Anti-Inflammatory Properties of Flavonoids and Their Biological Applications

Flavonoids represent a diverse class of polyphenolic compounds ubiquitously present in fruits, vegetables and medicinal plants. Their anti-inflammatory efficacy is conferred by multiple mechanisms including inhibition of key enzymes, suppression of pro-inflammatory cytokines and modulation of intracellular signalling pathways. Principal molecular targets encompass cyclooxygenases, nuclear factor κB and mitogen-activated protein kinases, while potent antioxidant activities mitigate oxidative stress that otherwise amplifies tissue damage. Structure-activity studies have revealed that methylation, glycosylation and prenylation patterns critically influence both bioactivity and bioavailability. Advances in computational docking and in vitro assays have guided the rational design of derivatives with enhanced selectivity. Innovative delivery platforms—ranging from hydro-alcoholic solutions to biodegradable nanoparticles—have improved dermal penetration and controlled release, offering new avenues for topical therapy. Concurrently, investigations into hepatic metabolism and modulation of drug-metabolising enzymes emphasise the need for comprehensive pharmacokinetic profiling to anticipate herb–drug interactions. Collectively, flavonoids emerge as promising candidates for the development of nutraceuticals, adjuvant treatments for chronic inflammatory disorders and novel skin therapeutics, underpinned by their dietary abundance, low toxicity and global accessibility.

Research from Nature Portfolio

Recent studies have characterised flavonoid constituents isolated from plant resins that exhibit potent anti-inflammatory activity. Select phenolic glycosides demonstrated nanomolar affinity for cyclooxygenase-2, surpassing established inhibitors, and effectively reduced enzyme activity, tumour necrosis factor-α release, nuclear factor κB translocation and nitric oxide production in cellular models. Integration of in silico docking with in vitro validation underscores their potential as scaffold molecules for next-generation anti-inflammatory agents.

Anti-Inflammatory Properties of Flavonoids and Their Biological Applications publication trend

The graph below shows the total number of articles in anti-inflammatory properties of flavonoids and their biological applications across all publications each year (not limited to Nature Index journals).

Technical terms

Cyclooxygenase (COX): Enzyme family that catalyses the conversion of arachidonic acid into prostaglandins; COX-1 maintains physiological functions while COX-2 is induced during inflammation.

Nuclear factor κB (NF-κB): Transcription factor complex that controls expression of genes encoding cytokines, adhesion molecules and inflammatory enzymes.

Inducible nitric oxide synthase (iNOS): Enzyme responsible for high-output production of nitric oxide, a reactive mediator that contributes to vasodilation and inflammatory processes.

Tumour necrosis factor-α (TNF-α): Pro-inflammatory cytokine that orchestrates immune cell activation, apoptosis and systemic inflammation.

Mitogen-activated protein kinases (MAPKs): Signalling kinases (including JNK and p38) that transmit extracellular stimuli to regulate inflammatory gene expression.

References

1. In silico and in vitro anti-inflammatory study of phenolic compounds isolated from Eucalyptus maculata resin. Scientific Reports (2023).
2. Sakuranetin Inhibits Inflammatory Enzyme, Cytokine, and Costimulatory Molecule Expression in Macrophages through Modulation of JNK, p38, and STAT1. Evidence-based Complementary and Alternative Medicine (2016).
3. Screening Anti-Inflammatory Effects of Flavanones Solutions. International Journal of Molecular Sciences (2021).
4. Hepatic Metabolism of Sakuranetin and Its Modulating Effects on Cytochrome P450s and UDP-Glucuronosyltransferases. Molecules (2018).