Bioactive Triterpene Saponins in Medicinal Plants

Bioactive triterpene saponins constitute a diverse class of natural glycosides characterised by a pentacyclic triterpenoid core linked to one or more sugar chains. Widespread across many plant families—including Araliaceae, Leguminosae and Sapindaceae—these compounds serve defensive and signalling roles in planta. Their amphipathic structure underlies membrane-interacting properties that translate into a broad spectrum of pharmacological activities. In human health, triterpene saponins have been shown to exert anti-inflammatory, immunomodulatory, anticancer, antiviral and antifungal effects, often mediated through modulation of cellular signalling pathways, induction of apoptosis or enhancement of immune responses. Prominent examples include ginsenosides from Panax species, glycyrrhizin from Glycyrrhiza glabra and oleanolic-acid derivatives from various medicinal herbs. Advances in analytical techniques such as high-resolution mass spectrometry, nuclear magnetic resonance spectroscopy and metabolomic profiling have accelerated the identification of novel saponins. Meanwhile, biotechnological approaches—ranging from microbial synthetic biology to optimised plant cell cultures—are being developed to address challenges of low natural abundance and environmental sustainability. The global significance of triterpene saponins is underscored by their translation into pharmaceuticals, dietary supplements and vaccine adjuvants, with ongoing efforts to improve bioavailability and minimise toxicity. Integrating traditional ethnobotanical knowledge with modern drug discovery pipelines continues to reveal new therapeutic leads and agricultural applications for this versatile class of natural products.

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Bioactive Triterpene Saponins in Medicinal Plants publication trend

The graph below shows the total number of articles in bioactive triterpene saponins in medicinal plants across all publications each year (not limited to Nature Index journals).

Technical terms

Triterpene saponin: A natural glycoside composed of a pentacyclic triterpenoid aglycone attached to one or more sugar moieties, with surfactant properties and diverse bioactivities.

Aglycone: The non-sugar, hydrophobic portion of a glycoside molecule, in this context a triterpenoid backbone.

Glycoside: A compound in which a sugar is bound to another functional group via a glycosidic bond, affecting solubility and bioactivity.

Amphipathic: Having both hydrophilic (water-loving) and hydrophobic (water-repelling) regions, enabling interaction with cell membranes.

Metabolomic profiling: Comprehensive analysis of small-molecule metabolites in biological samples, used to characterise saponin diversity and abundance.

Cytotoxicity: The quality of being toxic to cells, often measured to evaluate potential anticancer effects.

Bioavailability: The proportion of a compound that enters systemic circulation and reaches target tissues, critical for therapeutic efficacy.

References

1. Chemical composition and enzyme inhibition of Phytolacca dioica L. seeds extracts. Journal of Enzyme Inhibition and Medicinal Chemistry (2019).
2. Comparative Analysis of Saponins from Different Phytolaccaceae Species and Their Antiproliferative Activities. Molecules (2017).
3. The Optimization of Medium Conditions and Auxins in the Induction of Adventitious Roots of Pokeweed (Phytolacca americana L.) and Their Phytochemical Constituents. Scientifica (2023).