Oncotarget:胶质母细胞瘤新联合疗法

2015-05-11 佚名 生物谷

在人类的癌症治疗方法中,特异性地靶向突变疗法引得了大肆赞扬,然而肿瘤细胞常常会对此上有政策,下有对策。为了研究清楚这个问题,来自加州大学圣迭戈医学院和Moores癌症中心的研究人员们发现了一种很有前景的联合疗法,来治疗最常见的大脑原发肿瘤-胶质母细胞瘤。这项发表在5月5号Oncotarget杂志上的研究发现,小鼠胶质母细胞瘤模型和病人来源的胶质母细胞组织(之后在实验室培养),均可以被三联抗癌药物有

在人类的癌症治疗方法中,特异性地靶向突变疗法引得了大肆赞扬,然而肿瘤细胞常常会对此上有政策,下有对策。为了研究清楚这个问题,来自加州大学圣迭戈医学院和Moores癌症中心的研究人员们发现了一种很有前景的联合疗法,来治疗最常见的大脑原发肿瘤-胶质母细胞瘤。

这项发表在5月5号Oncotarget杂志上的研究发现,小鼠胶质母细胞瘤模型和病人来源的胶质母细胞组织(之后在实验室培养),均可以被三联抗癌药物有效治疗。这三种药分别为:一个是靶向上皮生长因子受体(EGFR)基因突变,一个是提高了癌症细胞的应激反应,另一个是损伤了肿瘤细胞的DNA。

"研究胶质母细胞瘤的治疗方法就像是下棋游戏。医师每一步治疗或行动之后,肿瘤会有一个反招来对抗,"加州大学圣迭戈分校,神经外科学副教授,研究和学术发展副主席,此项研究的资深作者ClarkChen博士说。

高达50%的胶质母细胞瘤有EGFR突变,从而使癌症细胞对环境因素进行的生长调节不敏感,最终使它们的生长失控。然而,高特异性的EGFR抑制剂对EGFR突变的胶质母细胞瘤并不特别有效。

"当我们用EGFR抑制剂治疗胶质母细胞瘤细胞的时候,它们会开启另一个受体,从而绕过了对EGFR的需要,"Chen说。"任何有效的治疗方法,是需要一个战略性的举措,来设计一个可以将死的联合。"

为了发展这样的一个战略,Chen和他的团队转向了PLK1,这个蛋白是调节胶质母细胞瘤的应激水平的,对这些细胞的存活十分重要。Chen和他的团队发现,对EGFR抑制剂抵抗的胶质母细胞瘤,仍然普遍地依赖于这个蛋白。

在小鼠的胶质母细胞瘤模型,和病人胶质母细胞瘤中,单独使用EGFR抑制剂,PLK1抑制剂或者是目前的标准治疗药物(DNA损伤剂),都只能暂时地阻止肿瘤细胞的生长。但是,就像人类疾病一样,肿瘤终究又长回来了。然而,当将这三种药物联合使用,并没有发现肿瘤的复发。经过治疗的小鼠,经受住了这种联合治疗方案,且没有明显的副作用。

"人们常常认为,如果我们找到了引起癌症的突变,并且抑制这个突变的功能,我们就可以治愈癌症,"加州大学圣迭戈分校,神经外科主任,此项研究的共同作者BobS.Carter博士说。"我们的研究表明,现实情况要复杂得多。我们的结果为如何利用生物的基本概念,来应对这项具有挑战性的复杂性,提供了蓝图。

在这项研究中,用于小鼠模型的三种药物是:BI2536,PLK1抑制剂;Gefitnib,EGFR抑制剂和TMZ,胶质母细胞瘤的标准化疗药物。此项研究的作者指出,尽管三种药物联合治疗病人的安全性和副作用还不清楚,但在所有个体均有良好的耐受性。目前Gefitinib和TMZ治疗胶质母细胞瘤病人的临床安全性档案已经建立完善,PLK1抑制剂在目前的临床试验中有良好的耐受性(一个用于急性髓性白血病的药物已经进入了临床试验3期)。

原始出处:

New combination treatment strategy to 'checkmate' glioblastoma.MedicalXpress, May 8, 2015.

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