In vitro anti-viral effect of fructopyrano-(1→4)-glucopyranose from Radix isatidis on infuenza virus A

To investigate the in vitro anti-viral effect of fructopyrano-(1→4)-glucopyranose (FG) from traditional Chinese medicine Radix isatidis, dog kidney cells (MDCK) were with treated with either FG and then with virus (Group A); virus and then with FG (Group B); or FG and virus simultaneous-ly (Group C). Results showed the in vitro cell protection rate and virus inhibition rate increased significantly with the increase of FG concentration when compared with cells without FG treatment (p