Chalcones as novel influenza A (H1N1) neuraminidase inhibitors from Glycyrrhiza inflata

Trong Tuan Dao, Phi Hung Nguyen, Hong Sik Lee, Eunhee Kim, Junsoo Park, Seong Il Lim, Won Keun Oh

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69 Citations (Scopus)


The emergence of highly pathogenic influenza A virus strains, such as the new H1N1 swine influenza (novel influenza), represents a serious threat to global human health. During our course of an anti-influenza screening program on natural products, one new licochalcone G (1) and seven known (2-8) chalcones were isolated as active principles from the acetone extract of Glycyrrhiza inflata. Compounds 3 and 6 without prenyl group showed strong inhibitory effects on various neuraminidases from influenza viral strains, H1N1, H9N2, novel H1N1 (WT), and oseltamivir-resistant novel H1N1 (H274Y) expressed in 293T cells. In addition, the efficacy of oseltamivir with the presence of compound 3 (5 μM) was increased against H274Y neuraminidase. This evidence of synergistic effect makes this inhibitor to have a potential possibility for control of pandemic infection by oseltamivir-resistant influenza virus.

Original languageEnglish
Pages (from-to)294-298
Number of pages5
JournalBioorganic and Medicinal Chemistry Letters
Issue number1
Publication statusPublished - 2011 Jan 1

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmaceutical Science
  • Drug Discovery
  • Clinical Biochemistry
  • Organic Chemistry

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