Collagenase inhibitors from Viola yedoensis

Naohiro Oshima, Yuji Narukawa, Tadahiro Takeda, Fumiyuki Kiuchi

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Fractionation of acetone and methanol extracts of Viola yedoensis, under the guidance of inhibition against Clostridium histolyticum collagenase (ChC), resulted in the isolation of esculetin (1) (IC50 12 μM) and scopoletin (2) (IC50 1.8 μM) as the active constituents, together with trans-p-coumaric acid (3), cis-p-coumaric acid (4), 3-O-β-d-glucosyl- 7-O-α-L-rhamnosylkaempferol (5), rutin (6), isovitexin (7), isoorientin (8), vicenin-2 (9), isoscoparin (10), vanillic acid (11) and adenosine (12). Modification of phenolic hydroxy groups of 1 showed that small O-alkyl groups largely increased the activity, whereas larger O-alkyl groups decreased the activity, and 6,7-dimethoxycoumarin (scoparone 13) potently inhibited ChC (IC50 24 nM).

Original languageEnglish
Pages (from-to)240-245
Number of pages6
JournalJournal of Natural Medicines
Issue number1
Publication statusPublished - 2013 Jan
Externally publishedYes


  • Anti-inflammatory
  • Collagenase
  • Coumarin
  • Inhibitor
  • Viola yedoensis

ASJC Scopus subject areas

  • Molecular Medicine


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