Microbial transformation of isosteviol oxime and the inhibitory effects on NF-κB and AP-1 activation in LPS-stimulated macrophages

Shwu Fen Chang, Bo Hon Chou, Li Ming Yang, Feng Lin Hsu, Wen Kuang Lin, Yi Ho, Shwu Jiuan Lin

研究成果: 雜誌貢獻文章同行評審

21 引文 斯高帕斯(Scopus)

摘要

Microbial transformation of isosteviol oxime (ent-16-E-hydroxyiminobeyeran-19-oic acid) (2) with Aspergillus niger BCRC 32720 and Absidia pseudocylindrospora ATCC 24169 yielded several compounds. In addition to bioconverting the d-ring to lactone and lactam moieties, 4α-carboxy-13α-hydroxy-13,16-seco-ent-19-norbeyeran-16-oic acid 13,16-lactone (7) and 4α-carboxy-13α-amino-13,16-seco-ent-19-norbeyeran-16-oic acid 13,16-lactam (10), one known compound, ent-1β,7α-dihydroxy-16-oxo-beyeran-19-oic acid (6), and five new compounds, ent-7α-hydroxy-16-E-hydroxyiminobeyeran-19-oic acid (3), ent-1β,7α-dihydroxy-16-E-hydroxyiminobeyeran-19-oic acid (4), ent-1β-hydroxy-16-E-hydroxyiminobeyeran-19-oic acid (5), ent-8β-cyanomethyl-13-methyl-12-podocarpen-19-oic acid (8), and ent-8β-cyanomethyl-13-methyl-13-podocarpen-19-oic acid (9), were isolated from the microbial transformation of 2. Elucidation of the structures of these isolated compounds was primarily based on 1D and 2D NMR, and HRESIMS data, and 3-5 were further confirmed by X-ray crystallographic analyses. Additionally, the inhibitory effects of all of these compounds were evaluated on NF-κB and AP-1 activation in LPS-stimulated RAW 264.7 macrophages. Among the compounds tested, 5 and 10 significantly inhibited NF-κB activation, with 5 showing equal potency to dexamethasone; 3 and 6-9 significantly inhibited AP-1 activation, particularly 8, which showed more inhibitory activity than dexamethasone.
原文英語
頁(從 - 到)6348-6353
頁數6
期刊Bioorganic and Medicinal Chemistry
17
發行號17
DOIs
出版狀態已發佈 - 九月 1 2009

Keywords

  • AP-1
  • Diterpenoid
  • Isosteviol oxime
  • Microbial transformation
  • NF-κB

ASJC Scopus subject areas

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

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