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- W11824792 abstract "We report on the antiviral potency of an aqueous extract of root/stem bark of Rhus aromatica (fragrant sumac extract) against herpes simplex virus type 1 and type 2 in cell culture (RC-37 cells) using a plaque reduction assay. The extract exhibited a high level of anti-HSV activity with IC50-values of 0.0005% for HSV-1 and 0.0043% for HSV-2 as well as high selectivity indices (SI) of 5400 for HSV-1 and 628 for HSV-2. In order to determine the mode of antiviral action, the fragrant sumac extract was added at different times to the cells or viruses during the viral infection cycle. At maximum non-cytotoxic concentration (0.25%), plaque formation was significantly reduced by more than 99% when herpes simplex viruses were pretreated with the plant extract for 1 h prior to cell infection. When the host cells were pretreated with the fragrant sumac extract for 1 h prior to virus infection, the infectivity of viruses was reduced by 50% for HSV-1 but only moderately for HSV-2. No antiviral effect was seen when the plant extract was added to already infected host cells. Based on these findings the plant extract seems to interact not only with the viral envelope but also with the surface of the host cells impairing the ability of herpes simplex viruses to adsorb to and penetrate into the host cells. In conclusion, the aqueous fragrant sumac extract revealed a strong antiviral activity against HSV-1 and HSV-2 in vitro." @default.
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- W11824792 date "2009-08-01" @default.
- W11824792 modified "2023-09-27" @default.
- W11824792 title "Antiviral activity of Rhus aromatica (fragrant sumac) extract against two types of herpes simplex viruses in cell culture." @default.
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