The Expression of Antioxidant Genes and Cytotoxicity of Biosynthesized Cerium Oxide Nanoparticles Against Hepatic Carcinoma Cell Line

Drug resistance due to genetic variations renders many therapeutic methods such assurgery,radiotherapy,chemotherapy,and hormone therapy unsuccessful in eradicating cancerous cells.Nowadays,application of nanoparticles (NPs) has been promising in destroying cancerous cells withoutside effects on normal cells.

This study aimed to investigate the antioxidant,anticancer effects of biosynthesizedcerium oxide nanoparticles (CeO2-NPs) on a hepatic carcinoma cell line.

MTT assay was used to determine the cytotoxicity of CeO2-NPs in concentrations of 0,15.6,31.2,62.5,125,and 250 μg,mL after 24,48,and 72 hours of incubation. Moreover,the expression levelsof catalase (CAT),superoxide dismutase (SOD) (the antioxidant genes) were investigated at differentconcentrations of CeO2-NPs using real-time polymerase chain reaction (PCR).

Our results showed a significant toxicity of the synthesized NPs against the cancerous liver cells.The IC50 calculated for CeO2-NPs was 500 μg,mL at 24 hours of incubation. In addition,the expressionlevels of CAT,SOD significantly (P<0.05) increased upon the treatment of cells with CeO2-NPs (500µg,mL) compared to the untreated cells.

Considering the minimal effects of the biosynthesized CeO2-NPs on normal cells,onthe other hand their considerable toxicity against hepatic cancer cells,these NPs could be utilized inmedicine,in the development of new drugs for cancer cells