ArticleIranian journal of basic medical sciences2026
Combined effects of EGCG and retinol on viability and apoptosis-related gene expression in Caco-2 and HCT-116 colon cancer cells.
Article in Iranian journal of basic medical sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objectives: Colorectal cancer remains a leading cause of cancer-related deaths worldwide, emphasizing the need for novel therapeutic strategies. Epigallocatechin-3-gallate (EGCG), a major green tea polyphenol, and retinol, a vitamin A derivative with antioxidant properties, have shown anti-cancer activity individually. This study investigates the combined effects of EGCG and retinol on human colorectal cancer cell lines, Caco-2 and HCT-116. Materials and Methods: Cytotoxic effects of EGCG and retinol, alone and in combination, were evaluated using resazurin-based cell viability assays. Intracellular reactive oxygen species (ROS) levels were measured by DCFDA assay to assess antioxidant activity. Changes in expression of apoptosis- and survival-related genes (p53, p21, AKT, and NF-κB) were analyzed using quantitative real-time PCR (RT-qPCR). Results: Combined treatment with EGCG and retinol reduced cell viability and intracellular ROS levels in both Caco-2 and HCT-116 cells. This treatment also modulated gene expression by increasing pro-apoptotic markers (p53 and p21) and decreasing anti-apoptotic markers (AKT and NF-κB), suggesting enhanced regulation of apoptosis-related pathways and inhibition of survival signaling. Conclusion: The combined effects of EGCG and retinol result in enhanced cytotoxicity, antioxidant activity, and modulation of apoptosis- and survival-related genes in colorectal cancer cells, supporting their potential as a combined therapeutic approach. Further studies are required to confirm these findings and explore clinical relevance.
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