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科学家破解黑色素瘤治疗新药作用机制 已进入临床试验阶段

2016-09-12 佚名 生物谷

来自美国弗吉尼亚大学医学院的一项研究表明,一种实验性癌症治疗药物已经表现出治疗黑色素瘤的巨大前景,可能对其他癌症也有作用。该研究还发现这种药物可能对已经对其他治疗产生抵抗的黑色素瘤也比较有效。这种叫做pevonedistat的药物已经开始进入临床试验。但是由于这种药物能够关闭许多不同蛋白的表达,因此一直以来科学家们都不清楚该药物杀伤癌细胞的确切机制。在这项研究中研究人员证明这种药物可以对一种特殊蛋


来自美国弗吉尼亚大学医学院的一项研究表明,一种实验性癌症治疗药物已经表现出治疗黑色素瘤的巨大前景,可能对其他癌症也有作用。该研究还发现这种药物可能对已经对其他治疗产生抵抗的黑色素瘤也比较有效。

这种叫做pevonedistat的药物已经开始进入临床试验。但是由于这种药物能够关闭许多不同蛋白的表达,因此一直以来科学家们都不清楚该药物杀伤癌细胞的确切机制。在这项研究中研究人员证明这种药物可以对一种特殊蛋白产生作用,黑色素瘤细胞和其他癌症细胞都依赖这种蛋白进行快速复制。

对抗黑色素瘤

pevonedistat阻断的这种重要蛋白是CDT2基因的表达产物,该蛋白对恶性癌细胞的生存非常重要,缺少这种蛋白细胞就会停止复制并开始凋亡。“我们已经深入了解了这种药物发挥作用的机制。”研究人员表示。“我们认为这种药物并没有作用在原靶点上,而是作用在原靶点的下游(CDT2)。”

研究发现黑色素瘤细胞中存在CDT2的过表达情况,而高表达这种蛋白的病人生存的几率很小。“不止是黑色素瘤,其他肿瘤也依赖这个基因,这就导致这些肿瘤非常容易受到这种药物的影响。事实上,我们发现黑色素瘤细胞中CDT2表达越高,就越容易受到该药物的影响。”

这种药物的安全性和有效性目前还在试验阶段,因此还不能作为临床治疗用药。但是研究人员基于他们的研究对临床试验持乐观态度。“我们认为这种药物将对黑色素瘤病人产生显著影响。事实上,这个药物对所有黑色素瘤都非常有效,甚至包括那些至今仍然没有有效治疗方法的类型。除此之外,该药物还对那些已经对其他药物产生抵抗的黑色素瘤也有作用。如果得到FDA批准对该药物进行进一步开发,对于那些最初治疗失败的病人来说,这种药物有望成为很好的二线治疗用药。”

原始出处

Mouadh Benamara, Fadila Guessousa, Kangping Dua, Patrick Corbetta, Joseph Obeidb, Daniel Gioelic,Craig L. Slingluff Jrb, Tarek Abbasa.Inactivation of the CRL4-CDT2-SET8/p21 ubiquitylation and degradation axis underlies the therapeutic efficacy of pevonedistat in melanoma.EbioMedicine.2016

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    2016-11-11 sunylz
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    2016-09-14 1dd8a7c5m95(暂无匿称)

    学习了,赞一个!!!

    0

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    2016-09-14 1dd8a7c5m95(暂无匿称)

    学习了,赞一个!!!

    0

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    2016-09-13 doctorJiangchao

    继续学习

    0

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    2016-09-13 doctorJiangchao

    继续关注

    0

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