Antiviral activities against influenza virus (FM1) of bioactive fractions and representative compounds extracted from Banlangen (Radix Isatidis)

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• 作者：Xiao Ping^a ; Ye Weiyang^a ; Chen Jianwei^a ; Li Xiang^a ; ^{lixiang_8182@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Radix Isatidis ; Clemastanin B ; Goitrin ; Antiviral agents ; Orthomyxoviridae
• 刊名：Journal of Traditional Chinese Medicine
• 出版年：2016
• 出版时间：June 2016
• 年：2016
• 卷：36
• 期：3
• 页码：369-376
• 全文大小：2201 K

文摘

To study the antiviral activities of clemastanin B (CB), epigoitrin, phenylpropanoids portion (PEP) and the mixture of phenylpropanoids, alkaloids and organic acid fractions (PEP + ALK + OA) from Banlangen (Radix Isatidis).

Methods

The experiment consisted of four parts: therapeutic action, prophylaxsis action, inhibition of virus attachment, and direct virucidal action. Cytopathic effect (CPE) and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium (MTT) were used to assess antiviral activity.

Results

CB, epigoitrin, PEP and PEP + ALK + OA fractions from Banlangen (Radix Isatidis) extract significantly increased the viability of MDCK cells pre-infected with the virus compared with the virus control group in all the dilutions (P < 0.01). Pretreated with either pure compounds or chemical fractions of Banlangen (Radix Isatidis) extract in all the dilutions significantly improved the viability of MDCK cells (P < 0.01). The inhibition of virus absorption to the host cells by CB, epigoitrin and PEP was in a dose dependent manner.

Conclusion

CB, epigoitrin, PEP and PEP + ALK + OA exert their anti-influenza activity by inhibiting the virus multiplication, prophylaxsis and blocking the virus attachment. The primary mode of action of PEP and PEP + ALK + OA is the inhibition of virus replication. The inhibitory effects on virus attachment and multiplication are the main modes for epigoitrin.