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• W3030895890 abstract "Objective To further investigate inhibitory mechanism(s) of resveratrol on varicellazoster virus (VZV) in vitro with our previously generated reporter cell line MV9G.Methods Cell-free VZVs were directly inoculated onto MV9G cells (CFVs direct-infection) or cell-associated VZVs were co-cultured with MV9G cells (CAVs co-culture) to activate expression of reporter gene firefly luciferase in MV9G cells.Resveratrol was added before or after virus infection,roles of resveratrol on direct inactivation,on viral attachment to and penetration into MV9G cells,on intracellular viral replication and its IC50,inhibitorytime points and reversibility were assayed by comparing the luciferase activities reduction by resveratrol.Thereductions of VZV IE62 mRNA copies and IE62-antibody positive cells by resveratrol were further assayed.Results ATPs contents of MV9G cells in the presence of resveratrol over 30.0 μg/ml were concentrationdependently reduced,the CD50 of which was around 60.3 μg/ml.CFVs were premixed with 25.0 μg/ml resveratrol and incubated at 37℃ waterbath for two hours and then directly inoculated onto MV9G cells,luciferases activated by resveratrol-treated CFVs were reduced to around half of the untreated controls.MV9G cells were pre-incubated with resveratrol at 37℃ for 2 h and then directly infected with CFVs at 37℃ for another 2 h,the CFVs-activated luciferase was concentration-dependently reduced,but no big change was observed in those pre-incubated at 4℃.MV9G cells were co-cultured with CAVs in the presence of resvertrolfor 72 h,the CAVs-activated luciferases were markedly reduced in a concentration-dependent manner,the IC50 of which was around 8.7 μgml.Resveratrol was added in CAVs co-culture at 1,3,6,9,12,24,30,and 36 h post infection,the CAVs-activated luciferase in those resveratrol was added at 3,6,9,12,and 24 h post infection were significantly higher than those of controls.Resveratrol was withdrawn from CAVs coculture media,the CAVs-activated luciferases after withdrawal were significantly higher than those before,especially in those withdrswn at 24 and 72 h post infection.The IE62 mRNA levels shown by cDNA copiesdetected with SYBR Green RT-PCR and IE62 positive cells shown by monoclonal anti-IE62 antibody of thevirus-infected cells treated with resveratrol were significantly reduced with increase of incubation time withresveratrol.Conclusion Resveratrol was cytotoxic to MV9G cells,and the maximum resistant concentrationon MV9G cells was around 30.0 μg/ml,the CD50 of which was around 60.3 μg/ml.Non-cytotoxic resveratrol partly inactivated CFVs,inhibited viral penetration into rather than attachment to MV9G cells.Resveratrol inhibited CAVs' intmcellular replication strongly but reversibly in a concentration-dependent manner,the IC50 of which was around 8.7 μ/ml.The inhibition of resveratrol on VZV in vitro might be through suppression of IE62 gene transcription and expression in the early stage of infection.Key words: Resveratrol; Antiviral; Varicella-zoster virus; Immediate early protein 62" @default.
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• W3030895890 date "2012-05-31" @default.
• W3030895890 modified "2023-09-28" @default.
• W3030895890 title "Investigation on inhibitory mechanisms of resveratrol on varicella-zoster virus in vitro" @default.
• W3030895890 doi "https://doi.org/10.3760/cma.j.issn.0254-5101.2012.05.009" @default.
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