Screening on phloroglucinols of anti-influenza virus activity from Dryopteris crassirhizoma / 中草药

ABSTRACT

Objective To find the most active phloroglucinol compound on influenza virus from Dryopteris crassirhizoma. Methods Twenty-five phloroglucinols from D. crassirhizoma were docked into 12 kinds neuraminidase (NA) for molecular docking. The binding energies, the combination of compound and neuraminidase and the interaction with the important amino acid residues were used for virtual screening. The inhibitory effect in vitro of four candidate compounds on NA was tested by NA inhibition assay, on this basis, M22 was evaluated for its antiviral activity on MDCK cells via CPE assay. Results Virtual screening suggested that five candidates had strong binding abilities with NA. NA inhibition assay showed that M22 have the strongest activity against NA of all candidates. CPE assays demonstrated that M22 exhibited inhibitory activity on various influenza virus. Conclusion M22 from D. crassirhizoma have significant inhibitory efficacy on influenza virus. The results provide us with useful information for the development of novel anti-influenza drugs.