Fig. 2From: Characterization and mechanisms of anti-influenza virus metabolites isolated from the Vietnamese medicinal plant Polygonum chinense Dose response curves of PC1 to PC3 and PC5 to PC8 isolated from P. chinense against PR8, HK and Lee and the MDCK host cell line. Cell monolayers were mock-infected or infected with influenza A and B viruses at a MOI of 0.001 for 1 h. After washing with PBS, compounds serially diluted in MEM with 2 μg/mL TPCK-trypsin were added to the wells and incubated for 3 days. Cell viability was measured by MTT assay. RBV was used as a positive control. The values are means ± standard deviation (SD) from three replicatesBack to article page