Leukemia:意大利科学家筛选出精准治疗白血病的潜在新药

2017-03-28 生物谷 生物谷

近日,来自意大利的科学家在自然旗下期刊Leukemia上发表了一项最新研究进展,他们发现一种组蛋白去乙酰化酶抑制剂能够选择性杀伤发生某个基因重排的B前体细胞急性淋巴细胞白血病(BCP-ALL),该研究为这种难治白血病亚型的治疗提供了新的潜在药物。携带CRLF2和JAK2基因变异的白血病细胞存在JAK/STAT信号途径的异常,并且病人往往预后


近日,来自意大利的科学家在自然旗下期刊Leukemia上发表了一项最新研究进展,他们发现一种组蛋白去乙酰化酶抑制剂能够选择性杀伤发生某个基因重排的B前体细胞急性淋巴细胞白血病(BCP-ALL),该研究为这种难治白血病亚型的治疗提供了新的潜在药物。

携带CRLF2和JAK2基因变异的白血病细胞存在JAK/STAT信号途径的异常,并且病人往往预后情况不好。HDAC抑制剂givinostat/ITF2357能够通过抑制JAK/STAT途径在全身型幼年特发性关节炎和骨髓增殖性肿瘤的治疗方面发挥作用。这些发现让研究人员意识到givinostat这种药物可能对发生CRLF2重排的BCP-ALL也有作用,目前这种白血病还没有有效的治疗方法。

在这项研究中,研究人员发现givinostat能够抑制发生CRLF2重排的BCP-ALL细胞系的增殖,并诱导细胞凋亡。与之类似,givinostat还可以杀死发生CRLF2重排的病人体内的白血病细胞,但是对正常的造血细胞没有影响。研究人员还发现在低剂量情况下,givinostat能够下调JAK/STAT信号途径中的基因表达,抑制STAT5的磷酸化。

研究人员在在体内实验中观察到givinostat能够显著抑制人源化肿瘤异种移植模型体内肿瘤的生长。重要的是,givinostat能够杀死抵抗ruxolitinib的细胞,增强目前所使用的化疗药物的作用效果。因此givinostat与传统化疗药物联合或代表了治疗这种难治白血病亚型的一种有效方法。最后,givinostat对癌细胞的选择性杀伤作用能够有助于降低药物强度,降低毒性和相关并发症。

综上所述,该研究发现givinostat这种HDAC抑制剂对发生CRLF2基因重排的BCP-ALL有选择性杀伤作用,为该疾病治疗找到一种潜在药物。

原始出处:

Savino AM, et al.The histone deacetylase inhibitor givinostat (ITF2357) exhibits potent anti-tumor activity against CRLF2-rearranged BCP-ALL. Leukemia. 2017 Mar 23. doi: 10.1038/leu.2017.93.

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    2017-03-29 tofsw

    期待药物的疗效

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识别癌症样本与正常对照组之间的,差异表达的小分子核糖核酸(DE miRNAs),是一种常见的研究致癌机制的方法。然而,在群体中进行DE miRNAs的检测时,我们并不知道其是否会在一个特定的癌症样本中进行差异性表达。该研究发现,在特定类型的正常组织中,成对的miRNA的相对表达序具有高度的稳定性,但在对应的癌症组织中表现出十分的紊乱。该研究者提出一个方法,称为RankMiRNA