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Antioxidant enzyme activity is decreased in SKBR3 cells after being exposed to silver nanoparticles (AgNPs): (a) catalase (CAT), (b) glutathione peroxidase (GPx), and (c) superoxide dismutase (SOD). ∗,#P < 0.05; ∗∗,##P < 0.01; ∗∗∗P < 0.001. ns: nonsignificant changes. ∗Significant changes compared to the control group. #Significant differences compared with 32 μg/ml group∗.
