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Diterpenoids as potential anti-inflammatory agents from Ajuga pantantha
Wenpei Liu1, Ziteng Song2, Huimei Wang1
1State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Tianjin Key Laboratory of Molecular Drug Research, and Drug Discovery Center for Infectious Disease, Nankai University, Tianjin 300350, China.
Bioorganic Chemistry
|June 8, 2020
Summary
Researchers discovered five new neo-clerodane diterpenoids from Ajuga pantantha. Two compounds inhibited nitric oxide production, with one showing anti-inflammatory effects in a zebrafish model.
Area of Science:
- Natural Product Chemistry
- Medicinal Chemistry
- Pharmacology
Background:
- Phytochemical surveys aim to identify bioactive compounds from plants.
- Diterpenoids are a diverse class of natural products with various biological activities.
- Inflammation is a complex biological response implicated in many diseases.
Purpose of the Study:
- To isolate and characterize new neo-clerodane diterpenoids from Ajuga pantantha.
- To evaluate the anti-inflammatory potential of the isolated compounds.
- To elucidate the mechanism of action of the most active compounds.
Main Methods:
- Phytochemical isolation and structure elucidation using NMR spectroscopy.
- Electronic circular dichroism (ECD) calculations for absolute configuration determination.
- In vitro nitric oxide (NO) inhibition assays, molecular docking, and Western blotting.
- In vivo anti-inflammatory testing in a zebrafish model.
Main Results:
- Five new neo-clerodane diterpenoids (compounds 1-5) were identified.
- Compounds 2 and 5 demonstrated significant inhibition of NO production (IC50 < 40 μM).
- Mechanistic studies suggested anti-inflammatory properties, with compound 5 showing efficacy in vivo.
Conclusions:
- Ajuga pantantha is a source of novel bioactive neo-clerodane diterpenoids.
- Compounds 2 and 5 possess anti-inflammatory properties, warranting further investigation.
- Compound 5 shows promise as a potential anti-inflammatory agent.
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