title: 5'-Silylated 3'-1,2,3-triazolyl Thymidine Analogues as Inhibitors of West Nile Virus and Dengue Virus.
abstract: West Nile virus (WNV) and Dengue virus (DENV) are important human pathogens for which there are presently no vaccine or specific antivirals. We report herein a 5'-silylated nucleoside scaffold derived from 3'-azidothymidine (AZT) consistently and selectively inhibiting WNV and DENV at low micromolar concentrations. Further synthesis of various triazole bioisosteres demonstrated clear structure-activity relationships (SARs) in which the antiviral activity against WNV and DENV hinges largely on both the 5'-silyl group and the substituent of 3'-triazole or its bioisosteres. Particularly interesting is the 5' silyl group which turns on the antiviral activity against WNV and DENV while abrogating the previously reported antiviral potency against human immunodeficiency virus (HIV-1). The antiviral activity was confirmed through a plaque assay where viral titer reduction was observed in the presence of selected compounds. Molecular modeling and competitive S-adenosyl-l-methionine (SAM) binding assay suggest that these compounds likely confer antiviral activity via binding to methyltransferase (MTase).
authors.affiliation: †Center for Drug Design, Academic Health Center, University of Minnesota, Minneapolis, Minnesota 55455, United States.
authors.forename: Sanjeev Kumar V
authors.initials: SK
authors.lastname: Vernekar
authors.affiliation: †Center for Drug Design, Academic Health Center, University of Minnesota, Minneapolis, Minnesota 55455, United States.
authors.forename: Li
authors.initials: L
authors.lastname: Qiu
authors.affiliation: ‡Wadsworth Center, New York State Department of Health, 120 New Scotland Ave., Albany, New York 12208, United States.
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.affiliation: †Center for Drug Design, Academic Health Center, University of Minnesota, Minneapolis, Minnesota 55455, United States.
authors.forename: Jayakanth
authors.initials: J
authors.lastname: Kankanala
authors.affiliation: ‡Wadsworth Center, New York State Department of Health, 120 New Scotland Ave., Albany, New York 12208, United States.|§Department of Biomedical Sciences, School of Public Health, University at Albany, Albany, New York 12201, United States.
authors.forename: Hongmin
authors.initials: H
authors.lastname: Li
authors.affiliation: †Center for Drug Design, Academic Health Center, University of Minnesota, Minneapolis, Minnesota 55455, United States.
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Geraghty
authors.affiliation: †Center for Drug Design, Academic Health Center, University of Minnesota, Minneapolis, Minnesota 55455, United States.
authors.forename: Zhengqiang
authors.initials: Z
authors.lastname: Wang
mesh_terms: D000998:Antiviral Agents / Q000737:chemistry* / Q000494:pharmacology; D001667:Binding, Competitive; D003716:Dengue Virus / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D015497:HIV-1 / Q000187:drug effects; D008780:Methyltransferases / Q000737:chemistry; D062105:Molecular Docking Simulation; D012436:S-Adenosylmethionine / Q000737:chemistry; D012821:Silanes / Q000737:chemistry* / Q000494:pharmacology; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D014230:Triazoles / Q000737:chemistry* / Q000494:pharmacology; D014902:West Nile virus / Q000187:drug effects*; D015215:Zidovudine / Q000031:analogs & derivatives* / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000998:Antiviral Agents; D012821:Silanes; D014230:Triazoles; D015215:Zidovudine; D012436:S-Adenosylmethionine; D008780:Methyltransferases