In vitro anti-viral activity of the total alkaloids from Tripterygium hypoglaucum against herpes simplex virus type 1

Autor: Ren-bin Qi, Lian-jun Wang, Wang Yifei, Chong-Ren Yang, Yun-xia Cui, Da-xiang Lu, Chuan-hai Zhang, Ying-Jun Zhang, Xiao-yi Wei, Zhe Ren
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Virologica Sinica
ISSN: 1995-820X
1674-0769
Popis: Herpes simplex virus type 1 (HSV-1) is a commonly occurring human pathogen worldwide. There is an urgent need to discover and develop new alternative agents for the management of HSV-1 infection. Tripterygium hypoglaucum (level) Hutch (Celastraceae) is a traditional Chinese medicine plant with many pharmacological activities such as anti-inflammation, anti-tumor and antifertility. The usual medicinal part is the roots which contain about a 1% yield of alkaloids. A crude total alkaloids extract was prepared from the roots of T. hypoglaucum amd its antiviral activity against HSV-1 in Vero cells was evaluated by cytopathic effect (CPE) assay, plaque reduction assay and by RT-PCR analysis. The alkaloids extract presented low cytotoxicity (CC(50) = 46.6 μg/mL) and potent CPE inhibition activity, the 50% inhibitory concentration (IC(50)) was 6.5 μg/mL, noticeably lower than that of Acyclovir (15.4 μg /mL). Plaque formation was significantly reduced by the alkaloids extract at concentrations of 6.25 μg/mL to 12.5 μg/mL, the plaque reduction ratio reached 55% to 75 which was 35% higher than that of Acyclovir at the same concentration. RT-PCR analysis showed that, the transcription of two important delayed early genes UL30 and UL39, and a late gene US6 of HSV-1 genome all were suppressed by the alkaloids extract, the expression inhibiting efficacy compared to the control was 74.6% (UL30), 70.9% (UL39) and 62.6% (US6) respectively at the working concentration of 12.5 μg/mL. The above results suggest a potent anti-HSV-1 activity of the alkaloids extract in vitro.
Databáze: OpenAIRE
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