Apigenin's Anticancer Mechanisms and Therapeutic Applications

Apigenin, a dietary flavonoid abundant in fruits and vegetables, exhibits a broad spectrum of anticancer activities. Its pleiotropic mechanisms include induction of programmed cell death, arrest of tumour cell proliferation, suppression of metastatic processes and modulation of the immune microenvironment. At the molecular level apigenin targets key signalling nodes such as PI3K/AKT, MAPK/ERK, JAK/STAT, NF-κB and Wnt/β-catenin pathways, thereby disrupting survival signals within malignant cells. It also alters redox homeostasis by promoting reactive oxygen species accumulation, triggering mitochondrial dysfunction and engaging both apoptosis and autophagy. Preclinical models have demonstrated that apigenin can synergise with chemotherapeutic agents to overcome drug resistance and enhance tumour eradication. Its favourable safety profile and oral bioavailability support ongoing efforts to develop apigenin as a therapeutic adjuvant or dietary supplement for cancer prevention and treatment.

Research from Nature Portfolio

Recent studies have elucidated novel aspects of apigenin’s antimetastatic and chemosensitising properties. In melanoma models, apigenin was shown to inhibit signal transducer and activator of transcription 3 (STAT3) phosphorylation, reduce its nuclear translocation and downregulate transcriptional targets such as MMP-2, MMP-9 and VEGF, thereby impairing cell migration, invasion and lung colonisation. Overexpression of STAT3 partially reversed these effects, affirming the flavonoid’s direct impact on this pathway. In non-small cell lung carcinoma, apigenin synergises with tumour necrosis factor-related apoptosis-inducing ligand (TRAIL) by upregulating death receptors DR4 and DR5 via a p53-dependent mechanism. Concurrent suppression of NF-κB, AKT and ERK prosurvival regulators further enhances TRAIL-induced apoptosis, leading to complete tumour growth inhibition in xenograft models when used in combination.

Apigenin's Anticancer Mechanisms and Therapeutic Applications publication trend

The graph below shows the total number of articles in apigenin's anticancer mechanisms and therapeutic applications across all publications each year (not limited to Nature Index journals).

Technical terms

Apoptosis: Programmed cell death mechanism characterised by caspase activation, chromatin condensation and membrane blebbing.

Autophagy: Cellular degradation pathway involving sequestration of cytoplasmic components in autophagosomes for lysosomal degradation.

Metastasis: Spread of cancer cells from the primary tumour to distant organs through invasion, intravasation and extravasation.

Reactive oxygen species (ROS): Chemically reactive molecules derived from oxygen that can damage cellular components and trigger cell death.

NF-κB pathway: Transcriptional regulator controlling genes involved in inflammation, survival and proliferation; often hyperactivated in cancer.

STAT3 pathway: Signal transducer and activator of transcription 3, a transcription factor promoting growth and metastasis in multiple tumour types.

References

1. Apigenin in cancer therapy: anti-cancer effects and mechanisms of action. Cell & Bioscience (2017).
2. Inhibition of the STAT3 signaling pathway contributes to apigenin-mediated anti-metastatic effect in melanoma. Scientific Reports (2016).
3. Apigenin potentiates TRAIL therapy of non-small cell lung cancer via upregulating DR4/DR5 expression in a p53-dependent manner. Scientific Reports (2016).
4. A Review on Flavonoid Apigenin: Dietary Intake, ADME, Antimicrobial Effects, and Interactions with Human Gut Microbiota. BioMed Research International (2019).
5. Oxidative Stress Triggered by Apigenin Induces Apoptosis in a Comprehensive Panel of Human Cervical Cancer‐Derived Cell Lines. Oxidative Medicine and Cellular Longevity (2017).
6. Apigenin blocks IKKα activation and suppresses prostate cancer progression. Oncotarget (2015).