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© Pierre Gounon
Culture de cellules infectées par le virus Ebola, virus isolé sur un malade de Côte d'Ivoire par Leguenno en 1995. Virus de la famille des Filoviridae genre Filovirus. Réservoir naturel et mode de transmission inconnus. Infections secondaires par contact direct avec sang contaminé ou sécrétions corporelles. Mortalité dans 50 à 90% des cas. Soudan, République Démocratique du Congo, Côte d'Ivoire (Grossissement X 40000).
Publication : Nature communications

Ebola viral dynamics in nonhuman primates provides insights into virus immuno-pathogenesis and antiviral strategies

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature communications - 01 Oct 2018

Madelain V, Baize S, Jacquot F, Reynard S, Fizet A, Barron S, Solas C, Lacarelle B, Carbonnelle C, Mentré F, Raoul H, de Lamballerie X, Guedj J

Link to Pubmed [PMID] – 30275474

Nat Commun 2018 10;9(1):4013

Despite several clinical trials implemented, no antiviral drug could demonstrate efficacy against Ebola virus. In non-human primates, early initiation of polymerase inhibitors favipiravir and remdesivir improves survival, but whether they could be effective in patients is unknown. Here we analyze the impact of antiviral therapy by using a mathematical model that integrates virological and immunological data of 44 cynomolgus macaques, left untreated or treated with favipiravir. We estimate that favipiravir has a ~50% efficacy in blocking viral production, which results in reducing virus growth and cytokine storm while IFNα reduces cell susceptibility to infection. Simulating the effect of delayed initiations of treatment, our model predicts survival rates of 60% for favipiravir and 100% for remdesivir when treatment is initiated within 3 and 4 days post infection, respectively. These results improve the understanding of Ebola immuno-pathogenesis and can help optimize antiviral evaluation in future outbreaks.

https://www.ncbi.nlm.nih.gov/pubmed/30275474