Triterpene saponins from Chenopodium quinoa Willd

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Pharmacology

Background:

• Chenopodium quinoa is a plant source of various bioactive compounds.
• Triterpene saponins are a class of natural products with diverse biological activities.
• Understanding the chemical constituents and bioactivity of C. quinoa is important for potential therapeutic applications.

Purpose of the Study:

• To isolate and elucidate the structures of triterpene saponins from Chenopodium quinoa.
• To evaluate the cytotoxic and apoptosis-inducing activities of these saponins and their aglycones.
• To investigate the structure-activity relationships of these compounds.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation using 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy.
• Cytotoxicity testing in HeLa cells and apoptosis induction analysis in Caco-2 cells using flow cytometry.

Main Results:

• Twenty triterpene saponins (1-20) were isolated and characterized from different parts of C. quinoa.
• Four novel saponins (1-4) were identified, along with known saponins previously unreported in C. quinoa flowers and fruits.
• Saponins with an aldehyde group exhibited significant cytotoxic and apoptosis-inducing activities, with aglycones also showing activity.

Conclusions:

• Chenopodium quinoa is a rich source of diverse triterpene saponins.
• The presence of an aldehyde group in saponins is crucial for their cytotoxic and apoptosis-inducing effects.
• Further research into these saponins may lead to the development of new anticancer agents.