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• W3015543438 abstract "ABSTRACT Monophosphate prodrug analogs of 2’-deoxy-2’-fluoro-2’- C -methylguanosine have been reported as potent inhibitors of hepatitis C virus (HCV) RNA-dependent RNA polymerase. These prodrugs also display potent anti-dengue activities in cellular assays although their prodrug moieties were designed to produce high levels of triphosphate in the liver. Since peripheral blood mononuclear cells (PBMCs) are one of the major targets of dengue virus, different prodrug moieties were designed to effectively deliver 2’-deoxy-2’-fluoro-2’- C -methylguanosine monophosphate prodrugs and their corresponding triphosphates into PBMCs after oral administration. We identified a cyclic phosphoramidate prodrug 17 demonstrating a well-balanced anti-dengue cellular activity and in vitro stability profiles. In dogs, oral administration of 17 resulted in high PBMC triphosphate level, exceeding TP 50 (the intracellular triphosphate concentration at which 50% of virus replication is inhibited) at 10 mg/kg. Compound 17 demonstrated 1.6- and 2.2 log viremia reduction in the dengue mouse model at 100 and 300 mg/kg twice daily, respectively. At 100 mg/kg twice daily, the terminal triphosphate concentration in PBMCs reached above TP 50 , defining for the first time the minimum efficacious dose for a nucleos(t)ide prodrug. In the two-week dog toxicity studies at 30 to 300 mg/kg/day, no observed adverse effect level (NOAEL) could not be achieved due to pulmonary inflammation and hemorrhage. The preclinical safety results suspended further development of 17 . Nevertheless, present work has proven the concept that an efficacious monophosphate nucleoside prodrug could be developed for the potential treatment of dengue infection." @default.
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• W3015543438 date "2020-04-14" @default.
• W3015543438 modified "2023-10-18" @default.
• W3015543438 title "A Cyclic Phosphoramidate Prodrug of 2’-deoxy-2’-fluoro-2’-C-methylguanosine for the Treatment of Dengue Infection" @default.
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• W3015543438 doi "https://doi.org/10.1101/2020.04.13.040287" @default.
• W3015543438 hasPublicationYear "2020" @default.
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