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Erschienen in:

11.11.2022 | Note

Anti-influenza A virus activity of flavonoids in vitro: a structure–activity relationship

verfasst von: Ryosuke Morimoto, Akari Hanada, Chiaki Matsubara, Yuka Horio, Hidenobu Sumitani, Tokutaro Ogata, Yuji Isegawa

Erschienen in: Journal of Natural Medicines | Ausgabe 1/2023

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Abstract

Secondary plant metabolites from food extracts, namely daidzein, quercetin, and luteolin, exhibit anti-influenza virus effects, with IC50 values of 143.6, 274.8, and 8.0 μM, respectively. The activities of these metabolites differ depending on the functional groups. Therefore, in this study, we focused on members of the flavonoid group, and investigated the anti-influenza viral effects of different flavonoid classes (flavone, isoflavone, flavonol, flavanone, and flavan-3-ol) in vitro. The IC50 values were 4.9–82.8 μM, 143.6 μM, 62.9–477.8 μM, 290.4–881.1 μM, and 22.9–6717.2 μM, respectively, confirming their activity. The modifying group factors (number, position, type) in the flavonoid skeleton may be significantly related to the anti-influenza virus activity. Moreover, time-of-addition assay revealed that the mechanism of inhibition varied for the different classes; for example, flavonoids that inhibit virus adsorption or the early stage of viral growth. Interestingly, all the examined flavonoids inhibited the late stages of viral growth, suggesting that flavonoids mainly inhibit the late events in viral growth before the release of viral particles. Additionally, apigenin might be effective against oseltamivir-resistant strains. Our results may be important in the development of anti-influenza virus therapeutic strategies in the future.

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Metadaten
Titel
Anti-influenza A virus activity of flavonoids in vitro: a structure–activity relationship
verfasst von
Ryosuke Morimoto
Akari Hanada
Chiaki Matsubara
Yuka Horio
Hidenobu Sumitani
Tokutaro Ogata
Yuji Isegawa
Publikationsdatum
11.11.2022
Verlag
Springer Nature Singapore
Erschienen in
Journal of Natural Medicines / Ausgabe 1/2023
Print ISSN: 1340-3443
Elektronische ISSN: 1861-0293
DOI
https://doi.org/10.1007/s11418-022-01660-z