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PNAS:新发现!抗癌药物或有助于治疗HPV感染

2018-12-04 周悦 生物探索

抗癌药物vorinostat、belinostat和panobinostat或可以被用于治疗由人乳头瘤病毒(HPV)引起的感染。

抗癌药物vorinostat、belinostat和panobinostat或可以被用于治疗由人乳头瘤病毒(HPV)引起的感染

近日,阿拉巴马大学伯明翰分校(University of Alabama at Birmingham)的研究人员发现,抗癌药物vorinostat、belinostat和panobinostat或可以被用于治疗由人乳头瘤病毒(HPV)引起的感染


图片来源: public domain

很多人都知道,HPV是导致宫颈癌的罪魁祸首。其实,目前发现的HPV也有不同的型别,带来的健康风险也有所不同。业界也有针对HPV感染的高效疫苗,比如说近日默沙东被批准的HPV疫苗Gardasil 9(加卫苗,9价),覆盖了9种HPV类型,可预防宫颈癌、外阴癌、阴道癌和肛门癌以及生殖器疣。

但是,HPV疫苗需要在性生活之前注射,因为它对现有的HPV感染没有治疗效果。根据世界卫生组织的数据,2012年世界范围内HPV感染导致约266,000例宫颈癌死亡。

“当下,迫切需要安全、有效和廉价的治疗药物。”论文的主要作者UAB生物化学和分子遗传学系N. Sanjib Banerjee博士如是说。

但HPVs不能在常规细胞培养中繁殖,这也阻碍了对其致病作用的研究。

UAB生物化学和分子遗传学系Louise Chow博士和Thomas Broker博士的实验室几十年来一直在致力于研究HPV和宿主的相互作用。他们发现HPV的产生依赖于上皮细胞分化成全层鳞状上皮细胞。此外,HPV在这些分化细胞中重新激活宿主DNA复制,使复制蛋白和底物能够支持病毒DNA的扩增。

Banerjee和同事们假设,组蛋白去乙酰化酶(HDACs)抑制剂会抑制HPV DNA扩增,因为它们已知的破坏染色体DNA复制的机制。

2009年,Chow和Broker实验室曾开发一种潜在的抗HPV(针对HPV-18)药物临床前研究的理想模型。如今,他们在这模型基础上发现,如他们所料,抗癌药vorinostat能有效抑制HPV-18 DNA扩增和病毒产生。

重要的是,vorinostat还诱导了一部分分化细胞中被称为凋亡的程序性细胞死亡。当染色体DNA复制被打断时,细胞死亡可能是由于DNA断裂造成的。另外两种HDAC抑制剂belinostat和panobinostat也获得了类似的结果。

Banerjee 表示,“在这些详细研究的基础上,我们认为HDAC抑制剂是治疗良性HPV感染的有前途的化合物。”

原始出处:N. Sanjib Banerjee, Dianne W. Moore, Thomas R. Broker, et al. Vorinostat, a pan-HDAC inhibitor, abrogates productive HPV-18 DNA amplification. PNAS. November 20, 2018

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    2018-12-12 drwjr
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    2018-12-05 sunylz
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    2018-12-05 kafei

    学习了谢谢

    0

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