Phytochemical Properties and Biological Activities of Sideritis Species

Sideritis, commonly known as mountain tea or ironwort, comprises over 150 species endemic to Mediterranean and mountainous regions. These plants are characterised by rich profiles of secondary metabolites, notably flavonoids, phenolic acids, phenylethanoid glycosides and terpenoids. Essential oils distilled from aerial parts exhibit variability driven by geographical and environmental factors, yet often contain monoterpenes and sesquiterpenes with demonstrated antimicrobial and antioxidant actions. Traditional uses span digestive complaints, inflammation and cognitive support, prompting modern investigations into neuroprotective, anti-inflammatory and anticancer activities. Extracts of Sideritis species display potent radical-scavenging capacity and modulate key cellular pathways, including oxidative stress response and inflammatory signalling. Recent work has elucidated specific bioactive constituents—such as sideridiol and verbascoside—responsible for both neuroprotection against amyloid β toxicity and inhibition of the NF-κB–NLRP3 inflammasome axis. Innovative formulation approaches, including phyto-nanocarriers combining Sideritis scardica extracts with clinoptilolite, aim to enhance bioavailability and targeted delivery, underscoring the genus’s promise for functional foods and lead compounds in drug development.

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Phytochemical Properties and Biological Activities of Sideritis Species publication trend

The graph below shows the total number of articles in phytochemical properties and biological activities of sideritis species across all publications each year (not limited to Nature Index journals).

Technical terms

Flavonoids: Polyphenolic compounds with antioxidant, anti-inflammatory and neuroprotective activities derived from plant secondary metabolism.

Phenylethanoid glycosides: A class of phenolic compounds, such as verbascoside, combining phenolic acids and sugars, noted for antioxidant and anti-inflammatory effects.

Amyloid β aggregation: The pathological self-assembly of amyloid β peptides into oligomers and fibrils implicated in Alzheimer’s disease neurotoxicity.

NF-κB: A transcription factor central to inflammatory signalling, immune response and cell survival, often targeted by anti-inflammatory agents.

NLRP3 inflammasome: A multiprotein complex that activates inflammatory cytokines in response to cellular stress and damage.

Phyto-nanocarrier: A hybrid delivery system combining plant extracts with nanomaterials to improve solubility, bioavailability and targeted release of phytochemicals.

References

1. Polyphenols and Other Bioactive Compounds of Sideritis Plants and Their Potential Biological Activity. Molecules (2020).
2. Beneficial Effects of Sideritis clandestina Extracts and Sideridiol against Amyloid β Toxicity. Antioxidants (2024).
3. Identification of anti-inflammatory and anti-cancer compounds targeting the NF-κB-NLRP3 inflammasome pathway from a phytochemical library of the Sideritis genus. Journal of Ethnopharmacology (2024).
4. An Innovative Approach to a Potential Neuroprotective Sideritis scardica-Clinoptilolite Phyto-Nanocarrier: In Vitro Investigation and Evaluation. International Journal of Molecular Sciences (2024).