Protection of rhesus macaques from vaginal infection by vaginally delivered maraviroc, an inhibitor of HIV-1 entry via the CCR5 co-receptor.

Protection of rhesus macaques from vaginal infection by vaginally delivered maraviroc, an inhibitor of HIV-1 entry via the CCR5 co-receptor.
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DOI:
10.1086/655661
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发表时间:
2010-09-01
期刊:
The Journal of infectious diseases
影响因子:
--
通讯作者:
Moore JP
Moore JP
中科院分区:
其他
文献类型:
--
作者:
Veazey RS;Ketas TJ;Dufour J;Moroney-Rasmussen T;Green LC;Klasse PJ;Moore JP

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一种有效的阴道杀微生物剂可以减少人类免疫缺陷病毒1型(HIV-1)向妇女的传播。在临床开发的候选杀菌剂中有Maraviroc (MVC),这是一种结合CCR5共受体并阻止HIV-1进入细胞的小分子药物。系统地给药,MVC减少了hiv -1感染者的病毒载量,但其预防传播的能力尚未得到检验。我们现在已经评估了MVC作为阴道杀菌剂的作用,使用了一个严格的模型,包括用高剂量的使用ccr5的病毒SHIV-162P3攻击恒河猴。凝胶配制的处方级MVC提供剂量依赖性保护,0.5 mM (0.25 mg/ml)时最大保护量为一半。保护的持续时间是短暂的;MVC应用程序与病毒挑战之间的延迟越长,保护越少(T1/2 ~ 4 h)。正如预期的那样,MVC既不能抵抗使用cxcr4的病毒SHIV-KU1的攻击,也不能加重感染后的病毒血症。这些发现证实了MVC作为女性阴道杀菌剂的发展,并应指导临床计划。
An effective vaginal microbicide could reduce human immunodeficiency virus type 1 (HIV-1) transmission to women. Among microbicide candidates in clinical development is Maraviroc (MVC), a small molecule drug that binds the CCR5 co-receptor and impedes HIV-1 entry into cells. Delivered systemically, MVC reduces viral load in HIV-1-infected people, but its ability to prevent transmission is untested. We have now evaluated MVC as a vaginal microbicide, using a stringent model involving challenge of rhesus macaques with a high-dose of a CCR5-using virus, SHIV-162P3. Gel-formulated, prescription-grade MVC provided dose-dependent protection, half-maximally at 0.5 mM (0.25 mg/ml). The duration of protection was transient; the longer the delay between MVC application and virus challenge, the less protection (T1/2 ~ 4 h). As expected, MVC neither protected against challenge with a CXCR4-using virus, SHIV-KU1, nor exacerbated post-infection viremia. These findings validate MVC development as a vaginal microbicide for women, and should guide clinical programs.
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