Bioactive Compounds and Anti-Inflammatory Mechanisms in Medicinal Plants

Medicinal plants have long served as reservoirs of bioactive compounds—including flavonoids, terpenoids, alkaloids and phenolic acids—that exert potent anti-inflammatory effects through diverse molecular pathways. These secondary metabolites can modulate transcription factors such as NF-κB and AP-1, inhibit key enzymes including cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS), and down-regulate pro-inflammatory cytokines like tumour necrosis factor-α (TNF-α) and interleukin-6 (IL-6). Advances in phytochemical analysis and network pharmacology have revealed synergistic interactions among constituent compounds, underscoring the importance of whole-extract formulations as well as isolated natural products. Global research efforts have focused on elucidating precise mechanisms of action, optimising extraction techniques and assessing safety profiles, paving the way for novel therapeutics and functional foods. With chronic inflammatory diseases on the rise, the exploration of plant-derived anti-inflammatory agents is of critical significance for drug discovery, nutraceutical development and integrative medicine.

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Bioactive Compounds and Anti-Inflammatory Mechanisms in Medicinal Plants publication trend

The graph below shows the total number of articles in bioactive compounds and anti-inflammatory mechanisms in medicinal plants across all publications each year (not limited to Nature Index journals).

Technical terms

Alkaloid: Nitrogen-containing secondary metabolite with diverse pharmacological actions.

Flavonoid: Polyphenolic compound characterised by a 15-carbon skeleton, often exhibiting antioxidant and anti-inflammatory properties.

NF-κB: Transcription factor that regulates genes involved in immune and inflammatory responses.

Cyclooxygenase-2 (COX-2): Inducible enzyme catalysing prostanoid synthesis during inflammation.

Inducible nitric oxide synthase (iNOS): Enzyme responsible for high-output nitric oxide production in activated immune cells.

Cytokines: Signalling proteins, such as TNF-α and IL-6, that mediate and regulate inflammation.

Prostaglandin E2 (PGE2): Bioactive lipid mediator produced via COX-2, involved in vasodilation and inflammatory pain.

References

1. Anti‐Inflammatory Effects of Artemisia Leaf Extract in Mice with Contact Dermatitis In Vitro and In Vivo. Mediators of Inflammation (2016).
2. Screening of Vietnamese medicinal plants for NF-κB signaling inhibitors: Assessing the activity of flavonoids from the stem bark of Oroxylum indicum. Journal of Ethnopharmacology (2014).
3. The Biological Activities and Therapeutic Potentials of Baicalein Extracted from Oroxylum indicum: A Systematic Review. Molecules (2020).