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© K. Stapleford, M. Vignuzzi, I. Bonne, C. Schmitt, J-M. Panaud
Chikungunya virus emerging from infected C6/36 mosquito cells (Aedes albopictus)
Publication : Proceedings of the National Academy of Sciences of the United States of America

Arbovirus high fidelity variant loses fitness in mosquitoes and mice

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Proceedings of the National Academy of Sciences of the United States of America - 06 Sep 2011

Coffey LL, Beeharry Y, Bordería AV, Blanc H, Vignuzzi M

Link to Pubmed [PMID] – 21896755

Proc. Natl. Acad. Sci. U.S.A. 2011 Sep;108(38):16038-43

The error rate of RNA-dependent RNA polymerases (RdRp) affects the mutation frequency in a population of viral RNAs. Using chikungunya virus (CHIKV), we describe a unique arbovirus fidelity variant with a single C483Y amino acid change in the nsP4 RdRp that increases replication fidelity and generates populations with reduced genetic diversity. In mosquitoes, high fidelity CHIKV presents lower infection and dissemination titers than wild type. In newborn mice, high fidelity CHIKV produces truncated viremias and lower organ titers. These results indicate that increased replication fidelity and reduced genetic diversity negatively impact arbovirus fitness in invertebrate and vertebrate hosts.

http://www.ncbi.nlm.nih.gov/pubmed/21896755