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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
Anti-allergic flavones from Arthraxon hispidus
Gui-Hua Quan1, Hee-Sung Chae, Hyuk Hwan Song
1Central Research Laboratory, The Second Clinical Hospital of Jilin University.
Chemical & Pharmaceutical Bulletin
|September 3, 2013
Summary
Researchers isolated new flavones from Arthraxon hispidus, finding that compounds 2 and 3 inhibit interleukin-6 release. Compound 2 also reduced prostaglandin D2 and leukotriene C4 release from mast cells.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Immunology
Background:
- Arthraxon hispidus is a plant with potential medicinal properties.
- Mast cells play a crucial role in allergic and inflammatory responses through the release of mediators like interleukin-6.
Purpose of the Study:
- To isolate and characterize bioactive compounds from Arthraxon hispidus.
- To evaluate the inhibitory effects of isolated compounds on inflammatory mediator release from mast cells.
Main Methods:
- Bioactivity-guided fractionation of Arthraxon hispidus extract.
- Isolation and structural elucidation of compounds using NMR spectroscopy.
- In vitro assay using bone marrow-derived mast cells (BMMC) to measure interleukin-6, prostaglandin D2, and leukotriene C4 release.
Main Results:
- Six new flavones and nine known compounds were isolated.
- Compounds 2 (luteolin 8-acetic acid methyl ester) and 3 (7-methyl-luteolin 8-C-β-(6-deoxyxylo-3-uloside)) inhibited interleukin-6 release.
- Compound 2 also inhibited prostaglandin D2, leukotriene C4, and β-hexosaminidase release.
Conclusions:
- Arthraxon hispidus contains novel flavones with anti-inflammatory potential.
- Specific compounds, particularly luteolin 8-acetic acid methyl ester, demonstrate significant inhibitory effects on key inflammatory mediators released by mast cells.
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