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Antiviral activity of brincidofovir on parvovirus B19.

Abstract：

:Parvovirus B19 (B19V), a single-stranded DNA virus in the family Parvoviridae, is a human pathogenic virus responsible for a wide range of clinical manifestations. Currently there is no approved antiviral therapy for parvovirus infection. The acyclic nucleoside phosphonate cidofovir (CDV) has been demonstrated to inhibit replication of B19V in vitro. The aim of the present study was to evaluate whether brincidofovir (BCV), a novel lipid conjugate of CDV, could also inhibit B19V replication. Experiments were carried out in erythroid progenitor cells (EPCs) and UT7/EpoS1 cells, infected with B19V and cultured in the presence of different concentrations of BCV and CDV for comparison. The dynamics of viral replication was evaluated by a qPCR-based assay and the extent of inhibition of viral replication exerted by the compounds determined, along with the effect of the compounds on cell viability and cell proliferation rates. Results confirmed that BCV showed significantly higher antiviral activity against B19V compared to CDV in both cell-based systems. For BCV, the calculated EC50 values were in the range 6.6-14.3 μM in EPCs and 0.22-0.63 μM in UT7/EpoS1 cells. In comparison, the EC50 values for CDV were >300 μM in EPCs and 16.1 μM in UT7/EpoS1 cells. Concurrently, the effects on cell viability were observed at a much higher concentration of BCV, with calculated CC50 values in the range 93.4-102.9 μM in EPCs and 59.9-66.8 μM in UT7/Epos1. The antiviral activity was observed specifically with the metabolically active stereoisomer of BCV suggesting that CDV-diphosphate, the metabolite of both BCV and CDV, was the active antiviral. Our results support a selective role for BCV in the inhibition of B19 viral replication.

journal_name

Antiviral Res

journal_title

Antiviral research

authors

Bua G,Conti I,Manaresi E,Sethna P,Foster S,Bonvicini F,Gallinella G

doi

10.1016/j.antiviral.2018.12.003

subject

Has Abstract

pub_date

2019-02-01 00:00:00

pages

22-29

eissn

0166-3542

issn

1872-9096

pii

S0166-3542(18)30539-4

journal_volume

162

pub_type

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