A comparative study on hulled adlay and unhulled adlay through evaluation of their LPS-induced anti-inflammatory effects, and isolation of pure compounds

Goeun Choi, Ah Reum Han, Joo Hee Lee, Ji Youn Park, Unwoo Kang, Jongki Hong, Yeong Shik Kim, Eun Kyoung Seo

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Coicis semen (=the hulled seed of Coix lacryma-jobi L. var. ma-yuen (Rom.Caill.) Stapf; Gramineae), commonly known as adlay and Job's tears, is widely used in traditional medicine and as a nutritious food. Bioassay-guided fractionation of the AcOEt fraction of unhulled adlays, using measurement of nitric oxide (NO) production on lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cells, led to the isolation and identification of two new stereoisomers, (+)-(7′S,8′R,7″S,8″R)-guaiacylglycerol β-O-4′-dihydrodisinapyl ether (1) and (+)-(7′S,8′R,7″R,8″R)-guaiacylglycerol β-O-4′-dihydrodisinapyl ether (2), together with six known compounds, 3-8. Compounds 3 and 4 exhibited inhibitory activities on LPS-induced NO production with IC50 values of 1.4 and 3.7 μM, respectively, and suppressed inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) protein expressions in RAW 264.7 macrophage cells. Simple high-performance liquid chromatography with ultraviolet detection (HPLC/UV) was used to compare the AcOEt fraction of unhulled adlays responsible for the anti-inflammatory activity in RAW 264.7 cells and the inactive AcOEt fraction of hulled adlays.

Original languageEnglish
Pages (from-to)380-387
Number of pages8
JournalChemistry and Biodiversity
Volume12
Issue number3
DOIs
StatePublished - Mar 2015

Keywords

  • Coix lacryma-jobi
  • Cyclooxygenase-2 (COX-2)
  • Inducible nitric oxide synthase (iNOS)
  • Phenolic compounds

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