BLOOD :通过与蛋白质翻译抑制剂和bcl2共同治疗具有RUNX1突变的AML的有效治疗

2021-10-05 MedSci原创 MedSci原创

BRM是一种细胞内在因子,它限制了HPCs的胞内缬氨酸,从而调节HPCs的增殖、存活、功能和线粒体代谢

     RUNX1是一种参与正常和恶性造血功能的主调控转录因子。AML 中的大多数 RUNX1 突变是错义或缺失截断,表现为功能丧失突变。值得注意的是,突变体(mt)RUNX1可能会促进MDS和骨髓增生性肿瘤(MPN)中的白血病转化。在标准治疗后,表达 mtRUNX1 的 AML 患者比没有突变 RUNX1 的患者表现出较差的临床结果。

     有提出的研究表明,与缺乏 mtRUNX1 的 AML 细胞相比,它们携带 mtRUNX1 的同基因对应物显示出核糖体生物发生和分化受损,以及野生型 RUNX1、PU.1 和 c-Myc 的水平降低。与只有野生型 RUNX1 的 AML 细胞相比,表达 mtRUNX1 的 AML 细胞对蛋白质翻译抑制剂高三尖杉酯碱(奥西他星)和 BCL2 抑制剂 venetoclax 也更敏感。

     HHT 治疗抑制了增强子及其 BRD4 占据,并与 c-Myc、c-Myb、MCL1 和 Bcl-xL 水平降低有关与此一致,奥美他星和维奈托克或 BET 抑制剂的共同治疗在表达 mtRUNX1 的 AML 中诱导协同体外致死率。与单独使用每种药物相比,奥美他星和 venetoclax 或 BET 抑制剂的联合治疗也显示出提高的体内抗 AML 功效,这与移植了带有 mtRUNX1 的 AML 细胞的免疫耗竭小鼠的存活率提高有关。

     目前,AML预后亚型的ELN分类将具有mtRUNX1的AML指定为与不良预后相关的临时实体。这些发现强调了基于奥美他星的联合疗法对携带 mtRUNX1 的 AML 的优越疗效。因此,得到在这里讨论的临床前研究结果的支持,如果努力设计,未来基于om的静脉托和/或BET抑制剂联合临床试验进行并改善临床结果,那么可能有必要重新考虑mtRUNX1作为与不良前列腺相关的实体的AML单独命名。

 

原始出处:

Christopher P Mill, Warren Fiskus, Courtney D DiNardo, Christine Birdwell, John A Davis, Tapan Mahendra Kadia, Koichi Takahashi, Nicholas J Short, Naval G. Daver, Maro Ohanian, Gautam Borthakur, Steven M Kornblau, Michael R Green, Yuan Qi, Xiaoping Su, Joseph D. Khoury, Kapil N Bhalla; Effective therapy of AML with RUNX1 mutation by co-treatment with inhibitors of protein translation and BCL2. Blood 2021; blood.2021013156. doi: https://doi.org/10.1182/blood.2021013156

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    2022-03-05 jklm09
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    2021-10-07 Boyinsh
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    2021-10-07 soongzhihua
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