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- W2056522701 abstract "A novel nucleoside analog, 4(5H)-oxo-1-beta-D- ribofuranosylpyrazolo[3,4-d]pyrimidine-3-thiocarboxamide (N10169), was evaluated in cell culture and in animals for antiviral activity against DNA and RNA viruses. The compound was highly active against strains of adeno-, vaccinia, influenza B, paramyxo-, picorna-, and reoviruses, with 50% inhibition of virus-induced cytopathology at 1 to 10 microM. Lesser or no antiviral effects were observed against herpes simplex, cytomegalo-, corona-, influenza A, vesicular stomatitis, and visna viruses. Drug potency against certain viruses was highly cell line dependent (N10169 was highly active in HeLa cells but was much less potent in Vero cells). This was correlated, in part, to differences in levels of adenosine kinase activity in these cell lines, since adenosine kinase appears to phosphorylate N10169 to its active form. N10169 was inhibitory to proliferating cells at antiviral concentrations, whereas stationary-phase monolayers tolerated higher concentrations (less than or equal to 100 microM). Exogenous uridine was able to reverse the virus-inhibitory effects of the compound, leading to the discovery that N10169 5'-monophosphate is a potent inhibitor of cellular orotidylate decarboxylase. N10169 was evaluated in mice that were infected intraperitoneally with banzi virus or inoculated intranasally with influenza B virus, and in hamsters that were infected intranasally with vaccinia virus. In each model, intraperitoneal injection of N10169 (100 to 300 mg/kg per day for 7 days) twice daily was ineffective, whereas intraperitoneal injection of ribavirin showed some benefit in the influenza B and banzi virus infection models." @default.
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- W2056522701 date "1987-10-01" @default.
- W2056522701 modified "2023-10-06" @default.
- W2056522701 title "Novel pyrazolo[3,4-d]pyrimidine nucleoside analog with broad-spectrum antiviral activity" @default.
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- W2056522701 doi "https://doi.org/10.1128/aac.31.10.1535" @default.
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