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© Institut Pasteur
Corne d'Ammon (ou hippocampe) de renard atteint de rage sauvage. Coloration avec un conjugué fluorescent sur la nucléocapside du virus.
Publication : Antiviral research

Pyrimethamine inhibits rabies virus replication in vitro

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Antiviral research - 25 Oct 2018

Rogée S, Larrous F, Jochmans D, Ben-Khalifa Y, Neyts J, Bourhy H

Link to Pubmed [PMID] – 30367894

Antiviral Res. 2019 01;161:1-9

Rabies virus transmits from animals to humans and causes encephalitis. Every year more than 15 million people receive a post exposure prophylaxis (PEP) treatment that is highly effective in the prevention of rabies disease. However, when clinical symptoms appear, for example in people who did not receive PEP, rabies is almost invariably fatal. Due to the limited access to PEP in some target populations, mostly in Asia and in Africa, rabies causes at least 59,000 deaths a year. PEP is not effective after the onset of symptoms and attempts to develop a treatment for clinical rabies have been unsuccessful. After screening a library of 385 FDA-approved drugs, we found that pyrimethamine inhibits rabies infection in vitro through the inhibition of adenosine synthesis. In addition, this compound shows a synergistic interaction with ribavirin. Unfortunately, in rabies infected-mice, pyrimethamine showed no efficacy. One possible explanation may be that the antiviral effect is negated by the observed interference of pyrimethamine with the innate immune response.

https://www.ncbi.nlm.nih.gov/pubmed/30367894