Abstract
We synthesized new tropolone derivatives substituted with cyclic amines: piperidine, piperazine or pyrrolidine. The most active anti-helicase compound (IC50=3.4 microM), 3,5,7-tri[(4'-methylpiperazin-1'-yl)methyl]tropolone (2), inhibited RNA replication by 50% at 46.9 microM (EC50) and exhibited the lowest cytotoxicity (CC50)>1 mM resulting in a selectivity index (SI=CC50/EC50)>21. The most efficient replication inhibitor, 3,5,7-tri[(4'-methylpiperidin-1'-yl)methyl]tropolone (6), inhibited RNA replication with an EC50 of 32.0 microM and a SI value of 17.4, whereas 3,5,7-tri[(3'-methylpiperidin-1'-yl)methyl]tropolone (7) exhibited a slightly lower activity with an EC50 of 35.6 microM and a SI of 9.8.
Copyright (c) 2010 Elsevier Ltd. All rights reserved.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Antiviral Agents / chemical synthesis
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Antiviral Agents / chemistry*
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Antiviral Agents / pharmacology*
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Cell Line, Tumor
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DNA Helicases / antagonists & inhibitors
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DNA Helicases / chemistry
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DNA Helicases / metabolism*
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Drug Synergism
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Hepacivirus / drug effects*
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Hepacivirus / enzymology
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Hepatitis C / drug therapy
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Humans
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Interferon-gamma / pharmacology
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Models, Molecular
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Mutation
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RNA Helicases / antagonists & inhibitors
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RNA Helicases / chemistry
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RNA Helicases / metabolism
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RNA, Viral / antagonists & inhibitors
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RNA, Viral / metabolism
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Ribavirin / pharmacology
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Tropolone / analogs & derivatives*
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Tropolone / chemical synthesis
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Tropolone / pharmacology*
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Viral Nonstructural Proteins / antagonists & inhibitors
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Viral Nonstructural Proteins / chemistry
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Viral Nonstructural Proteins / metabolism
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Virus Replication / drug effects*
Substances
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Antiviral Agents
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RNA, Viral
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Viral Nonstructural Proteins
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Ribavirin
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Tropolone
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Interferon-gamma
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DNA Helicases
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RNA Helicases