NATURE:WRN解旋酶是微卫星不稳定癌症的合成致死靶标

2019-04-12 海北 MedSci原创

合成致死率是两个遗传事件之间的相互作用,通过这两个遗传事件共同发生导致细胞死亡,但每个事件本身都没有导致细胞死亡的能力。其可以用于癌症治疗。

合成致死率是两个遗传事件之间的相互作用,通过这两个遗传事件共同发生导致细胞死亡,但每个事件本身都没有导致细胞死亡的能力。其可以用于癌症治疗。

DNA修复过程代表了有吸引力的合成致死靶标,因为许多癌症表现出DNA修复途径的损伤,这可能导致对特定修复蛋白的依赖。

聚(ADP-核糖)聚合酶1(PARP-1)抑制剂在治疗同源重组缺陷的癌症中的成功突出了这种方法的潜力。

假设其他DNA修复缺陷会产生合成致死关系,研究人员通过微卫星不稳定性(MSI)查询癌症中的依赖性,这是由于DNA错配修复不足造成的。

研究人员使用CRISPR-Cas9介导的敲除和RNA干扰,分析了来自大规模沉默筛选的数据,并发现RecQ DNA解旋酶WRN在体外和体内MSI模型中是选择性必需的,但在微卫星稳定癌症模型中是可有可无的。

在MSI模型中,WRN的消耗诱导双链DNA断裂,并促进细胞凋亡和细胞周期停滞。 MSI癌症模型需要WRN的解旋酶活性,但不需要其外切核酸酶活性。

这些研究结果表明,WRN是一种合成致死的脆弱性,是MSI癌症的有希望的药物靶标。


原始出处:

Chan EM et al. WRN helicase is a synthetic lethal target in microsatellite unstable cancers. NATURE, 2019; doi: 10.1038/s41586-019-1102-x.


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    2020-03-05 liye789132251
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    2020-02-17 qjddjq
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    2019-04-14 zhaojie88
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    2019-04-12 1ddf0692m34(暂无匿称)

    学习了,谢谢分享

    0