Neuraminidase Inhibitors from the Fermentation Broth of Phellinus linteus
2014
Hwang, B.S., Chonbuk National University, Iksan, Republic of Korea | Lee, M.S., Chonbuk National University, Iksan, Republic of Korea | Lee, S.W., Chonbuk National University, Iksan, Republic of Korea | Lee, I.K., Chonbuk National University, Iksan, Republic of Korea | Seo, G.S., Korea National College of Agriculture and Fisheries, Hwaseong, Republic of Korea | Choi, H.J., Kwangju Womens University, Gwangju, Republic of Korea | Yun, B.S., Chonbuk National University, Iksan, Republic of Korea
During a search for neuraminidase inhibitors derived from medicinal fungi, we found that the fermentation broth of Phellinus linteus exhibited potent neuraminidase inhibitory activity. Through bioassay-guided fractionation, two active compounds were purified from the ethyl acetate-soluble portion of the fermentation broth of P. linteus. These structures were identified as inotilone (1) and 4-(3,4-dihydroxyphenyl)-3-buten-2-one (2) by spectroscopic methods. Compounds 1 and 2 inhibited H1N1 neuraminidase activity with IC¡�50 values of 29.1 and 125.6 ¥�M, respectively, in a dose-dependent manner. They also exhibited an antiviral effect in a viral cytopathic effect reduction assay using MDCK cells. These results suggest that compounds 1 and 2 from the culture broth of P. linteus would be good candidates for the prevention and therapeutic strategies towards viral infections.
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