Novel isoflavone glucosides in groundnut (Apios americana medik) and their antiandrogenic activities

Marina Ichige, Erina Fukuda, Saki Miida, Jun Ichiro Hattan, Norihiko Misawa, Shun Saito, Takahiro Fujimaki, Masaya Imoto, Kazutoshi Shindo

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Isoflavone glucosides (2′-hydroxy,5-methoxy genistein-7-O-glucoside (1), 2′-hydroxy genistein-7-O-gentibioside (2), 5-methoxy genistein-7-O-glucoside (3), 3′,5-dimethoxy genistein-7-O-glucoside (4), 2′-hydroxy genistein-7-O-glucoside (5), genistein-7-O-gentibioside (6), 2′-hydroxy,5-methoxy genistein-4′,7-O-diglucoside (7), and 2′-hydroxy genistein-4′,7-O-diglucoside (8)) were isolated from the groundnut of Apios americana Medik. Their structures were elucidated on the basis of HR-ESI-MS and 1D- and 2D-NMR analyses. Compounds 1, 2, 4, and 7 are new compounds presented here for the first time. Compounds 2 and 5 were proven to be androgen receptor antagonists due to their binding activities for androgen receptors (IC50 280 and 160 μM, respectively) and the inhibitory activity of androgen-induced expression of prostate-specific antigen (PSA) mRNA in LNCaP (prostate adenocarcinoma) cells (IC50 20 and 18 μM, respectively).

Original languageEnglish
Pages (from-to)2183-2187
Number of pages5
JournalJournal of agricultural and food chemistry
Issue number9
Publication statusPublished - 2013 Mar 6


  • Apios americana Medik
  • LNCaP human prostate adenocarcinoma cells
  • antiandrogenic activity
  • isoflavone glucosides

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)


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