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Mol Cell:识别出癌症中的DNA修复基因或有望帮助改善癌症疗法

2022-05-31 生物谷 生物谷

来自伯明翰大学等机构的科学家们通过研究发现了癌细胞修复自身DNA损伤的一种新方式。

53BP1-RIF1-shieldin通路或能通过抑制双链断裂处(DSBs)DNA末端的核分解降解来维持基因组的稳定性,尽管RIF1能通过磷酸化53BP1与受损的染色质发生相互作用,并促进shieldin复合体被招募到DSBs中,但目前研究人员并不清楚是否其它调节线索会促进这一反应。近日,一篇发表在国际杂志Molecular Cell上题为“H3K4 methylation by SETD1A/BOD1L facilitates RIF1-dependent NHEJ”的研究报告中,来自伯明翰大学等机构的科学家们通过研究发现了癌细胞修复自身DNA损伤的一种新方式。

图片来源:Vcpmartin/Wikimedia/ CC BY-SA 4.0

研究者表示,这些研究结果对于理解癌细胞如何对化疗和放疗产生反应非常重要,同时也能帮助研究人员发现癌细胞会采用哪种新方法来对靶向性疗法产生耐受性,这或许就能促进临床研究人员决定不同的癌症疗法,进而更有针对性地治疗特定患者。修复DNA的损伤对于细胞维持健康非常重要,同时还能帮助预防诸如癌症发生等多种疾病,理解DNA修复的工作机制对于更好地理解癌症发生非常重要,同时还能帮助理解诸如放疗和化疗等抗癌疗法如何能有效地诱导杀灭癌细胞的DNA损伤。

这项研究中,研究人员在DNA修复过程中识别出了此前未知的两种特殊蛋白,即SETD1A 和BOD1L,这些蛋白质能修饰与DNA结合的称之为组蛋白的其它蛋白,移除这两种蛋白质或能改变DNA被修复的方式,同时还会使得癌细胞对放疗更加敏感,SETD1A 和BOD1L蛋白的缺失会使得癌细胞对称之为PARP抑制剂的特定抗癌药物更加耐药。

图片来源:https://pubmed.ncbi.nlm.nih.gov/35439434/

研究者Martin Higgs博士解释道,这项研究中,我们首次将这些基因直接与癌症中的DNA修复联系起来,相关研究结果或许能潜在改变癌症患者被确定为治疗对象的方式,以及其如何对不同的药物产生耐受性,同时还能帮助确定哪种策略能改善疗法的策略以及患者的治疗结局。

最后,研究人员希望本文研究最终能帮助开发出新型治疗性抑制剂,从而促进临床研究人员对已经对特定疗法产生耐受性的癌症再次敏感,并改善癌症患者的治疗。

原始出处:

Rachel Bayley, Valerie Borel, Rhiannon J Moss, et al. H3K4 methylation by SETD1A/BOD1L facilitates RIF1-dependent NHEJMolecular Cell (2022), doi:10.1016/j.molcel.2022.03.030

 

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    2023-02-01 mnda
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    2022-08-09 tz8029

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    2022-11-15 维他命
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    2022-06-02 jambiya

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