Therapeutic targeting of c-Myc in T-cell acute lymphoblastic leukemia, T-ALL.

Therapeutic targeting of c-Myc in T-cell acute lymphoblastic leukemia, T-ALL.
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DOI:
10.18632/oncotarget.1873
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发表时间:
2014-05-30
期刊:
影响因子:
--
通讯作者:
Payet-Bornet D
Payet-Bornet D
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其他
文献类型:
--
作者:
Loosveld M;Castellano R;Gon S;Goubard A;Crouzet T;Pouyet L;Prebet T;Vey N;Nadel B;Collette Y;Payet-Bornet D

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接受强化化疗的T-ALL患者缓解率高。然而,频繁的长期毒性和复发为化疗难治性肿瘤构成了主要的临床挑战,可以通过靶向治疗来满足。c-MYC是T-ALL中的中心癌基因,促使探索MYC抑制剂如JQ 1(BET-溴结构域抑制剂)和SAHA(HDAC抑制剂)的疗效。使用标准化的离体药物筛选试验,我们在这里表明,JQ 1和SAHA显示出与蛋白酶体,PI 3 K/AKT/mTOR和NOTCH通路抑制剂相比的竞争效率,并与阿曲斯汀组合协同作用。我们还首次比较了这种关联在异种移植人原发性T-ALL小鼠中的体内相关性。我们的数据表明,尽管JQ 1或SAHA与化疗方案相结合的治疗可能代表了T-ALL的有希望的发展,但组合需要针对特定的应答患者亚组进行调整,其特征仍有待精确定义。
T-ALL patients treated with intensive chemotherapy achieve high rates of remission. However, frequent long-term toxicities and relapses into chemotherapy-refractory tumors constitute major clinical challenges which could be met by targeted therapies. c-MYC is a central oncogene in T-ALL, prompting the exploration of the efficacy of MYC inhibitors such as JQ1 (BET-bromodomain inhibitor), and SAHA (HDAC inhibitor). Using a standardized ex vivo drug screening assay, we show here that JQ1 and SAHA show competitive efficiency compared to inhibitors of proteasome, PI3K/AKT/mTOR and NOTCH pathways, and synergize in combination with Vincristine. We also compared for the first time the in vivo relevance of such associations in mice xenografted with human primary T-ALLs. Our data indicate that although treatments combining JQ1 or SAHA with chemotherapeutic regimens might represent promising developments in T-ALL, combinations will need to be tailored to specific subgroups of responsive patients, the profiles of which still remain to be precisely defined.
选择性抑制BET溴结构域。
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