Irregular Terpenoids From the Medicinal Herb Gentianella pygmaea

Area of Science:

• Natural Product Chemistry
• Pharmacology

Background:

• Gentianella pygmaea is a medicinal herb.
• Terpenoids are a diverse class of natural products with various biological activities.

Purpose of the Study:

• To isolate and characterize new compounds from Gentianella pygmaea.
• To evaluate the anti-inflammatory potential of isolated compounds.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation via 1D and 2D NMR, HRMS, and quantum chemical calculations.
• In vitro anti-inflammatory assay using LPS-induced RAW264.7 macrophages.

Main Results:

• Three new irregular terpenoids, gentianellins A-C (1-3), and two known analogues (4-5) were identified.
• Compounds 1-3 exhibited moderate anti-inflammatory activity.
• Suppression of tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) secretion was observed.
• IC50 values ranged from 13.30 to 25.41 µM.

Conclusions:

• Gentianella pygmaea is a source of novel terpenoids.
• The new isolates possess moderate anti-inflammatory properties.
• Further investigation into the mechanism of action is warranted.