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Updated: Jun 20, 2026

Measuring Influenza Neutralizing Antibody Responses to A(H3N2) Viruses in Human Sera by Microneutralization Assays Using MDCK-SIAT1 Cells
Published on: November 22, 2017
Anti-influenza-virus activity of total alkaloids from Commelina communis L
Fei-Hong Bing1, Jun Liu, Zhi Li
1Key Laboratory of TCM Resource and Compound Prescription, Ministry of Education, Hubei College of Traditional Chinese Medicine, Wuhan, China. bingfeihong@126.com
Abstract:
The antiviral activity of total alkaloids from Commelina communis L. (TAC) against influenza virus A/PR/8/34 (H1N1) was investigated in vitro and in vivo. TAC exhibited an inhibitory action on the growth of influenza virus in Madin-Darby canine kidney cells when added before or after viral infection. In mice infected with influenza virus, orally administered TAC at 8, 16 or 32 mg/kg per day for 6 days significantly increased the survival rate, prolonged the mean survival time and reduced the viral titers in the lung and the lung index, compared with that of the untreated virus control. The results obtained suggest that TAC has a pronounced protective effect against infection by influenza A virus.

