Antiproliferative activity of pomegranate peel extracts against colorectal cancer cells
Keywords:
Pomegranate peel extract, Cytotoxicity, Colorectal cancer cellsAbstract
Pomegranate peel (Punica granatum) exhibits diverse biological activities including antioxidant anti-inflammatory and anti-cancer properties. In Traditional Chinese Medicine, pomegranate peel has been reported as a potential treatment for cancer. This study aimed to evaluate the cytotoxicity and anti-cancer effects of two pomegranate peel extracts (ethanolic extract; PPE1 and commercial extract; PPE2) on HCT116 colorectal cancer cell line. The cell viability was assessed using the trypan blue exclusion assay. The results demonstrated that both PPE1 and PPE2 exhibited cytotoxic effects against HCT116 cells at increasing concentrations (25-200 µg/ml) and times dependent manners (24-48 h). At 24 hours, there was 50% cell death at concentrations more than 200 µg/ml. Additionally, at 48 hours, both PPE1 and PPE2 extracts at 200 µg/ml exhibited approximately 50% cell viability. We evaluated cell-proliferation and self-renewal abilities using the MTS and clonogenic assays. The result revealed that treatment of HCT116 with PPE1 (25-100 µg/ml) caused a statistically significant reduction in cell number (p<0.05) compared to the untreated control group. Treatment with PPE2 also resulted in a decrease of the cell number (p<0.05). Interestingly, both PPE1 and PPE2 significantly decreased the number and size of cellular colonies. These findings demonstrate that pomegranate peel extracts exhibit cytotoxicity and effectively inhibit the proliferation of colorectal cancer cells (HCT116). Pomegranate peel extract has promising potential for future development as a natural anticancer agent.
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