Abstract
The fusion glycoproteins of human respiratory syncytial virus (RSV) and human parainfluenza virus type-3 (PIV-3) mediate virus entry and syncytium formation. Interaction between the fusion protein of RSV and RhoA, a small GTPase, facilitates virus-induced syncytium formation. We show here a RhoA-derived peptide inhibits RSV and syncytium formation induced by RSV and PIV-3, both in vitro by inhibition of cell-to-cell fusion and in vivo by reduction of peak titer by 2 log10 in RSV-infected mice. These findings indicate that the interaction between these two paramyxovirus fusion proteins and RhoA is an important target for new antiviral strategies.
MeSH Terms
Amino Acid Sequence
Animals
Cell Fusion
Cells, Cultured
Enzyme-Linked Immunosorbent Assay
Giant Cells/drug effects,physiology,virology
Humans
Mice
Mice, Inbred BALB C
Molecular Sequence Data
Parainfluenza Virus 3, Human/drug effects,genetics,physiology
Peptide Fragments/chemistry,pharmacology
Respiratory Syncytial Virus Infections/physiopathology
Respiratory Syncytial Virus, Human/drug effects,genetics,physiology
Vaccinia virus/physiology
rhoA GTP-Binding Protein/chemistry,physiology
Chemicals
Peptide Fragments
rhoA GTP-Binding Protein
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Pastey M K
Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.
Gower T L
Spearman P W
Crowe J E
Graham B S
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