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Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
Published on: August 14, 2019
[Flavonoids from Scutellaria baicalensis and their bioactivities].
Xi Qin Zhou1, Hong Liang, Xin Hua Lu
1State Key Laboratory of Natural and Biomimetic Drugs, Peking University School of Pharmaceutical Sciences, Beijing 100191, China.
Summary
This study isolated nine flavonoids from Scutellaria baicalensis, with baicalein showing significant antibacterial activity. Some compounds also inhibited the interleukin-1 beta converting enzyme, suggesting therapeutic potential.
Area of Science:
- Phytochemistry
- Pharmacology
- Natural Products Chemistry
Background:
- Scutellaria baicalensis is a traditional medicinal herb.
- Flavonoids are a class of plant secondary metabolites with diverse biological activities.
Purpose of the Study:
- To isolate and identify flavonoids from Scutellaria baicalensis.
- To evaluate the bioactivities of the isolated flavonoids in vitro.
Main Methods:
- Compounds were separated using chromatographic techniques.
- Structures were elucidated using spectral methods, including 2D Nuclear Magnetic Resonance (NMR).
- Bioactivities were screened using various in vitro models.
Main Results:
- Nine compounds were isolated and identified: baicalein, wogonin, oroxylin A, 5,7,2',6'-tetrahydroxyflavone, viscidulin III, baicalin, wogonoside, oroxylin A-7-O-beta-D-glucuronide, and chrysin-6-C-alpha-L-arabinopyranosyl-8-C-beta-D-glucopyranoside.
- Baicalein exhibited notable antibacterial activity.
- Several compounds demonstrated inhibitory effects against the interleukin-1 beta converting enzyme.
Conclusions:
- The isolated flavonoids possess significant bioactivities.
- Baicalein is a promising antibacterial agent.
- The study contributes to understanding the pharmacological potential of Scutellaria baicalensis flavonoids.
