Clin Cancer Res:突破常识!病毒竟成新一代抗癌“神器”

2018-06-02 Michael,Zoe 转化医学网

还记得03年的SARS吗?还记得16、17年造成非洲死亡数千万人的塞卡病毒吗?病毒一直以来让人们听起来闻风丧胆,是死神的化身!但在近期的一些重要研究中,病毒疗法正成为临床上重要的抗癌药物,显示出与免疫检查点抑制剂的协同作用。由于这些药物尚未发展成具有三重抗肿瘤的选择性,所以通过彻底重新设计病毒衣壳来提高血管内递送后的肿瘤选择性可以进一步提高治疗指数。


导  读

还记得03年的SARS吗?还记得16、17年造成非洲死亡数千万人的塞卡病毒吗?病毒一直以来让人们听起来闻风丧胆,是死神的化身!但在近期的一些重要研究中,病毒疗法正成为临床上重要的抗癌药物,显示出与免疫检查点抑制剂的协同作用。由于这些药物尚未发展成具有三重抗肿瘤的选择性,所以通过彻底重新设计病毒衣壳来提高血管内递送后的肿瘤选择性可以进一步提高治疗指数。

Cardiff大学最新的研究表明,一种能够完全破坏癌细胞而不影响健康细胞的癌症治疗方法很快将在临床抗癌治疗中得以实现。研究人员已经成功地“培养”了一种呼吸道病毒,用以识别卵巢癌并且在不感染其他细胞的情况下彻底摧毁肿瘤细胞。重组病毒也可用于治疗其他癌症,如乳腺癌胰腺癌肺癌和口腔癌。这篇文章发表于最新的临床癌症研究(Clinical Cancer Research)中。

来自Cardiff大学医学院的Alan Parker博士说:“重组的病毒已经被用于基因治疗,可治疗一系列疾病,这表明他们可以从威胁生命的微生物转化为帮助科学家治疗人类疾病的药物”。在癌症治疗中,到目前为止,重组病毒不能选择性地识别癌细胞,它还会感染健康的细胞,导致不必要的副作用。

病毒与肿瘤细胞作用位点计算机重建模型

“我们采用了一种常见的且经过充分研究的病毒,并对其进行了完全重新设计,以使其不再附着于非癌细胞,而是靶向特定的标记蛋白质αvβ6整合素,这对某些癌细胞是独有的,允许该病毒靶向攻击肿瘤细胞。“在这种情况下,我们将重组病毒引入卵巢癌,并成功识别并摧毁卵巢癌细胞。这是一项令人兴奋的进步,为患有各种癌症的患者提供真正的潜力”。Alan Parker博士说道。

一旦病毒进入癌细胞,它会在细胞内连续复制,生成数千个自身拷贝,然后裂解细胞,从而在该过程中破坏细胞。然后新释放的病毒拷贝可以结合并感染相邻的癌细胞并重复相同的循环,最终完全去除肿瘤块。病毒还能激活人体的天然免疫系统,帮助其识别并破坏恶性细胞。

重组的病毒来自称为腺病毒的一组呼吸道病毒。使用这些病毒的优点是它们相对容易操作并且已经被安全地用于其他癌症治疗。用重组病毒可以识别卵巢癌,乳腺癌,胰腺癌,肺癌和口腔癌中常见的靶点,同时可识别多种肿瘤共同的肿瘤抗原。

抗癌病毒与PBS的对照实验

对病毒DNA的进一步改进也可以使病毒在感染癌细胞的过程中产生抗癌药物,如抗体。这可以有效地将肿瘤细胞转化为生产药物的工厂,从而导致其自身的破坏。该研究在实验室已经进行成功消除了小鼠卵巢癌肿块,但尚未达进入临床试验。下一步将在其他癌症中一起测试该技术,以使其在五年的时间内进入临床试验。

来自英国癌症研究所的Catherine Pickworth博士说:“看到这种病毒能够识别癌细胞标记物,并能够在实验室中感染并杀死卵巢癌细胞,这实在是太令人鼓舞了。利用来自大自然的病毒和最新的纳米技术来劫持并消灭肿瘤细胞,是未来癌症研究中具有极大潜力的领域,下一步将进行更多研究,以明确这是否是一种安全有效的抗癌策略”。

尽管现在溶瘤病毒与PD-L1免疫抗癌联合使用具有不错的前景,但尚不明确是否可以利用本文所采取的重组病毒技术来提高PD-L1的联合抗癌效果,这或许为今后的多技术多学科肉融合提供了最基本的技术参考,相信在不远的未来,研究人员一定会提高三重联合抗癌的治疗效果。

原始出处:

Hanni Uusi-Kerttula,et al.Ad5NULL-A20 - a tropism-modified, αvβ6 integrin-selective oncolytic adenovirus for epithelial ovarian cancer therapies.Clin Cancer Res May 24 2018 DOI:10.1158/1078-0432.CCR-18-1089

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    2018-06-04 Jackie Li

    学习

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    2018-06-03 kafei

    学习了谢谢

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    2018-06-02 bapan0434

    训化的妖魔鬼怪都成为神仙的坐骑

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    2018-06-02 131****1460

    学习了受益匪浅

    0

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    2018-06-02 清风拂面

    谢谢分享学习

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    2018-06-02 1e0f8808m18(暂无匿称)

    事物都具两面性.

    0

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