alexa In vitro anti-influenza virus activity of the pavine alkaloid (-)-thalimonine isolated from Thalictrum simplex L.


Journal of Antivirals & Antiretrovirals

Author(s): Serkedjieva J, Velcheva M

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Abstract The pavine alkaloid (-)-thalimonine (Thl), isolated from the Mongolian plant Thalictrum simplex inhibited markedly the reproduction of influenza virus A/Germany/27, str. Weybridge (H7N7) and A/Germany/34, str. Rostock (H7N1) in cell cultures of chicken embryo fibroblasts. In a number of assays at a non-toxic concentration range of 0.1-6.4 microM the alkaloid inhibited viral reproduction in a selective and specific way (selectivity index = 640, 106.6, respectively). Expression of viral glycoproteins haemagglutinin (HA), neuraminidase (NA) and nucleoprotein (NP) on the surface of infected cells, virus-induced cytopathic effect, infectious virus yields, HA production and virus-specific protein synthesis were all reduced. The inhibition was dose-related and depended on virus inoculum. The time of addition experiments indicated that viral reproduction was markedly inhibited when Thl was added at 4-5 h of infection. No inactivating effect on extracellular virus was found.
This article was published in Antivir Chem Chemother and referenced in Journal of Antivirals & Antiretrovirals

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