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- W2116639780 abstract "A natural brassinosteroid and a series of synthetic derivatives were found to be good inhibitors of herpes simplex virus type 1 (HSV-1) and arenavirus replication in cell culture. The synthetic compounds tested were analogues of the 24(S) ethylbrassinone. Compounds (22R,23R,24S)-2α, 3α,5α,22,23-pentahydroxy-stigmastan-6-one and (22R,23R,24S)-3β-bromo-5α,22,23-trihydroxy stigmastan-6-one were cytotoxic at concentrations of 20–40 µM. (22S,23S,24S)-2α,3α,22,23-tetrahydroxy-5α,stigmastan-6-one, (22R,23R,24S)-3β-acetoxy-22,23-dihydroxy-5α-cholestan-6-one, (22S,23S,24S)-3β-bromo-22,23-dihydroxy-5α-cholestan-6-one and (22S,23S,24S)-3β-bromo-5α,22,23-trihydroxy-stigmastan-6-one were the most active of the series against HSV-1, with selectivity index (SI) values (CC 50 /EC 50 ) ranging from 10.6 to 16.5. The majority of the compounds were potent inhibitors of arenaviruses, (22S,23S,24S)-3β-bromo-5α,22,23-trihydroxy-stigmastan-6-one being the most active, with SI values of 307.8 and 692.5 for Tacaribe and Junin viruses, respectively. The antiviral activity of brassinosteroid derivatives was not because of direct inactivation; time-of-addition experiments suggested that a late step in HSV-1 multiplication was affected, whereas arenaviruses remained susceptible to the compounds throughout the replicative cycle." @default.
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- W2116639780 date "2000-02-01" @default.
- W2116639780 modified "2023-10-04" @default.
- W2116639780 title "Antiviral Effect of Brassinosteroids against Herpes Virus and Arenaviruses" @default.
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- W2116639780 doi "https://doi.org/10.1177/095632020001100107" @default.
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