| Literature DB >> 18287023 |
Guofeng Cheng1, Ana Montero, Pablo Gastaminza, Christina Whitten-Bauer, Stefan F Wieland, Masanori Isogawa, Brenda Fredericksen, Suganya Selvarajah, Philippe A Gallay, M Reza Ghadiri, Francis V Chisari.
Abstract
An amphipathic alpha-helical peptide (C5A) derived from the membrane anchor domain of the hepatitis C virus (HCV) NS5A protein is virocidal for HCV at submicromolar concentrations in vitro. C5A prevents de novo HCV infection and suppresses ongoing infection by inactivating both extra- and intracellular infectious particles, and it is nontoxic in vitro and in vivo at doses at least 100-fold higher than required for antiviral activity. Mutational analysis indicates that C5A's amphipathic alpha-helical structure is necessary but not sufficient for its virocidal activity, which depends on its amino acid composition but not its primary sequence or chirality. In addition to HCV, C5A inhibits infection by selected flaviviruses, paramyxoviruses, and HIV. These results suggest a model in which C5A destabilizes viral membranes based on their lipid composition, offering a unique therapeutic approach to HCV and other viral infections.Entities:
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Year: 2008 PMID： 18287023 PMCID： PMC2268589 DOI： 10.1073/pnas.0712380105
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205