Inhibition of nervous necrosis virus by ribavirin in a zebrafish larvae model

被引:18
作者
Morick, Danny [1 ]
Saragovi, Amijai [1 ]
机构
[1] Hebrew Univ Jerusalem, Dept Pathol & Immunol, Lautenberg Ctr Gen & Tumor Immunol, Hadassah Med Sch, IL-91120 Jerusalem, Israel
关键词
Nervous necrosis virus; Ribavirin; Zebrafish; Larvae; IL-1; beta; ATLANTIC HALIBUT NODAVIRUS; RECOMBINANT CAPSID PROTEIN; DOUBLE-STRANDED-RNA; IMMUNE-RESPONSE; EPINEPHELUS-SEPTEMFASCIATUS; SEVENBAND GROUPER; CELL-LINES; FISH; BETANODAVIRUS; VACCINE;
D O I
10.1016/j.fsi.2016.11.015
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
The guanosine analog ribavirin is a broad-spectrum antiviral drug, mostly used in human clinical practice. It has in vitro and in vivo activity against a broad range of RNA and DNA viruses. Here, we report that treatment of zebrafish larvae with ribavirin prior to infection with nervous necrosis virus (NNV) significantly reduces the mortality caused by the virus during the first 10 days post-infection. The RNA genome of NNV harvested from ribavirin-treated infected larvae contains three synonymous and one single non-synonymous mutation, resulting in the replacement of a serine codon with a glycine codon in the RNA-dependent RNA polymerase gene. Adding increasing amounts of guanosine to ribavirin prior to larvae infection did not impede the antiviral activity. Ribavirin treatment of uninfected larvae reduces the basal level of IFNy, but increases the level of IL-1 beta mRNA expression. Furthermore, infecting larvae with NNV following ribavirin treatment reduces the expression levels of IFN gamma, IFN-I, Mx, and TNF-alpha genes, while the expression of IL-1 beta is increased. These results suggest that cytokine modulation plays an important role in the activity of ribavirin against NNV. Mortality of more than 40 species of teleost fish, mostly larvae and juveniles, from NNV is a major obstacle in hatcheries, and impedes the supply of young fish to farms. Hence, cost-effective ribavirin treatment should be considered as an efficient means to reduce the peril of NNV. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:537 / 544
页数:8
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