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Cells were treated with H2O2 and PtNPs for 3 h and subjected to the level of antioxidants activity. PtNPs were shown to increase the activity of antioxidants enzymes of (A) superoxide dismutase, (B) glutathione peroxidase, and (C) catalase activities. A statistically significant difference (p < 0.05) denoted in alphabet a–c (A), e–g (B), and i, k (C) that represents a comparison between a group to, a/e/i: untreated cells, b/f: PtNPs, and c/g/k: H2O2.
