Nature Chem Bio:旧药新用——GSK893能够有效对抗两类RNA病毒感染

2016-05-09 生物谷 生物谷

(图片摘自www.sciencealert.com) 长久以来,科学创新往往离不开偶然的发现,最近又出现了一个鲜活的例子:之前由于研究意义不大而被丢弃的一种药物被发现能够有效对抗两类感染人体的病毒。 该药物叫做GSK983,来自斯坦福大学的化学家Chaitan Khosla发现该药物能够帮助人源细胞抵抗登革热病毒以及VEEV(委内瑞拉马脑炎病毒)感染。 通过大规模的筛选,作者们发现该药物

(图片摘自www.sciencealert.com)

长久以来,科学创新往往离不开偶然的发现,最近又出现了一个鲜活的例子:之前由于研究意义不大而被丢弃的一种药物被发现能够有效对抗两类感染人体的病毒。

该药物叫做GSK983,来自斯坦福大学的化学家Chaitan Khosla发现该药物能够帮助人源细胞抵抗登革热病毒以及VEEV(委内瑞拉马脑炎病毒)感染。

通过大规模的筛选,作者们发现该药物能够有效阻断病毒RNA的合成,从而阻断病毒的复制过程。

不过,特异性不高是该药物唯一的问题。作者发现GSK983除了能够阻断病毒RNA合成之外,还能够同样阻断人类细胞DNA的合成,所以,该药物在杀死病毒的同时也会杀死人类细胞。

研究者们通过进行梯度稀释降低了这一副作用的发生风险。通过确定一种有效浓度,该药物能够在保证不影响内源DNA合成的同时对病毒进行杀伤。这一结果表明GSK983能够安全地用于动物与人疾病治疗中。

这一新的发现是斯坦福大学最近展开的"抗病毒新型疗法研发"项目的一部分成果。研究者们希望通过研究找到能够抑制常见感冒病毒与埃博拉病毒肆虐的方法,然而却种花得豆,得到了上述的结果。

虽然现在断言研究者们已经取得了成功还为时尚早,但是由于自然界中毒性最强烈的病毒大多以RNA为遗传物质,这一发现将会成为十分实用的工具。

DNA是我们的遗传物质,RNA则是将DNA中储存的信息进行解码,加以活化的工具,它们被称为临时性的信使。虽然藏在体内的病毒可能依赖于DNA或RNA,但RNA病毒通常变异几率较大,因此对疫苗具有较强的耐受性。

RNA本身十分不稳定,也没有矫正错误的功能,这意味着RNA病毒更加容易通过该表其表面的抗原类型而逃脱自体免疫系统的识别。埃博拉病毒与塞卡病毒就是其中有名的代表。

基于这一研究,斯坦福大学的研究者们希望研制出一种能够通过阻断病毒合成RNA来抵抗病毒感染的药物。相关结果发表在《Nature Chemical Biology》杂志上。

原始出处

Scientists just 'rediscovered' a drug that's effective against two human viruses

 

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    2017-01-02 liye789132251
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    2016-05-15 sunylz
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    2016-05-10 卡莲

    学习了哈

    0

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    2016-05-10 1dd8a7c5m95(暂无匿称)

    学习了,希望有新的突破!

    0

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抗体“鸡尾酒”可延迟猴子感染艾滋病

图片来源:carbonated.tv本周在线发表于《自然》的一篇论文显示,单次注射针对艾滋病病毒(HIV)的抗体可以保护猴子在近6个月中不受该病毒的猿猴版本——猴/人免疫缺陷病毒嵌合体(SHIV)的感染。这项研究提供了防治HIV-1病毒的一个概念验证,可能对于抑制艾滋病在高危人群中的传播有重要意义动物在接触到高剂量病毒前的一到两天内如果获得了从感染了HIV-1病毒的患者体内提取的抗