematopoiesis in Myeloproliferative Neoplasms.Blood.2019895326.https://doi.org/10.1182/blood.2019895326

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    2020-03-17 lingaifan
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    2020-05-06 jklm09
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中心点:Sos1介导致瘤性Kras诱导的野生型Nras和Hras超活化。Sos1-/-可减弱Kras[G12D]诱导型MPN,延长Kras[G12D]小鼠的存活期。摘要:研究人员既往发现Kras[G12D]在血液恶性肿瘤中的致癌性比Nras的更强。Xiaona You等研究人员认为Kras[G12D]具有很强的白细胞生成活性,至少部分原因是在于其独特的超激活野生型(WT)Nras和Hras的能力。