Suramin inhibits Zika virus replication by interfering with virus attachment and release of infectious particles

被引:78
作者
Albulescu, Irina C. [1 ]
Kovacikova, Kristina [1 ]
Tas, Ali [1 ]
Snijder, Eric J. [1 ]
van Hemert, Martijn J. [1 ]
机构
[1] Leiden Univ, Med Ctr, Dept Med Microbiol, Mol Virol Lab, Leiden, Netherlands
关键词
POTENT INHIBITOR; ENVELOPE PROTEIN; ENDOTHELIAL-CELLS; DENGUE VIRUS; CHIKUNGUNYA; DRUG; BINDING; IDENTIFICATION; PATHOGENESIS; SCREEN;
D O I
10.1016/j.antiviral.2017.04.016
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Zika virus (ZIKV) is a mosquito-borne flavivirus that mostly causes asymptomatic infections or mild disease characterized by low-grade fever, rash, conjunctivitis, and malaise. However, the recent massive ZIKV epidemics in the Americas have also linked ZIKV infection to fetal malformations like microcephaly and Guillain-Barre syndrome in adults, and have uncovered previously unrecognized routes of vertical and sexual transmission. Here we describe inhibition of ZIKV replication by suramin, originally an anti parasitic drug, which was more recently shown to inhibit multiple viruses. In cell culture-based assays, using reduction of cytopathic effect as read-out, suramin had an EC50 of similar to 40 mu M and a selectivity index of 48. In single replication cycle experiments, suramin treatment also caused a strong dose-dependent decrease in intracellular ZIKV RNA levels and a >3-log reduction in infectious progeny titers. Time-of addition experiments revealed that suramin inhibits a very early step of the replication cycle as well as the release of infectious progeny. Only during the first 2 h of infection suramin treatment strongly reduced the fraction of cells that became infected with ZIKV, suggesting the drug affects virus binding/entry. Binding experiments at 4 degrees C using S-35-labeled ZIKV demonstrated that suramin interferes with attachment to host cells. When suramin treatment was initiated post-entry, viral RNA synthesis was unaffected, while both the release of genomes and the infectivity of ZIKV were reduced. This suggests the compound also affects virion biogenesis, possibly by interfering with glycosylation and the maturation of ZIKV during its traffic through the secretory pathway. The inhibitory effect of suramin on ZIKV attachment and virion biogenesis and its broad-spectrum activity warrant further evaluation of this compound as a potential therapeutic. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:230 / 236
页数:7
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