PNAS:硫唑嘌呤联合视黄酸治疗侵袭性神经母细胞瘤

2017-08-10 佚名 来宝网

一个物质的组合可以影响肿瘤DNA的化学修饰,并使肿瘤分化为无害的神经细胞,可以代表一种治疗侵袭性神经母细胞瘤的新方法。用小鼠进行的研究表明,联合治疗能显着抑制肿瘤的生长,这种新方法已被卡罗林斯卡学院的研究人员提出,该研究发表在美国国家科学院院刊,也质疑研究领域中的一个它可能导致神经母细胞瘤儿童的潜在有害错误治疗的假说。

一个物质的组合可以影响肿瘤DNA的化学修饰,并使肿瘤分化为无害的神经细胞,可以代表一种治疗侵袭性神经母细胞瘤的新方法。用小鼠进行的研究表明,联合治疗能显着抑制肿瘤的生长,这种新方法已被卡罗林斯卡学院的研究人员提出,该研究发表在美国国家科学院院刊,也质疑研究领域中的一个它可能导致神经母细胞瘤儿童的潜在有害错误治疗的假说。

神经母细胞瘤是一种影响儿童周围神经系统的肿瘤疾病,且有不同的侧面。这些肿瘤中的很多会自然消失,其他一些则对治疗反应良好。然而,有些类型的神经母细胞瘤具有侵袭性,且在许多情况下,对治疗没有反应。这些高危患者的死亡率很高,因此需要对新的和有效的实质性治疗方法。

肿瘤生长的显着抑制

在研究期间,研究人员用硫唑嘌呤(AZA)治疗小鼠,硫唑嘌呤能从癌细胞的DNA中阻断和清除甲基,旨在激活与神经母细胞瘤发生拮抗的基因。硫唑嘌呤联合视黄酸治疗。视黄酸能够使某些肿瘤细胞分化、成熟、变成无害的神经细胞。

硫唑嘌呤和视黄酸(RA)单独使用都不能抑制高危肿瘤的生长,但联合治疗显着抑制小鼠肿瘤的生长。

治疗还诱导的一种名为HIF2α的因子的表达,所以研究人员还测试了与HIF2α抑制剂的联合治疗。这种抑制剂已被提议作为神经母细胞瘤的一种替代治疗,因为HIF2α蛋白被认为能够耦合更具有侵袭性的神经母细胞瘤。目前正在进行HIF2α抑制剂是对其他肿瘤疾病治疗的临床试验。
“有趣的是,AZA和RA联合治疗效果被HIF2α抑制剂拮抗。”另外,大量的病人数据的分析表明,HIF2α蛋白不耦合侵袭性神经母细胞瘤,但是和降低风险及改善患者的生存相关。

与HIF2α相关的潜在有害的错误治疗

在应用于治疗神经母细胞瘤患者之前,HIF2α抑制剂的作用还需要进一步的研究。
除了展示一个新的潜在的治疗,我们研究的一个假设还发现了儿童神经母细胞瘤潜在有害的错误治疗。因此,这个研究对于今后的临床应用非常重要.

原始出处:
Westerlund I, Shi Y, Toskas K, et al.Combined epigenetic and differentiation-based treatment inhibits neuroblastoma tumor growth and links HIF2α to tumor suppression.Proc Natl Acad Sci U S A. 2017 Jul 25;114(30):E6137-E6146. doi: 10.1073/pnas.1700655114. Epub 2017 Jul 10.

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    2018-01-27 drwjr
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    2017-08-12 sunyl07
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    2017-08-11 明天会更好!

    谢谢分享,学习了很好!

    0

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    2017-08-10 184****9840

    学习了谢谢分享

    0

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