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Compound F779-0434 causes synthetic lethality in BRCA2-deficient cancer cells by disrupting RAD52-ssDNA association

机译:化合物F779-0434通过破坏RAD52-SSDNA协会使BRCA2缺陷型癌细胞中的合成致死性

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摘要

Maintenance of genomic integrity is essential for the survival of all organisms. Homologous recombination (HR) is the major pathway for high-fidelity repair of DNA double-stranded breaks (DSBs). In addition to the classic BRCA-RAD51 pathway, another secondary HR sub-pathway dependent on RAD52 has been suggested to be functioning in mammalian cells. Importantly, RAD52 has been shown to be synthetically lethal to BRCA1/2-deficient cells, rendering RAD52 to be a desirable target in cancer therapy. In the current study, we performed a structure-based virtual screening of 47737 drug-like compounds to identify RAD52-specific inhibitors. The top ranked virtual screening hits were further characterized using molecular dynamics simulation and biochemical and cell-based assays. We found that one compound, namely, F779-0434 specifically suppressed the growth of BRCA2-deficient cells and disrupted RAD52-ssDNA interaction in vitro. This RAD52-specific inhibitor identified in the current study is a promising compound for targeted cancer therapy, and it can also be used as a probe to study the mechanisms of DNA repair in human cells.
机译:基因组完整性的维持对于所有生物的存活至关重要。同源重组(HR)是DNA双链断裂(DSB)的高保真修复的主要途径。除了经典的BRCA-RAD51途径之外,已经提出依赖于RAD52的另一次级HR子路径在哺乳动物细胞中运作。重要的是,Rad52已被证明是合成致命的BRCA1 / 2缺陷细胞,使RAD52使RAD52呈现为癌症治疗中的理想目标。在目前的研究中,我们进行了基于结构的虚拟筛选47737种样药化合物,以鉴定rad52特异性抑制剂。使用分子动力学模拟和基于细胞的测定,进一步表征了顶部排名的虚拟筛选命中。我们发现一种化合物,即F779-0434特异性地抑制了BRCA2缺陷细胞的生长,并在体外破坏了RAD52-SSDNA相互作用。目前研究中鉴定的该RAD52特异性抑制剂是针对靶向癌症治疗的有希望的化合物,并且还可以用作研究人体细胞中DNA修复机制的探针。

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  • 来源
    《RSC Advances》 |2018年第34期|共11页
  • 作者单位

    Chengdu Univ Sch Med Chengdu 610106 Sichuan Peoples R China;

    Chengdu Univ Sichuan Ind Inst Antibiot Chengdu 610052 Sichuan Peoples R China;

    Chengdu Univ Sichuan Ind Inst Antibiot Chengdu 610052 Sichuan Peoples R China;

    Chengdu Univ Sichuan Ind Inst Antibiot Chengdu 610052 Sichuan Peoples R China;

    Sichuan Univ Coll Life Sci Chengdu 610064 Sichuan Peoples R China;

    Chengdu Univ Sichuan Ind Inst Antibiot Chengdu 610052 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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