Two new triterpenoid saponins from Ilex cornuta

Area of Science:

• Natural Products Chemistry
• Pharmacology
• Cardiovascular Research

Background:

• Ilex cornuta is a plant species known to contain various bioactive compounds.
• Triterpenoid saponins are a class of natural products with diverse pharmacological properties.
• Cardiomyocyte injury models are crucial for understanding and treating heart diseases.

Purpose of the Study:

• To isolate and structurally elucidate new triterpenoid saponins from Ilex cornuta stems.
• To evaluate the potential cardioprotective effects of isolated compounds against hydrogen peroxide-induced injury in H9c2 cells.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structural determination through spectroscopic methods, including 1D/2D NMR and HR-ESI-MS.
• Assessment of cell-protective effects using an in vitro model of H9c2 cardiomyocyte injury induced by H2O2.

Main Results:

• Two novel triterpenoid saponins, identified as ursane-12,19-diene-28-oic acid 3β-O-β-D-glucuronopyranoside-6-O-methyl ester (1) and 3α,23α-dihydroxy-olean-9(11),12-diene-28-oic acid 28-O-β-D-glucopyranosyl ester (2), were isolated.
• Two known triterpenoids (3 and 4) were also identified.
• None of the tested compounds (1-4) demonstrated any significant cell-protective effect against H2O2-induced H9c2 cardiomyocyte injury.

Conclusions:

• The chemical investigation of Ilex cornuta stems led to the identification of two new triterpenoid saponins and two known triterpenoids.
• The isolated triterpenoid saponins and known triterpenoids from Ilex cornuta did not exhibit cardioprotective activity in the tested in vitro model.