Proanthocyanidin Activity in Cancer Cell Models

Proanthocyanidins, oligomeric flavan-3-ol polymers found abundantly in grape seeds, skins and other plant sources, have been the focus of extensive research for their anticancer potential. In vitro studies across breast, liver, pancreatic, lung and colon cancer cell lines reveal that these compounds can both scavenge reactive oxygen species in normal cells and induce pro-oxidant stress selectively in malignant cells. By targeting key signalling pathways such as PI3K/Akt and MAPK, proanthocyanidins promote cell cycle arrest at G1/S or G2/M checkpoints, trigger mitochondrial-mediated apoptosis and downregulate inflammatory mediators and histone deacetylase activity. In vivo xenograft models confirm dose-dependent suppression of tumour growth, underpinning the global significance of proanthocyanidins as chemopreventive agents and adjuncts to conventional therapy.

Research from Nature Portfolio

Recent studies have demonstrated that grape seed proanthocyanidin extract inhibits DNA and protein damage as well as labile iron activity in vitro, while also suppressing enzymatic targets implicated in tumour progression. Treatment of breast, liver and colorectal cancer cell models with this extract led to significant reductions in cell viability after 48 hours, illustrating multifunctional antioxidant and enzyme-inhibitory mechanisms. In a foundational chemically induced liver cancer model, proanthocyanidin-rich extract markedly decreased pre-neoplastic foci formation, induced apoptosis via caspase activation, enforced G2/M and G1/S cell cycle arrest and attenuated inflammatory signalling through downregulation of cyclooxygenase-2, inducible nitric oxide synthase and nuclear factor-κB. This convergence of oxidative stress mitigation, apoptotic induction and anti-inflammatory effects highlights the therapeutic promise of proanthocyanidins in both early-stage carcinogenesis and established tumours.

Proanthocyanidin Activity in Cancer Cell Models publication trend

The graph below shows the total number of articles in proanthocyanidin activity in cancer cell models across all publications each year (not limited to Nature Index journals).

Technical terms

Proanthocyanidins: A class of polyphenolic compounds formed from flavan-3-ol subunits, known for dual antioxidant and pro-oxidant activities that modulate cancer cell survival.

Apoptosis: Programmed cell death characterised by mitochondrial membrane permeabilisation, caspase activation and DNA fragmentation, essential for removal of damaged or malignant cells.

Oxidative stress: A condition in which reactive oxygen species overwhelm cellular antioxidant defences, leading to damage of DNA, proteins and lipids.

Cell cycle arrest: The halting of cell division at defined checkpoints (e.g. G1/S or G2/M) to allow DNA repair or to initiate apoptosis in cells with irreparable damage.

Xenograft model: An in vivo approach in which human cancer cells are implanted into immunodeficient animals to study tumour biology and assess therapeutic interventions.

References

1. In Vitro Evaluation of Biological and Anticancer Activities Exhibited by Five Varieties of Vitis vinifera L.. International Journal of Molecular Sciences (2023).
2. Correlation between antioxidant and anticancer activity and phenolic profile of new Apulian table grape genotypes (V. Vinifera L.). Frontiers in Plant Science (2023).
3. Molecular characterization of the grape seeds extract’s effect against chemically induced liver cancer: In vivo and in vitro analyses. Scientific Reports (2018).
4. Grape Proanthocyanidins Induce Apoptosis by Loss of Mitochondrial Membrane Potential of Human Non-Small Cell Lung Cancer Cells In Vitro and In Vivo. PLOS ONE (2011).
5. Grape Proanthocyanidin Inhibit Pancreatic Cancer Cell Growth In Vitro and In Vivo through Induction of Apoptosis and by Targeting the PI3K/Akt Pathway. PLOS ONE (2012).
6. Grape seed proanthocyanidin extract inhibits DNA and protein damage and labile iron, enzyme, and cancer cell activities. Scientific Reports (2022).