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宫颈癌细胞对水疱性口炎病毒诱导的溶瘤作用的敏感性:人乳头瘤病毒感染的潜在作用。

Sensitivity of cervical carcinoma cells to vesicular stomatitis virus-induced oncolysis: potential role of human papilloma virus infection.

机构信息

Centre for Cancer Therapeutics, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.

出版信息

Int J Cancer. 2012 Aug 1;131(3):E204-15. doi: 10.1002/ijc.27404. Epub 2012 Jan 11.

Abstract

High-risk carcinogenic subtypes of human papilloma virus (HPV) are associated with the development of squamous cell carcinomas of the cervix (CC) and a subset of head and neck (HNSCC). Recurrent metastatic diseases of these sites display a dismal prognosis. Therefore, there is an urgent need to uncover innovative therapeutic strategies in this clinical setting. Oncolytic viruses, including vesicular stomatitis virus (VSV), were identified due to their ability to specifically target tumor cells that generally display defects in interferon (IFN) signaling. HPV expressed proteins can inhibit IFN signaling; therefore, HPV-infected cells may be particularly sensitive to VSV oncolysis. In this study, we evaluated the sensitivity of four CC (HPV+) and four HNSCC (HPV-) derived cell lines to VSV oncolysis. Interestingly, the CC cell lines were consistently more sensitive to VSV cytotoxicity than the HNSCC cell lines tested. Exogenous IFN addition or infection with two attenuated VSV variants that are more susceptible to IFN inhibition failed to attenuate VSV oncolysis in hypersensitive CC cell lines. Furthermore, the expression of HPV-E6, that inhibits IFN receptor signaling, in the VSV-resistant HNSCC cell line SCC25 attenuated VSV-induced IFN response and significantly enhanced VSV cytotoxicity. Finally, differential VSV infection and replication was confirmed in xenograft murine tumor models and explant tumor tissues from two patients with CC. Taken together, these results demonstrate that HPV-infected cells are susceptible to oncolytic virus therapy and that this approach may represent a novel therapeutic approach in HPV positive CC and HNSCC patients.

摘要

高危致癌型人乳头瘤病毒 (HPV) 与宫颈鳞状细胞癌 (CC) 和一部分头颈部鳞状细胞癌 (HNSCC) 的发展有关。这些部位的复发性转移性疾病预后较差。因此,迫切需要在这一临床环境中发现创新的治疗策略。溶瘤病毒,包括水疱性口炎病毒 (VSV),由于其能够特异性靶向干扰素 (IFN) 信号通路缺陷的肿瘤细胞而被发现。HPV 表达的蛋白可以抑制 IFN 信号通路;因此,HPV 感染的细胞可能对 VSV 溶瘤作用特别敏感。在这项研究中,我们评估了四种 CC(HPV+)和四种 HNSCC(HPV-)衍生细胞系对 VSV 溶瘤作用的敏感性。有趣的是,CC 细胞系比测试的 HNSCC 细胞系对 VSV 细胞毒性更敏感。外源性 IFN 添加或感染两种对 IFN 抑制更敏感的减毒 VSV 变体未能减弱对高敏感 CC 细胞系的 VSV 溶瘤作用。此外,HPV-E6 的表达,抑制 IFN 受体信号通路,在 VSV 抗性 HNSCC 细胞系 SCC25 中减弱了 VSV 诱导的 IFN 反应,并显著增强了 VSV 细胞毒性。最后,在异种移植小鼠肿瘤模型和两名 CC 患者的肿瘤组织标本中证实了差异的 VSV 感染和复制。总之,这些结果表明 HPV 感染的细胞对溶瘤病毒治疗敏感,并且该方法可能代表 HPV 阳性 CC 和 HNSCC 患者的一种新的治疗方法。

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