The goal of this Center for Excellence in Translational Research is to develop small molecule inhibitors of enveloped virus entry and test their efficacy in animal models of disease. The underlying hypothesis is that enveloped viral entry is replete with therapeutic targets to which small molecule inhibitors can be developed, blocking receptor engagement, membrane fusion, and cellular trafficking. Most classes of licensed antiviral drugs block intracellular steps of the replication cycle, often through interfering with virally encoded enzymes required for replication. A handful of antiviral agents block enveloped virus entry: maraviroc, a small molecule that blocks engagement of the CCR5 co-receptor by gp120 of human immunodeficiency virus-1;enfuvirtide, a synthetic peptide that binds gp41 of HIV1 and interferes with fusion;and amantadine/rimantidine, which blocks the M2 ion channel of certain strains of influenza A virus to prevent release of the viral ribonucleoprotein segments into the cell. That paucity of synthetic entry inhibitors starkly contrasts with the natural protection mechanism of neutralizing antibodies that frequently block viral entry. This CETR will advance two general approaches to small molecule inhibition of viral entry: direct targeting of viral envelope proteins;and specific targeting of cellular factors requisite for infectious virus entry. Targeting envelope proteins has the advantage that the small molecules do not need to enter cells, thus eliminating uptake and potential export concerns, and such inhibitors may be less likely to have unwanted interactions with cellular proteins. Targeting cellular proteins offers the attractive though unproven possibility to inhibit the entry of multiple viruses with a single small molecule. A team of 6 investigators working on interdependent projects will discover and advance small molecule inhibitors of both categories.
Both flaviviruses and filoviruses are serious pathogens with critical unmet clinical needs. Flaviviruses, including dengue virus, West Nile virus, and yellow fever virus, are widespread arthropod-transmitted human pathogens. Approximately 100 million people are infected with dengue alone each year. Although the filoviruses such as Ebola virus and Marburg virus are not as widespread as the flaviviruses, case fatality rates can approach 90%. This program seeks to identify new candidate therapeutic compounds to address these important human pathogens.
|Chou, Yi-ying; Cuevas, Christian; Carocci, Margot et al. (2016) Identification and Characterization of a Novel Broad-Spectrum Virus Entry Inhibitor. J Virol 90:4494-510|
|Robinson, Lindsey R; Whelan, Sean P J (2016) Infectious Entry Pathway Mediated by the Human Endogenous Retrovirus K Envelope Protein. J Virol 90:3640-9|
|Piccinotti, Silvia; Whelan, Sean P J (2016) Rabies Internalizes into Primary Peripheral Neurons via Clathrin Coated Pits and Requires Fusion at the Cell Body. PLoS Pathog 12:e1005753|
|Clark, Margaret J; Miduturu, Chandra; Schmidt, Aaron G et al. (2016) GNF-2 Inhibits Dengue Virus by Targeting Abl Kinases and the Viral E Protein. Cell Chem Biol 23:443-52|
|Taylor, Travis J; Diaz, Fernando; Colgrove, Robert C et al. (2016) Production of immunogenic West Nile virus-like particles using a herpes simplex virus 1 recombinant vector. Virology 496:186-93|
|Chou, Yi-Ying; Krupp, Annabel; Kaynor, Campbell et al. (2016) Inhibition of JCPyV infection mediated by targeted viral genome editing using CRISPR/Cas9. Sci Rep 6:36921|
|de Wispelaere, MÃ©lissanne; Khou, CÃ©cile; Frenkiel, Marie-Pascale et al. (2015) A Single Amino Acid Substitution in the M Protein Attenuates Japanese Encephalitis Virus in Mammalian Hosts. J Virol 90:2676-89|
|Gaudin, RaphaÃ«l; Kirchhausen, Tomas (2015) Superinfection exclusion is absent during acute Junin virus infection of Vero and A549 cells. Sci Rep 5:15990|
|Carocci, Margot; Hinshaw, Stephen M; Rodgers, Mary A et al. (2015) The bioactive lipid 4-hydroxyphenyl retinamide inhibits flavivirus replication. Antimicrob Agents Chemother 59:85-95|
|Harrison, Stephen C (2015) Viral membrane fusion. Virology 479-480:498-507|
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