In vitro susceptibility of geographically and temporally distinct Zika viruses to favipiravir and ribavirin.

Abstract:

BACKGROUND:Zika virus, a previously neglected mosquito-borne virus, is prompting worldwide concern because of its connection with congenital defects, Guillain-Barré syndrome, meningoencephalitis and myelitis in infected individuals. However, no specific antiviral therapy is available at present. In this study, we investigated the in vitro susceptibility of geographically and temporally distinct Zika viruses against the RNA polymerase inhibitors, favipiravir (T-705) and ribavirin. METHODS:The in vitro activity of each drug and a 1:1 mixture combination was assessed against five geographically and temporally distinct Zika strains by plaque reduction assay (PRA), the gold standard phenotypic method. RESULTS:We showed that both drugs exhibit in vitro inhibitory activity against five different Zika strains isolated in different years and continents, with mean 50% inhibitory concentration (IC50) values of 35 ±14 and 35 ±20 µM, respectively, by PRA. We did not observe a synergistic effect when both drugs were combined at the equimolar concentration (IC50 =33 ±11 µM). CONCLUSIONS:These results indicate that T-705 has the potential to be used in patients with complicated diseases and/or those individuals presenting with significant comorbidities.

journal_name

Antivir Ther

journal_title

Antiviral therapy

authors

Baz M,Goyette N,Griffin BD,Kobinger GP,Boivin G

doi

10.3851/IMP3180

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

613-618

issue

7

eissn

1359-6535

issn

2040-2058

journal_volume

22

pub_type

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