Abstract
This study is to establish a cell-based model targeting to neuraminidase (NA) of the 2009 H1N1 influenza A virus. NA is an influenza virus structural protein with enzymatic activity of the cleavage of HA-sialic acid interaction to release new viral particles from cells. A model of HIV-1 (pNL4-3.Luc.R(-)E(-)) based pseudovirions packed with HA [hemagglutinin, A/VietNam/1203/2004 (H5N1)] and NA [A/California/04/2009 (H1N1)] was established to evaluate compounds activities on NA function. The viral release can be blocked by neuraminidase inhibitors, oseltamivir and oseltamivir carboxylate, with IC50 of (61 +/- 31) nmol L(-1) and (5.5 +/- 2.9) nmol L(-1) respectively. A point mutation of H275Y on NA leads oseltamivir-resistance. This corresponding mutation was introduced into the system which was also confirmed by oseltamivir and oseltamivir carboxylate.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Cell Line, Tumor
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Drug Resistance, Viral / genetics
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Enzyme Inhibitors / pharmacology
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HEK293 Cells
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HIV-1 / genetics
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Hemagglutinin Glycoproteins, Influenza Virus / genetics
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Hemagglutinin Glycoproteins, Influenza Virus / metabolism
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Humans
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Influenza A Virus, H1N1 Subtype / drug effects*
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Influenza A Virus, H1N1 Subtype / genetics
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Influenza A Virus, H1N1 Subtype / metabolism
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Influenza A Virus, H5N1 Subtype / drug effects*
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Influenza A Virus, H5N1 Subtype / genetics
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Influenza A Virus, H5N1 Subtype / metabolism
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Mutation
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Neuraminidase / antagonists & inhibitors*
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Neuraminidase / genetics
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Neuraminidase / metabolism
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Oseltamivir / analogs & derivatives*
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Oseltamivir / pharmacology*
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Plasmids
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Transfection
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Virus Internalization
Substances
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Enzyme Inhibitors
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Hemagglutinin Glycoproteins, Influenza Virus
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Oseltamivir
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Neuraminidase
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oseltamivir carboxylate