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. 1982 Jan;21(1):66-73.
doi: 10.1128/AAC.21.1.66.

Inhibition of rotaviruses by selected antiviral substances: mechanisms of viral inhibition and in vivo activity

D F Smee, R W Sidwell, S M Clark, B B Barnett, R S Spendlove

Inhibition of rotaviruses by selected antiviral substances: mechanisms of viral inhibition and in vivo activity

D F Smee et al. Antimicrob Agents Chemother. 1982 Jan.

Abstract

Several RNA virus inhibitors were evaluated against simian (SA11) rotavirus infections in vitro and murine rotavirus gastroenteritis in vivo. Test compounds included 1-beta-D-ribofuranosyl-1,2,4-triazole-3-carboxamide (ribavirin), 3-deazaguanine (3-DG), 3-deazauridine, and 9-(S)-(2,3-dihydroxypropyl)adenine [(S)-DHPA]. All drugs inhibited total infectious SA11 virus yields in MA-104 cells. Ribavirin, 3-DG, and (S)-DHPA affected [3H]uridine uptake into uninfected MA-104 cells in both the acid-soluble and -insoluble fractions. All drugs reduced the levels of dense (precursor) and light (complete) SA11 particle yields compared with control but did not alter the relative amounts of dense compared with light particles, suggesting that the agents did not interfere with virus assembly. Ribavirin and 3-DG inhibited SA11 polypeptide synthesis, as determined by polyacrylamide gel electrophoresis studies. None of the agents or mono- and triphosphate derivatives of ribavirin inhibited SA11 RNA polymerase activity. In murine rotavirus studies, oral therapy with ribavirin-2',3',5'-triacetate and (S)-DHPA increased mean survival time, but no increase in survivor rate was observed. 3-DG- and (S)-DHPA-treated mice had a more rapid weight gain than controls, suggesting a probable lessening of the severity of the disease.

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