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Abstract Title:

Inhibition of influenza virus replication by adlay tea.

Abstract Source:

J Sci Food Agric. 2018 Mar ;98(5):1899-1905. Epub 2017 Oct 12. PMID: 28902408

Abstract Author(s):

Emiko Nagai, Miwa Iwai, Ritsuko Koketsu, Riho Sogabe, Ryosuke Morimoto, Yuri Suzuki, Yoichiro Ohta, Yoshinobu Okuno, Atsushi Ohshima, Toshiki Enomoto, Yuji Isegawa

Article Affiliation:

Emiko Nagai

Abstract:

BACKGROUND: The present study was conducted aiming to examine the antiviral activity of adlay tea and its components against influenza viruses. We further aimed to clarify the mechanism by which these components regulate virus replication.

RESULTS: Adlay tea at a concentration suitable for drinking inhibited the multiplication of influenza viruses. Moreover, our results suggest that individual components of the tea had antiviral activities against the influenza A/PR/8/34 virus. Adlay tea inhibited multiplication of the H1N1, H3N2 and B types of influenza virus, including oseltamivir-resistant viruses. In addition, adlay tea inhibited influenza infection during the periods of virus adsorption to the cell and virus replication. Adlay tea did not suppress hemagglutination inhibition or cell fusion, although it slightly inhibited virus binding to Malin Darby canine kidney cells. Furthermore, our findings suggest that the antiviral compounds included in adlay tea were ingredients other than polyphenols and that there were several types of effective compounds in adlay tea inhibiting several steps of viral replication.

CONCLUSION: The results of the present study demonstrate that adlay tea had antiviral effects against influenza viruses. Our findings with respect to adlay tea suggest that the polyphenols might have a small influence on its antiviral activity and that other ingredients might have more influence.© 2017 Society of Chemical Industry.

Study Type : In Vitro Study

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