Bioactive Compounds in Salix Species and Their Therapeutic Applications
Summary
Willow (Salix spp.) has been used for centuries as a source of analgesic and anti-inflammatory remedies, owing principally to salicin, a phenolic glycoside converted in vivo to salicylic acid. Beyond salicin, willows harbour a complex repertoire of bioactive constituents, including flavonoids, proanthocyanidins, phenolic acids and tannins. These secondary metabolites exhibit diverse pharmacological activities: modulation of inflammatory mediators, scavenging of free radicals, inhibition of microbial growth and regulation of lipid metabolism. Modern analytical techniques have identified over 300 distinct compounds across bark, leaves and twigs, many of which act synergistically. Mechanistic studies reveal that specific flavan-3-ols bind pro-inflammatory cytokines, while proanthocyanidins activate nuclear receptors to enhance fatty acid oxidation. Such multifaceted actions underscore Salix species as a valuable botanical resource for developing novel nutraceuticals, antimicrobial agents and antiobesity interventions, with global implications for sustainable harvesting and value-added utilisation of forestry by-products.
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Bioactive Compounds in Salix Species and Their Therapeutic Applications publication trend
The graph below shows the total number of articles in bioactive compounds in salix species and their therapeutic applications across all publications each year (not limited to Nature Index journals).
Technical terms
Proanthocyanidins: Condensed tannins composed of flavan-3-ol units known for antioxidant, antimicrobial and metabolic regulatory activities.
Phenolic glycosides: Aromatic compounds bound to sugar residues; salicin is the archetypal example, metabolised to produce anti-inflammatory effects.
Molecular docking: Computational technique that predicts how small molecules interact with target proteins, estimating binding affinity and orientation.
PPARα: Peroxisome proliferator-activated receptor alpha, a nuclear receptor that regulates genes involved in fatty acid transport and oxidation.
Minimum inhibitory concentration (MIC): The lowest concentration of a substance required to prevent visible growth of a microorganism.
References
- Polyphenols and Phenolic Glucosides in Antibacterial Twig Extracts of Naturally Occurring Salix myrsinifolia (Salisb.), S. phylicifolia (L.) and S. starkeana (Willd.) and the Cultivated Hybrid S. x pendulina (Wender.). Pharmaceutics (2024).
- Proanthocyanidins and Phenolic Compounds from the Twigs of Salix chaenomeloides and Their Anti-Lipogenic Effects on 3T3-L1 Preadipocytes. Nutrients (2024).
- Phytochemical Screening of Ultrasonic Extracts of Salix Species and Molecular Docking Study of Salix-Derived Bioactive Compounds Targeting Pro-Inflammatory Cytokines. International Journal of Molecular Sciences (2023).
- Phytochemistry, Pharmacology and Medicinal Uses of Plants of the Genus Salix: An Updated Review. Frontiers in Pharmacology (2021).
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