Abstract
Colon cancer is the third most common human malignancy and a main cause of death worldwide. The current study was carried out to investigate the effects of cannabidiol, a cannabinoid, on angiogenesis and cell death in mice with experimental colon cancer induced by injection of CT26 cell line. Fifty male BALB/c mice were assigned randomly to five study groups, including: (1) negative control, (2) cancer control, (3) cancer vehicle control, (3) cancer treatment (1 mg/kg cannabidiol), and (5) cancer treatment (5 mg/kg cannabidiol). Treatment responses were evaluated based on histopathological examination, the expression of vascular endothelial growth factor (VEGF) gene, measurement of interleukins (ILs 6 and 8), oxidative stress parameters (glutathione peroxidase, glutathione reductase, superoxide dismutase serum activities, total antioxidant capacity, and malondialdehyde levels). In the present study, CBD reduced VEGF gene expression, decreased serum levels of IL6, IL8, and malondialdehyde, and increased antioxidant enzyme activity in mice with colon cancer. Moreover, cannabidiol induced apoptosis and reduced cellular pleomorphism. Cannabidiol can be potentially considered as an anti-colon cancer medicine as it exerts an inhibitory effect on angiogenesis, tumor growth, and metastasis through reducing VEGF gene expression, decreasing cytokines, and increasing antioxidant enzyme activities.
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