DNA-PK inhibition synergizes with oncolytic virus M1 by inhibiting antiviral response and potentiating DNA damage.

DNA-PK inhibition synergizes with oncolytic virus M1 by inhibiting antiviral response and potentiating DNA damage.
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DNA-PK 抑制通过抑制抗病毒反应并增强 DNA 损伤,与溶瘤病毒 M1 产生协同作用。

DOI:
10.1038/s41467-018-06771-4
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发表时间:
2018-10-18
影响因子:
16.6
通讯作者:
Yan G
Yan G
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Xiao X;Liang J;Huang C;Li K;Xing F;Zhu W;Lin Z;Xu W;Wu G;Zhang J;Lin X;Tan Y;Cai J;Hu J;Chen X;Huang Y;Qin Z;Qiu P;Su X;Chen L;Lin Y;Zhang H;Yan G

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溶瘤病毒疗法是一种很有前途的治疗策略,它使用具有复制能力的病毒来选择性地破坏恶性肿瘤。然而,某些溶瘤病毒(OV)的治疗效果在癌症患者中不同。因此,有必要通过合理设计组合策略来克服对OV的抗性。在这里,通过抗癌药物筛选,我们表明,DNA依赖性蛋白激酶(DNA-PK)抑制癌细胞对OV M1的敏感性,并提高体内难治性癌症模型和患者肿瘤样本的治疗效果。M1病毒的感染触发干扰素(IFN)的转录和抗病毒应答的激活,这可以通过DNA-PK抑制剂(DNA-PKI)的预处理而被消除,导致恶性肿瘤中OV M1的选择性增强复制。此外,DNA-PK抑制促进由M1病毒诱导的DNA损伤反应,导致肿瘤细胞凋亡增加。总之,我们的研究确定了DNA-PKI和OV M1的组合作为癌症的潜在治疗方法。
Oncolytic virotherapy is a promising therapeutic strategy that uses replication-competent viruses to selectively destroy malignancies. However, the therapeutic effect of certain oncolytic viruses (OVs) varies among cancer patients. Thus, it is necessary to overcome resistance to OVs through rationally designed combination strategies. Here, through an anticancer drug screening, we show that DNA-dependent protein kinase (DNA-PK) inhibition sensitizes cancer cells to OV M1 and improves therapeutic effects in refractory cancer models in vivo and in patient tumour samples. Infection of M1 virus triggers the transcription of interferons (IFNs) and the activation of the antiviral response, which can be abolished by pretreatment of DNA-PK inhibitor (DNA-PKI), resulting in selectively enhanced replication of OV M1 within malignancies. Furthermore, DNA-PK inhibition promotes the DNA damage response induced by M1 virus, leading to increased tumour cell apoptosis. Together, our study identifies the combination of DNA-PKI and OV M1 as a potential treatment for cancers.
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