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Cell Rep:阻断癌细胞DNA修复真的很难吗?

2018-01-10 佚名 生物通

发表在《Cell Reports》的一篇文章证明,蛋白质RYBP可以使癌细胞对DNA损伤更敏感


发表在《Cell Reports》的一篇文章证明,蛋白质RYBP可以使癌细胞对DNA损伤更敏感。



艾伯塔大学(University of Alberta)的研究人员发现了一种让癌细胞乖乖屈服治疗的新机制。阻断RYBP蛋白,就能阻断癌细胞DNA修复!

“激活RYBP可以让癌细胞对DNA损伤更敏感,让化疗或放疗更有效果,”文章一作Mohammad Ali说。

RYBP蛋白是最有名的基因表达调控蛋白,属于表观遗传蛋白复合体PRC1家族成员。在以往的研究中,该团队的研究人员发现,PRC1复合体能帮助癌细胞修复DNA损伤。但是,这项研究结果令人惊奇地表明,PRC1家族里出了“叛徒”! 身为PRC1家族成员,RYBP却可以抑制DNA修复,更确切的说,是妨碍无错损伤修复进程。

Ali发现,RYBP表达水平高的乳腺癌细胞对化疗(PARP抑制剂)或放疗引起的DNA损伤特别敏感。

“治疗虽然对癌细胞造成了DNA损伤,但它们总能逃避损伤,成功自我修复,”Ali说。“我们的理想是把科研成果转化成临床实践,让病人获得更好的疗效。”
接下来,研究人员在分子水平上确定了这种机制,鉴定出了导致这种现象的蛋白质结构。

这些年,科学界认为“精准医学”可能是解决许多疾病的必经之路。新生物标志物可以帮助医生和患者预测哪些人适用于哪些特定治疗手段。通过设计药物,对特定类型癌症患者(包括乳腺癌)肿瘤使用RYBP激活药物,就能使治疗过程更加轻松有效。

原始出处:

Mohammad A.M. Ali,et al.RYBP Is a K63-Ubiquitin-Chain-Binding Protein that Inhibits Homologous Recombination Repair.Cell Reports, Vol. 22, Issue 2, p383–395

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    2018-12-27 维他命
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    2018-01-12 yxch36
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    2018-01-12 jambiya
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    2018-01-10 林3301

    多学点.多多了解

    0

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    2018-01-10 戒馋,懒,贪

    谢谢分享学习了

    0

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