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Nature:科学家揭示染色质如何指导DNA修复 为开发癌症治疗药物提供新契机

2016-06-25 佚名 生物谷

 一直以来,来自哥本哈根大学的Anja Groth教授以及她的研究团队对人体内多种特定细胞类型的发育和维持进行了大量研究,最近他们又取得了新的突破性进展,并将研究结果发表在国际学术期刊Nature上。Anja Groth教授对他们的工作进行了这样的总结:“在这项研究中,我们证明了细胞如何通过组蛋白修饰指引一种细胞内DNA修复蛋白到达DNA损伤位置。癌细胞快速分裂的过程中会产生许多DNA损

 

一直以来,来自哥本哈根大学的Anja Groth教授以及她的研究团队对人体内多种特定细胞类型的发育和维持进行了大量研究,最近他们又取得了新的突破性进展,并将研究结果发表在国际学术期刊Nature上。

Anja Groth教授对他们的工作进行了这样的总结:“在这项研究中,我们证明了细胞如何通过组蛋白修饰指引一种细胞内DNA修复蛋白到达DNA损伤位置。癌细胞快速分裂的过程中会产生许多DNA损伤,如果没有了有效的修复系统,这些癌细胞就会死亡,这意味着癌细胞高度依赖DNA修复机制,因此我们发现的这一新分子机制将会为癌症治疗提供一个非常具有潜力的靶点。”

通过与纽约的Dinshaw Patel等人合作,研究人员获得了结合在组蛋白上的TONSL蛋白的详细晶体结构,并进一步了解了该蛋白如何发挥作用,为设计特异性结合TONSL的抑制剂分子,防止其结合损伤DNA提供了契机。这样的抑制剂分子或可通过阻断DNA修复,积累DNA损伤,最终促进癌细胞死亡达到治疗癌症的目的。该研究团队目前正在进行此类小分子药物的开发。

另外一位研究人员表示:“当我们的细胞发生分裂,不仅是DNA得到了复制,表观遗传信息也得到了复制,这对于细胞维持身份保持健康具有非常重要的意义。我们发现TONSL分子能够特异性识别在DNA复制过程中形成的一种染色质特征并对其进行解读从而促进DNA的损伤修复。”

该研究为深入理解染色质如何指导细胞内的DNA损伤修复过程提供了新的基础,同时也为开发用于癌症治疗的小分子抑制剂提供了可能。

原始出处:


Saredi G, Huang H, Hammond CM, Alabert C, Bekker-Jensen S, Forne I, Reverón-Gómez N, Foster BM, Mlejnkova L, Bartke T, Cejka P, Mailand N, Imhof A, Patel DJ, Groth A.H4K20me0 marks post-replicative chromatin and recruits the TONSL-MMS22L DNA repaircomplex.

Nature. 2016 Jun 22. doi: 10.1038/nature18312. [Epub ahead of print]

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    2016-09-10 liye789132251
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    2016-06-27 jambiya
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