Steroidal saponins from Tribulus terrestris

Area of Science:

• Natural Product Chemistry
• Pharmacology

Background:

• Tribulus terrestris is a medicinal plant with a history of traditional use.
• Steroidal saponins are a major class of bioactive compounds found in Tribulus terrestris.
• Understanding the chemical constituents and their bioactivities is crucial for its medicinal applications.

Purpose of the Study:

• To isolate and characterize steroidal saponins from Tribulus terrestris.
• To evaluate the platelet aggregation activities of the isolated compounds.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation using 1D and 2D NMR spectroscopy and mass spectrometry.
• Assessment of platelet aggregation activity in vitro.

Main Results:

• Sixteen steroidal saponins were isolated, with seven being previously unreported.
• The structures of all compounds were fully elucidated.
• Three known saponins showed significant potentiation of platelet aggregation.

Conclusions:

• The chemical diversity of steroidal saponins in Tribulus terrestris is extensive.
• Certain saponins from Tribulus terrestris possess notable bioactivity related to platelet function.
• These findings warrant further investigation into the pharmacological potential of these compounds.