Gallic Acid Applications in Cancer Therapy and Oxidative Stress Management

Gallic acid is a naturally occurring polyphenolic compound found in fruits, nuts and medicinal plants. It exhibits a dual mode of action in oncology and redox biology, acting both as an antioxidant that scavenges free radicals and as a pro-oxidant under defined conditions to induce cytotoxic stress in malignant cells. In cancer therapy, gallic acid triggers apoptosis and cell-cycle arrest by modulating key signalling axes such as MAPK, PI3K/Akt and NF-κB, downregulating oncogenic kinases and restoring tumour suppressor function. Its low systemic toxicity and ability to synergise with established chemotherapeutics have spurred the development of nano-formulations, prodrugs and targeted delivery systems. In oxidative stress management, gallic acid enhances endogenous antioxidant defences via activation of Nrf2 and AMPK, upregulating enzymes such as superoxide dismutase and catalase to protect against tissue injury. Collectively, these properties position gallic acid as a promising adjuvant in precision oncology and as a cytoprotective agent in disorders driven by reactive oxygen species.

Research from Nature Portfolio

Recent studies have elucidated how gallic acid attenuates hypertensive cardiac remodelling through redox-sensitive transcriptional control. In a rodent model of essential hypertension, oral gallic acid reduced blood pressure and left ventricular hypertrophy by inhibiting GATA4-mediated activation of the Nox2 promoter, thereby suppressing NADPH oxidase-derived ROS and downstream fibrotic pathways. This work highlights a direct link between gallic acid, transcriptional regulation of oxidative enzymes and vascular protection. Another investigation demonstrated that, when exposed to UV-A light, gallic acid can act as a pro-oxidant in microbial cells, augmenting intracellular ROS production and impairing antioxidant enzymes such as superoxide dismutase. Although explored in a bacterial context, this mechanism underscores the potential for harnessing light-activated gallic acid to generate cytotoxic oxidative stress selectively, a strategy translatable to photodynamic cancer therapies.

Gallic Acid Applications in Cancer Therapy and Oxidative Stress Management publication trend

The graph below shows the total number of articles in gallic acid applications in cancer therapy and oxidative stress management across all publications each year (not limited to Nature Index journals).

Technical terms

Reactive oxygen species (ROS): Chemically reactive molecules containing oxygen that can damage cellular components or signal adaptive responses.

Mitogen-activated protein kinase (MAPK): A family of kinases that transduce extracellular signals into cellular responses including proliferation, stress and apoptosis.

Nuclear factor erythroid 2–related factor 2 (Nrf2): A transcription factor that induces the expression of antioxidant and cytoprotective genes.

Nuclear factor-κB (NF-κB): A transcription factor central to inflammatory and immune responses, often upregulated in cancer and stress.

GATA4: A zinc-finger transcription factor involved in cardiac development and regulation of redox-sensitive genes.

Nanoparticle: A sub-micrometre particle designed to improve drug solubility, targeting and controlled release.

Prodrug: An inactive compound that is metabolically converted into an active pharmacological agent in the body.

Apoptosis: Programmed cell death characterised by caspase activation and DNA fragmentation, crucial for eliminating damaged or malignant cells.

References

1. Radiotracer labeled thymohydroquinyl gallate capped gold nanoparticles as a theranostic radiopharmaceutical for targeted antineoplastic and bioimaging. Journal of Pharmaceutical Analysis (2024).
2. Terminalia bellirica (Gaertn.) Roxb. Extract and Gallic Acid Attenuate LPS‐Induced Inflammation and Oxidative Stress via MAPK/NF‐κB and Akt/AMPK/Nrf2 Pathways. Oxidative Medicine and Cellular Longevity (2018).
3. Gallic Acid Reduces Blood Pressure and Attenuates Oxidative Stress and Cardiac Hypertrophy in Spontaneously Hypertensive Rats. Scientific Reports (2017).
4. On mechanism behind UV-A light enhanced antibacterial activity of gallic acid and propyl gallate against Escherichia coli O157:H7. Scientific Reports (2017).
5. Effect of Gallic acid in potentiating chemotherapeutic effect of Paclitaxel in HeLa cervical cancer cells. Cancer Cell International (2019).