Bioactive Compounds from Dioscorea Species and Their Pharmacological Activities

The genus Dioscorea comprises roughly 600 species widely known as yams, which serve as staple foods across tropical and subtropical regions. Beyond their nutritional value, Dioscorea species have emerged as rich sources of bioactive compounds including steroidal saponins, sapogenins such as diosgenin, polyphenols, phenanthrenes and polysaccharides. These metabolites display a remarkable spectrum of pharmacological activities. Steroidal saponins from wild yam have demonstrated significant anti-inflammatory and analgesic effects, acting through inhibition of key mediators such as COX-2 and proinflammatory cytokines. Phenanthrene derivatives exhibit potent antioxidant and anti-neuroinflammatory properties by scavenging reactive oxygen species and modulating nuclear factor-κB signalling. Polysaccharides isolated from several Dioscorea species have been shown to enhance immune responses, reduce lipid accumulation and improve glucose homeostasis in metabolic disease models.

In addition to anti-inflammatory and metabolic benefits, yam extracts display cytotoxic and hepatoprotective effects. Certain dihydroisocoumarins and dihydroisoflavones isolated from rhizomes exhibit selective antiproliferative activity against cancer cell lines, while steroidal glycosides from D. villosa confer resilience against oxidative hepatotoxic injury by bolstering intracellular glutathione levels. Other investigations have highlighted antimicrobial and antiviral potentials, reinforcing the versatility of Dioscorea secondary metabolites. These findings have catalysed interest in the development of functional foods, nutraceuticals and lead compounds for pharmaceutical application. Advanced analytical techniques, paired with biotechnological approaches such as endophytic fermentation, are now expanding the structural diversity and bioavailability of yam-derived agents, underscoring their global significance in health and disease management.

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Bioactive Compounds from Dioscorea Species and Their Pharmacological Activities publication trend

The graph below shows the total number of articles in bioactive compounds from dioscorea species and their pharmacological activities across all publications each year (not limited to Nature Index journals).

Technical terms

Steroidal saponins: Glycosidic compounds built on a steroid core, often responsible for membrane interaction and pharmacological effects.

Diosgenin: A steroidal sapogenin precursor of steroid drugs, notable for anti-inflammatory and metabolic regulatory activities.

Polyphenols: A diverse group of plant metabolites containing multiple phenolic rings, valued for antioxidant properties.

α-Glucosidase inhibitor: A class of compounds that delays carbohydrate digestion, used to moderate postprandial blood glucose levels.

Biotransformation: The use of biological agents, such as endophytic fungi, to chemically modify natural compounds, enhancing yield or activity.

References

1. Dioscorea spp.: Bioactive Compounds and Potential for the Treatment of Inflammatory and Metabolic Diseases. Molecules (2023).
2. Anti-inflammatory and antioxidant effects of 2, 7-dihydroxy-4, 6-dimethoxy phenanthrene isolated from Dioscorea batatas Decne. Applied Biological Chemistry (2019).
3. Hepatoprotective Effect of Steroidal Glycosides From Dioscorea villosa on Hydrogen Peroxide-Induced Hepatotoxicity in HepG2 Cells. Frontiers in Pharmacology (2018).
4. Dihydroisocoumarins and Dihydroisoflavones from the Rhizomes of Dioscorea collettii with Cytotoxic Activity and Structural Revision of 2,2′-Oxybis(1,4-di-tert-butylbenzene). Molecules (2021).
5. Study of Saponin Components after Biotransformation of Dioscorea nipponica by Endophytic Fungi C39. Journal of Analytical Methods in Chemistry (2022).
6. Isolation and identification of active ingredients and biological activity of Dioscorea nipponica Makino. BMC Complementary Medicine and Therapies (2023).