Oleanane-type triterpenoid saponins from Lysimachia fortunei Maxim

Area of Science:

• Natural Products Chemistry
• Pharmacology
• Medicinal Chemistry

Background:

• Lysimachia fortunei is a plant source of bioactive compounds.
• Triterpenoid saponins are a class of natural products with diverse biological activities.
• Liver cancer remains a significant global health challenge, necessitating novel therapeutic agents.

Purpose of the Study:

• To isolate and characterize novel oleanane-type triterpenoid saponins from Lysimachia fortunei.
• To evaluate the cytotoxic activity of these isolated saponins against human liver cancer cell lines.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation via comprehensive spectroscopic analyses (1D, 2D-NMR, HRESIMS) and chemical methods.
• Cytotoxicity assays using SMMC-7721, Hep3B, HuH7, and SK-Hep-1 human liver cancer cell lines.

Main Results:

• Six new oleanane-type triterpenoid saponins, fortunosides A-F, were identified.
• Six known triterpenoid saponins were also isolated.
• Three saponins, featuring the protoprimulagenin A aglycone, demonstrated moderate cytotoxicity against all tested liver cancer cell lines.
• IC50 values ranged from 4.76 to 15.12 μM for the active compounds.

Conclusions:

• Lysimachia fortunei is a valuable source of structurally diverse oleanane-type triterpenoid saponins.
• The identified saponins, particularly those with the protoprimulagenin A aglycone, possess promising cytotoxic activity against human liver cancer cells.
• These findings suggest potential for developing novel anticancer therapeutics derived from this plant species.