Yellow fever virus is susceptible to sofosbuvir both in vitro and in vivo

PLoS Negl Trop Dis. 2019 Jan 30;13(1):e0007072. doi: 10.1371/journal.pntd.0007072. eCollection 2019 Jan.

Abstract

Yellow fever virus (YFV) is a member of the Flaviviridae family. In Brazil, yellow fever (YF) cases have increased dramatically in sylvatic areas neighboring urban zones in the last few years. Because of the high lethality rates associated with infection and absence of any antiviral treatments, it is essential to identify therapeutic options to respond to YFV outbreaks. Repurposing of clinically approved drugs represents the fastest alternative to discover antivirals for public health emergencies. Other Flaviviruses, such as Zika (ZIKV) and dengue (DENV) viruses, are susceptible to sofosbuvir, a clinically approved drug against hepatitis C virus (HCV). Our data showed that sofosbuvir docks onto YFV RNA polymerase using conserved amino acid residues for nucleotide binding. This drug inhibited the replication of both vaccine and wild-type strains of YFV on human hepatoma cells, with EC50 values around 5 μM. Sofosbuvir protected YFV-infected neonatal Swiss mice and adult type I interferon receptor knockout mice (A129-/-) from mortality and weight loss. Because of its safety profile in humans and significant antiviral effects in vitro and in mice, Sofosbuvir may represent a novel therapeutic option for the treatment of YF. Key-words: Yellow fever virus; Yellow fever, antiviral; sofosbuvir.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antiviral Agents / pharmacology*
  • Chlorocebus aethiops
  • Disease Models, Animal
  • Drug Resistance, Viral*
  • Hep G2 Cells
  • Humans
  • Mice
  • Mice, Knockout
  • RNA, Viral / blood
  • RNA, Viral / drug effects*
  • RNA, Viral / genetics
  • Sofosbuvir / pharmacology*
  • Vero Cells
  • Yellow Fever / blood
  • Yellow Fever / drug therapy*
  • Yellow Fever / pathology
  • Yellow Fever / virology
  • Yellow fever virus / drug effects*
  • Yellow fever virus / genetics

Substances

  • Antiviral Agents
  • RNA, Viral
  • Sofosbuvir

Grants and funding

The financial support was provided by Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ - http://www.faperj.br/ - Grant Number E-26/201.573/2014) and Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq - http://cnpq.br/ - Grant Numbers 306389/2014-2 and 425636/2016-0). TMLS received the funds. This work has received financial support from the National Institute of Science and Technology in Dengue (INCT dengue), a scheme funded by the Brazilian National Science Council (CNPq, Brazil) and Minas Gerais Foundation for Science (FAPEMIG, Brazil). Funding was also provided by National Council for Scientific and Technological Development (CNPq), Ministry of Science, Technology, Information and Communications (no. 465313/2014-0); Ministry of Education/CAPES (no. 465313/2014-0); Research Foundation of the State of Rio de Janeiro/FAPERJ (no. 465313/2014-0) and Oswaldo Cruz Foundation/FIOCRUZ to National Institute for Science and Technology on Innovation on Diseases of Neglected Populations (INCT/IDPN), Center for Technological Development in Health (CDTS), Fiocruz, Rio de Janeiro, RJ, Brazil. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.